MicroPressure Board Mount Pressure Sensors, MPR Series
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MicroPressure Board Mount Pressure Sensors, MPR Series
The MPR Series is a very small piezoresistive silicon pressure sensor offering a digital output for reading pressure over the specified full scale pressure span and temperature range. It is calibrated and compensated over a specific temperature range for sensor offset, sensitivity, temperature effects, and non-linearity using an on-board Application Specific Integrated Circuit (ASIC). This product is designed to meet the requirements of higher volume medical (consumer and non-consumer) devices and commercia
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MPR SERIES 32332628 Issue H MicroPressure Board Mount Pressure Sensors Compact, High Accuracy, Compensated/Amplified DESCRIPTION The MPR Series is a very small piezoresistive silicon pressure sensor offering a digital output for reading pressure over the specified full scale pressure span and temperature range. It is calibrated and compensated over a specific temperature range for sensor offset, sensitivity, temperature effects, and non-linearity using an on-board Application Specific Integrated Circuit (ASIC). This product is designed to meet the requirements of higher volume medical (consumer and non-consumer) devices, commercial appliance, and industrial/HVAC applications. DIFFERENTIATION � Application-specific design addresses various application needs and challenges. � Digital output: Plug and play feature enables ease of implementation and system level connectivity. � Total Error Band: Provides a more comprehensive measurement of performance over the compensated temperature range, which minimizes testing and calibrating every sensor, thereby potentially reducing manufacturing cost; improves sensor accuracy and offers ease of sensor interchangeability due to minimal partto-part variation. (See Figure 1.) VALUE TO CUSTOMERS � Very small form factor: Enables portability by addressing weight, size, and space restrictions; occupies less area on the PCB. � Wide pressure ranges simplify use. � Enhances performance: Output accelerates performance through reduced conversion requirements and direct interface to microprocessors. � Value solution: Cost-effective, higher volume solution with configurable options. � Meets IPC/JEDEC J-STD-020D.1 Moisture Sensitivity Level 1 requirements: Allows avoidance of thermal and mechanical damage during solder reflow attachment and/ or repair that lesser rated sensors may incur; allows long floor life when stored as specified (simplifying storage and reducing scrap); eliminates lengthy bakes prior to reflow, and allows for lean manufacturing due to stability and usability shortly after reflow. � Meets food safety certification for North America, Europe and Asia (see Table 2). POTENTIAL APPLICATIONS � Consumer medical: Non-invasive blood pressure monitoring, negativepressure wound therapy, breast pumps, mobile oxygen concentrators, airflow monitors, CPAP water tanks, and medical wearables � Non-consumer medical: Invasive blood pressure monitors, ambulatory blood pressure measurement � Industrial: Air braking systems, gas and water meters � Consumer: Coffee machines, humidifiers, air beds, washing machines, dishwashers FEATURES � 5 mm x 5 mm [0.20 in x 0.20 in] package footprint � Calibrated and compensated � 60 mbar to 2.5 bar | 6 kPa to 250 kPa | 1 psi to 30 psi � 24-bit digital I2C or SPI-compatible output � IoT (Internet of Things) ready interface � Stainless steel pressure port � Compatible with a variety of liquid media � Absolute and gage pressure types � Total Error Band after customer auto- zero: As low as �1.25 %FSS � Compensated temperature range: 0�C to 50�C [32�F to 122�F] � REACH and RoHS compliant � Meets IPC/JEDEC J-STD-020D.1 Moisture Sensitivity Level 1 � Select sensors available on breakout board for easy evaluation and testing � Ultra-low power consumption (as low as 0.01 mW typ. average power, 1 Hz measurement frequency) � Sensor materials have been tested and certified for these food safety standards: - NSF-169 - BPA Free - LFGB The MPR Series joins an extensive line of board mount pressure sensors for potential use in medical, industrial, and consumer applications. To view the entire product portfolio, click here. MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES Table of Contents General Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 Power Consumption and Standby Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 Product Nomenclature and Order Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Pressure Port/Range/Reference Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Pressure Range Specifications: 60 mbar to 2.5 bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 kPa to 250 kPa . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1 psi to 30 psi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 0 mmHg to 300 mmHg . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.0 GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.0 PINOUT AND FUNCTIONALITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.0 START-UP TIMING. . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.0 POWER SUPPLY REQUIREMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.0 REFERENCE CIRCUIT DESIGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.1 I2C and SPI Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.2 Bypass Capacitor Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.0 I2C COMMUNICATIONS 6.1 I2C Bus Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.2 I2C Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.3 I2C Sensor Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.4 I2C Pressure Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.5 I2C Status Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.6 I2C Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.6.1 Output Measurement Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.6.2 I2C Sensor Address of 0x18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6.7 I2C Timing and Level Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.0 SPI COMMUNICATIONS 7.1 SPI Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7.2 SPI Data Transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7.3 SPI Pressure Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7.4 SPI Status Byte. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.5 SPI Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.6 SPI Timing and Level Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8.0 MPR SERIES DIGITAL OUTPUT PRESSURE CALCULATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Long Port Dimensions and Recommended PCB Pad Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Short Port Dimensions and Recommended PCB Pad Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Tape and Reel Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Reflowable Protective Silicone Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Reflowable Protective Silicone Cap Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Recommended Tubing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Recommended O-Rings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Additional Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . back 2 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES FIGURE 1. TEB COMPONENTS FOR THE MPR SERIES Total Error Band (TEB) is a single specification that includes the major sources of sensor error. TEB should not be confused with accuracy, which is actually a component of TEB. TEB is the worst error that the sensor could experience. Honeywell uses the TEB specification in its datasheet because it is the most comprehensive measurement of a sensor's true accuracy. Honeywell also provides the accuracy specification in order to provide a common comparison with competitors' literature that does not use the TEB specification. Many competitors do not use TEB--they simply specify the accuracy of their device. Their accuracy specification, however, may exclude certain parameters. On their datasheet, the errors are listed individually. When combined, the total error (or what would be TEB) could be significant. Sources of Error Offset Full Scale Span Pressure Non-Linearity Pressure Hysteresis Pressure Non-Repeatability Thermal Effect on Offset Thermal Effect on Span Thermal Hysteresis A ccu rac y BFSL Total Error Band TABLE 1. ABSOLUTE MAXIMUM RATINGS1 CHARACTERISTIC MIN. MAX. Supply voltage (Vsupply) Voltage on any pin ESD susceptibility (human body model) -0.3 -0.3 -- 3.6 Vsupply + 0.3 4 Storage temperature -40 [-40] 85 [185] Soldering peak reflow temperature and time 15 s max. at 250�C [482�F] 1Absolute maximum ratings are the extreme limits the device will withstand without damage. UNIT Vdc V kV �C [�F] TABLE 2. ENVIRONMENTAL SPECIFICATIONS CHARACTERISTIC PARAMETER Humidity: external surfaces internal surfaces 0 %RH to 95 %RH, non-condensing 0 %RH to 100 %RH, condensing Vibration 10 g, 10 Hz to 2 kHz Shock 50 g, 6 ms duration Solder reflow Certification (food grade gel coating option) J-STD-020-D.1 Moisture Sensitivity Level 1 (unlimited shelf life when stored at <30�C/85 %RH) NSF-169, BPA Free, LFGB TABLE 3. WETTED MATERIALS COMPONENT MATERAL Port 304 stainless steel Adhesives epoxy Electronic components silicon, glass, gold, aluminum Metal gel ring 304 stainless steel Sensing and Internet of Things 3 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES TABLE 4. SENSOR PRESSURE TYPES PRESSURE TYPE DESCRIPTION Absolute Output is proportional to the difference between applied pressure and a built-in vacuum reference. Gage Output is proportional to the difference between applied pressure and atmospheric (ambient) pressure. TABLE 5. OPERATING SPECIFICATIONS CHARACTERISTIC MIN. TYP. MAX. UNIT Supply voltage (Vsupply):1 Current consumption: I2C sleep/standby mode SPI sleep/standby mode 1.8 3.3 3.6 Vdc 3.0 33.8 211 nA 13.0 43.8 221.0 nA Power consumption -- 10 -- mW Operating temperature range2 -40 [-40] -- 85 [185] �C [�F] Compensated temperature range3 0 [32] -- 50 [122] �C [�F] Startup time (power up to data ready) -- -- 2.5 ms Data rate (assumes command AAHEX) I2C/SPI voltage level: low high 161 204 -- -- 80 -- -- samples per second 20 %Vsupply -- Pull up on MISO, SCLK, SS, MOSI 1 -- -- kOhm Accuracy4 -- -- �0.25 %FSS BFSL5 Resolution: transfer function A transfer function B transfer function C 14.0 -- -- 13.5 -- -- bits 14.0 -- -- 1The sensor is not reverse polarity protected. Incorrect application of supply voltage or ground to the wrong pin may cause electrical failure. 2Operating temperature range: The temperature range over which the sensor will produce an output proportional to pressure. 3Compensated temperature range: The temperature range over which the sensor will produce an output proportional to pressure within the specified performance limits (Total Error Band). 4Accuracy: The maximum deviation in output from a Best Fit Straight Line (BFSL) fitted to the output measured over the pressure range. Includes all errors due to pressure non-linearity, pressure hysteresis, and non-repeatability. 5Full Scale Span (FSS): The algebraic difference between the output signal measured at the maximum (Pmax.) and minimum (Pmin.) limits of the pressure range. (See Figure 4 for pressure ranges.) 4 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES POWER CONSUMPTION AND STANDBY MODE The sensor is normally in Standby Mode and is only turned on in response to a user command, thus minimizing power consumption. Upon receiving the user command, the sensor wakes up from Standby Mode, runs a measurement in Active State, and automatically returns to Standby Mode, awaiting the next command. The resulting sensor power consumption is a function of the sampling rate (samples per second) as shown in Tables 6 and 7 and Figures 2 and 3. TABLE 6. AVERAGE POWER CONSUMPTION AT 1.8 VSUPPLY (ASSUMES COMMAND AAHEX) SAMPLING RATE (samples per second) AVERAGE POWER (mW) ACTIVE TIME (ms) ACTIVE POWER (mW) IDLE TIME (ms) Minimum Average Power 1 0.0068 3.625 1.884 996.375 2 0.0137 7.25 1.884 992.75 5 0.0341 18.125 1.884 981.875 10 0.0683 36.25 1.884 963.75 20 0.1366 72.5 1.884 963.75 50 0.3414 181.25 1.884 818.75 100 0.6829 362.5 1.884 637.5 160 1.0926 580 1.884 420 Typical Average Power 1 0.0094 4.157 2.248 995.843 2 0.0187 8.314 2.248 991.686 5 0.0468 20.785 2.248 979.215 10 0.0935 41.57 2.248 958.43 20 0.1870 83.14 2.248 916.86 50 0.4673 207.85 2.248 792.15 100 0.9345 415.7 2.248 584.3 160 1.4592 665.12 2.248 334.88 Maximum Average Power 1 0.0129 4.839 2.588 995.161 2 0.0254 9.678 2.588 990.322 5 0.0630 24.195 2.588 975.805 10 0.1256 48.39 2.588 951.61 20 0.2508 96.78 2.588 903.22 50 0.6264 241.95 2.588 758.05 100 1.2524 483.9 2.588 516.1 160 2.0036 774.24 2.588 225.76 IDLE POWER (mW) 0.0000054 0.0000054 0.0000054 0.0000054 0.0000054 0.0000054 0.0000054 0.0000054 0.00006084 0.00006084 0.00006084 0.00006084 0.00006084 0.00006084 0.00006084 0.00006084 0.0003798 0.0003798 0.0003798 0.0003798 0.0003798 0.0003798 0.0003798 0.0003798 FIGURE 2. AVERAGE POWER CONSUMPTION VS SAMPLING RATE AT 1.8 VSUPPLY Average Power Consumption (mW) 2.75 2.50 2.25 2.00 Maximum average power (mW) 1.75 1.50 Typical average power (mW) 1.25 1.00 Minimum average power (mW) 0.75 0.50 0.25 0.00 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 Sampling Rate (samples per second) Sensing and Internet of Things 5 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES TABLE 7. AVERAGE POWER CONSUMPTION AT 3.3 VSUPPLY (ASSUMES COMMAND AAHEX) SAMPLING RATE (Samples per second) AVERAGE POWER (mW) ACTIVE TIME (ms) ACTIVE POWER (mW) IDLE TIME (ms) Minimum Average Power 1 0.0114 3.625 3.134 996.375 2 0.0227 7.25 3.134 992.75 5 0.0568 18.125 3.134 981.875 10 0.1136 36.25 3.134 963.75 20 0.2272 72.5 3.134 963.75 50 0.5680 181.25 3.134 818.75 100 1.1361 362.5 3.134 637.5 160 1.8177 580 3.134 420 Typical Average Power 1 0.0156 4.157 3.729 995.843 2 0.0311 8.314 3.729 991.686 5 0.0776 20.785 3.729 979.215 10 0.1551 41.57 3.729 958.43 20 0.3101 83.14 3.729 916.86 50 0.7751 207.85 3.729 792.15 100 1.5501 415.7 3.729 584.3 160 2.4800 665.12 3.729 334.88 Maximum Average Power 1 0.0214 4.839 4.275 995.161 2 0.0421 9.678 4.275 990.322 5 0.1041 24.195 4.275 975.805 10 0.2075 48.39 4.275 951.61 20 0.4144 96.78 4.275 903.22 50 1.0349 241.95 4.275 758.05 100 2.0692 483.9 4.275 516.1 160 3.3103 774.24 4.275 225.76 IDLE POWER (mW) 0.0000099 0.0000099 0.0000099 0.0000099 0.0000099 0.0000099 0.0000099 0.0000099 0.00011154 0.00011154 0.00011154 0.00011154 0.00011154 0.00011154 0.00011154 0.00011154 0.0006963 0.0006963 0.0006963 0.0006963 0.0006963 0.0006963 0.0006963 0.0006963 FIGURE 3. AVERAGE POWER CONSUMPTION VS SAMPLING RATE AT 3.3 VSUPPLY Average Power Consumption (mW) 4.25 4.00 3.75 3.50 3.25 3.00 2.75 2.50 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0.00 0 Maximum average power (mW) Typical average power (mW) Minimum average power (mW) 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 Sampling Rate (samples per second) 6 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES FIGURE 4. PRODUCT NOMENCLATURE AND ORDER GUIDE For example, MPRLS0025PA00001A defines an MPR Series pressure sensor, long port, silicone gel, 0 psi to 25 psi absolute pressure range, I2C, address 0x18, 10% to 90% of 224 counts transfer function, no breakout board. Product Series MPR Pressure Port L Long S Short Gel S Silicone F Food grade M P R L S 0 0 2 5 P A 0 0 0 0 1 A2 Transfer Function A 10% to 90% of 224 counts B 2.5% to 22.5% of 224 counts C 20% to 80% of 224 counts Output Type S SPI 0 I2C, Address 0x08 1 I2C, Address 0x18 2 I2C, Address 0x28 3 I2C, Address 0x38 4 I2C, Address 0x48 5 I2C, Address 0x58 6 I2C, Address 0x68 7 I2C, Address 0x78 Low Pressure 0000 Pressure Range, Unit and Reference1 Absolute Absolute Absolute 0001BA 0 bar to 1 bar 01.6BA 0 bar to 1.6 bar 02.5BA 0 bar to 2.5 bar 0100KA 0 kPa to 100 kPa 0160KA 0 kPa to 160 kPa 0250KA 0 kPa to 250 kPa 0015PA 0025PA 0030PA 0 psi to 15 psi 0 psi to 25 psi 0 psi to 30 psi Gage Gage Gage Gage 0060MG 0 mbar to 60 mbar 0100MG 0 mbar to 100 mbar 0160MG 0 mbar to 160 mbar 0250MG 0 mbar to 250 mbar 0400MG 0 bar to 400 mbar 0600MG 0 bar to 600 mbar 0001BG 0 bar to 1 bar 01.6BG 0 bar to 1.6 bar 02.5BG 0 bar to 2.5 bar 0006KG 0010KG 0016KG 0025KG 0040KG 0060KG 0100KG 0160KG 0250KG 0 kPa to 6 kPa 0 kPa to 10 kPa 0 kPa to 16 kPa 0 kPa to 25 kPa 0 kPa to 40 kPa 0 kPa to 60 kPa 0 kPa to 100 kPa 0 kPa to 160 kPa 0 kPa to 250 kPa 0001PG 0005PG 0015PG 0030PG 0 psi to 1 psi 0 psi to 5 psi 0 psi to 15 psi 0 psi to 30 psi 0300YG 0 mmHg to 300 mmHg N inH20 G MPa H HPa C cmH20 Other calibration units may be specified. 1 Custom pressure ranges are available. Contact Honeywell Customer Service for more information. 2 See Table 9 for available catalog listings. MPR Series Sensor Mounted on a Breakout Board Breakout boards, designed for use with the Honeywell SEK002 Sensor Evaluation Kit, are available with the sensor already mounted. MPR Series with long port mounted on a breakout board. MPR Series with short port mounted on a breakout board. TABLE 8. ORDER GUIDE FOR MPR SERIES SENSOR ON BREAKOUT BOARD CATALOG LISTING DESCRIPTION MPRLS0025PA00001AB Breakout board with 0 psi to 25 psi absolute sensor, long port, with gel, I2C = 0x18, transfer function A MPRLS0015PA0000SAB Breakout board with 0 psi to 15 psi absolute sensor, long port, with gel, SPI, transfer function A MPRLS0300YG00001BB Breakout board with 0 mmHg to 300 mmHg gage sensor, long port, with gel, I2C = 0x18, transfer function B MPRSS0001PG00001CB Breakout board with 0 psi to 1 psi gage sensor, short port, with gel, I2C = 0x18, transfer function C Sensing and Internet of Things 7 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES FTIGAUBLREE 94.. APVRAOIDLUABCLTENCOOMNEFNIGCLUARTAUTRIOENS ORDER CODE PRESSURE RANGE 0001BA 01.6BA 02.5BA 010 0K A 0160K A 0250KA 0015PA 0025PA 0030PA 0 to 1 bar 0 to 1.6 bar 0 to 2.5 bar 0 to 100 kPa 0 to 160 kPa 0 to 250 kPa 0 to 15 psi 0 to 25 psi 0 to 30 psi 0060MG 0100MG 0160MG 0250MG 0400MG 0600MG 0001BG 01.6BG 02.5BG 0006KG 0010KG 0016KG 0025KG 0040KG 0060KG 0100KG 0160KG 0250KG 0001PG 0005PG 0015PG 0030PG 0300YG 0 to 60 mbar 0 to 100 mbar 0 to 160 mbar 0 to 250 mbar 0 to 400 mbar 0 to 600 mbar 0 to 1 bar 0 to 1.6 bar 0 to 2.5 bar 0 to 6 kPa 0 to 10 kPa 0 to 16 kPa 0 to 25 kPa 0 to 40 kPa 0 to 60 kPa 0 to 100 kPa 0 to 160 kPa 0 to 250 kPa 0 to 1 psi 0 to 5 psi 0 to 15 psi 0 to 30 psi 0 to 300 mmHg PRESSURE PORT Absolute long long long long long long long long long Gage long, short long, short long, short long, short long long long long long long, short long, short long, short long, short long long long long long long, short long long long long GEL silicone silicone silicone silicone silicone silicone silicone silicone silicone silicone, food grade silicone, food grade silicone, food grade silicone, food grade silicone silicone silicone silicone silicone silicone, food grade silicone, food grade silicone, food grade silicone, food grade silicone silicone silicone silicone silicone ssilicone, food grade silicone silicone silicone silicone TRANSFER FUNCTION A, B A, B A, B A, B A, B A, B A, B A, B A, B C C C C A, B A, B A, B A, B A, B C C C C A, B A, B A, B A, B A, B C A, B A, B A, B B 8 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES TABLE 10. PRESSURE RANGE SPECIFICATIONS FOR 60 MBAR TO 2.5 BAR PRESSURE RANGE (SEE FIGURE 4.) PRESSURE RANGE PMIN. PMAX. UNIT OVER PRESSURE1 BURST PRESSURE2 TOTAL ERROR BAND AFTER CUSTOMER AUTO-ZERO3 (%FSS) Absolute 0001BA 0 1 bar 4 8 �1.54 TOTAL ERROR BAND, TYPICAL (%FSS) �1.5 TRANSFER FUNCTION A, B 01.6BA 0 1.6 bar 4 8 �1.54 �1.5 A, B 02.5BA 0 2.5 bar 4 8 �1.54 �1.5 A, B 0060MG Gage 0 60 mbar 350 700 �1.25 �2.5 C 0100MG 0 100 mbar 350 700 �1.25 �2.5 C 0160MG 0 160 mbar 350 700 �1.25 �2.5 C 0250MG 0 250 mbar 350 700 �1.25 �2.5 C 0400MG 0 400 mbar 4000 8000 �2.0 �2.5 A, B 0600MG 0 600 mbar 4000 8000 �2.0 �2.5 A, B 0001BG 0 1 bar 4 8 �1.5 �2.5 A, B 01.6BG 0 1.6 bar 4 8 �1.5 �2.5 A, B 02.5BG 0 2.5 bar 4 8 �1.5 �2.5 A, B 1 Overpressure: The maximum pressure which may safely be applied to the product for it to remain in specification once pressure is returned to the operating pressure range. Exposure to higher pressures may cause permanent damage to the product. Unless otherwise specified this applies to all available pressure ports at any temperature with the operating temperature range. The customer's pressure connection system (tubing or O-rings) must be specified to be equal to, or greater than, the rated overpressure limit. Due to the possibility of light sensitivity, opaque tubing is recommended. 2 Burst Pressure: The maximum pressure that may be applied to any port of the product without causing escape of pressure media. Product should not be expected to function after exposure to any pressure beyond the burst pressure. 3 Total Error Band after Customer Auto-Zero: The maximum deviation from the ideal transfer function over the entire compensated pressure range for a minimum of 24 hours after an auto-zero operation. Includes all errors due to full scale span, pressure non-linearity, pressure hysteresis, and thermal effect on span. Low pressure MPR sensors may exhibit offset shifts after reflow solder. See Technical Note "Auto-Zero Calibration Technique for Pressure Sensors" (008326-1-EN) if this shift is significant in a particular application. 4 Because atmospheric pressure is continually changing, autozeroing an absolute pressure sensor requires a reference standard. If the actual absolute pressure is important in an application (such as for a barometer), an external precision reference is needed to set the offset to the correct current value of atmospheric pressure. In applications where the difference between multiple absolute sensors is important, any reference may be used (such as one of the other absolute pressure sensors in a system, or even an arbitrary pressure like 14.7 psia), as long as it is consistent and repeatable. Sensing and Internet of Things 9 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES TABLE 11. PRESSURE RANGE SPECIFICATIONS FOR 6 KPA TO 250 KPA PRESSURE RANGE (SEE FIGURE 4.) PRESSURE RANGE PMIN. PMAX. UNIT OVER PRESSURE1 BURST PRESSURE2 TOTAL ERROR BAND AFTER CUSTOMER AUTO-ZERO3 (%FSS) Absolute 010 0K A 0 100 kPa 400 800 �1.54 TOTAL ERROR BAND, TYPICAL (%FSS) �1.5 TRANSFER FUNCTION A, B 0160K A 0 160 kPa 400 800 �1.54 �1.5 A, B 0250KA 0 250 kPa 400 800 �1.54 �1.5 A, B 0006KG Gage 0 6 kPa 35 70 �1.25 �2.5 C 0010KG 0 10 kPa 35 70 �1.25 �2.5 C 0016KG 0 16 kPa 35 70 �1.25 �2.5 C 0025KG 0 25 kPa 35 70 �1.25 �2.5 C 0040KG 0 40 kPa 400 800 �2.0 �2.5 A, B 0060KG 0 60 kPa 400 800 �2.0 �2.5 A, B 0100KG 0 100 kPa 400 800 �1.5 �2.5 A, B 0160KG 0 160 kPa 400 800 �1.5 �2.5 A, B 0250KG 0 250 kPa 400 800 �1.5 �2.5 A, B 1 Overpressure: The maximum pressure which may safely be applied to the product for it to remain in specification once pressure is returned to the operating pressure range. Exposure to higher pressures may cause permanent damage to the product. Unless otherwise specified this applies to all available pressure ports at any temperature with the operating temperature range. The customer's pressure connection system (tubing or O-rings) must be specified to be equal to, or greater than, the rated overpressure limit. Due to the possibility of light sensitivity, opaque tubing is recommended. 2 Burst Pressure: The maximum pressure that may be applied to any port of the product without causing escape of pressure media. Product should not be expected to function after exposure to any pressure beyond the burst pressure. 3 Total Error Band after Customer Auto-Zero: The maximum deviation from the ideal transfer function over the entire compensated pressure range for a minimum of 24 hours after an auto-zero operation. Includes all errors due to full scale span, pressure non-linearity, pressure hysteresis, and thermal effect on span. Low pressure MPR sensors may exhibit offset shifts after reflow solder. See Technical Note "Auto-Zero Calibration Technique for Pressure Sensors" (008326-1-EN) if this shift is significant in a particular application. 4 Because atmospheric pressure is continually changing, autozeroing an absolute pressure sensor requires a reference standard. If the actual absolute pressure is important in an application (such as for a barometer), an external precision reference is needed to set the offset to the correct current value of atmospheric pressure. In applications where the difference between multiple absolute sensors is important, any reference may be used (such as one of the other absolute pressure sensors in a system, or even an arbitrary pressure like 14.7 psia), as long as it is consistent and repeatable. 10 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES TABLE 12. PRESSURE RANGE SPECIFICATIONS FOR 1 PSI TO 30 PSI PRESSURE RANGE (SEE FIGURE 4.) PRESSURE RANGE PMIN. PMAX. UNIT OVER PRESSURE1 BURST PRESSURE2 TOTAL ERROR BAND AFTER CUSTOMER AUTO-ZERO3 (%FSS) Absolute 0015PA 0 15 psi 60 120 �1.54 TOTAL ERROR BAND, TYPICAL (%FSS) �1.5 TRANSFER FUNCTION A, B 0025PA 0 25 psi 60 120 �1.54 �1.5 A, B 0030PA 0 30 psi 60 120 �1.54 �1.5 A, B Gage 0001PG 0 1 psi 5 10 �1.25 �2.5 C 0005PG 0 5 psi 60 120 �2.0 �2.5 A, B 0015PG 0 15 psi 60 120 �1.5 �2.5 A, B 0030PG 0 30 psi 60 120 �1.5 �2.5 A, B 1 Overpressure: The maximum pressure which may safely be applied to the product for it to remain in specification once pressure is returned to the operating pressure range. Exposure to higher pressures may cause permanent damage to the product. Unless otherwise specified this applies to all available pressure ports at any temperature with the operating temperature range. The customer's pressure connection system (tubing or O-rings) must be specified to be equal to, or greater than, the rated overpressure limit. Due to the possibility of light sensitivity, opaque tubing is recommended. 2 Burst Pressure: The maximum pressure that may be applied to any port of the product without causing escape of pressure media. Product should not be expected to function after exposure to any pressure beyond the burst pressure. 3 Total Error Band after Customer Auto-Zero: The maximum deviation from the ideal transfer function over the entire compensated pressure range for a minimum of 24 hours after an auto-zero operation. Includes all errors due to full scale span, pressure non-linearity, pressure hysteresis, and thermal effect on span. Low pressure MPR sensors may exhibit offset shifts after reflow solder. See Technical Note "Auto-Zero Calibration Technique for Pressure Sensors" (008326-1-EN) if this shift is significant in a particular application. 4 Because atmospheric pressure is continually changing, autozeroing an absolute pressure sensor requires a reference standard. If the actual absolute pressure is important in an application (such as for a barometer), an external precision reference is needed to set the offset to the correct current value of atmospheric pressure. In applications where the difference between multiple absolute sensors is important, any reference may be used (such as one of the other absolute pressure sensors in a system, or even an arbitrary pressure like 14.7 psia), as long as it is consistent and repeatable. TABLE 13. PRESSURE RANGE SPECIFICATIONS FOR 0 MMHG TO 300 MMHG PRESSURE RANGE (SEE FIGURE 3.) PRESSURE RANGE PMIN. PMAX. UNIT OVER PRESSURE1 BURST PRESSURE2 TOTAL ERROR BAND AFTER CUSTOMER AUTO-ZERO3 (%FSS) TOTAL ERROR BAND, TYPICAL (%FSS) TRANSFER FUNCTION Gage 0300YG 0 300 mmHg 3100 6200 �2.0 �2.5 B 1 Overpressure: The maximum pressure which may safely be applied to the product for it to remain in specification once pressure is returned to the operating pressure range. Exposure to higher pressures may cause permanent damage to the product. Unless otherwise specified this applies to all available pressure ports at any temperature with the operating temperature range. The customer's pressure connection system (tubing or O-rings) must be specified to be equal to, or greater than, the rated overpressure limit. Due to the possibility of light sensitivity, opaque tubing is recommended. 2 Burst Pressure: The maximum pressure that may be applied to any port of the product without causing escape of pressure media. Product should not be expected to function after exposure to any pressure beyond the burst pressure. 3 Total Error Band after Customer Auto-Zero: The maximum deviation from the ideal transfer function over the entire compensated pressure range for a minimum of 24 hours after an auto-zero operation. Includes all errors due to full scale span, pressure non-linearity, pressure hysteresis, and thermal effect on span. Low pressure MPR sensors may exhibit offset shifts after reflow solder. See Technical Note "Auto-Zero Calibration Technique for Pressure Sensors" (008326-1-EN) if this shift is significant in a particular application. Sensing and Internet of Things 11 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES 1.0 GENERAL INFORMATION Please see pages 20-23 for product dimensions, pinouts, tape and reel dimensions, Recommended Pick and Place Geometry, and recommended tubing. 2.0 PINOUT AND FUNCTIONALITY (SEE TABLE 14.) TABLE 14. PINOUT AND FUNCTIONALITY 9 8 7 10 6 11 5 Gage reference hole (gage option only) 12 4 Do not block, keep free of contamination PAD NUMBER NAME 1 SS 2 3 DESCRIPTION Sensor Select: Chip select for SPI sensor 2 MOSI/SDA Master Out Sensor In: Data in for SPI sensor; data in/out for I�C sensor 3 SCLK/SCL Clock input for SPI and I�C sensor 4 VO+ VOUT+ pin in piezoresistive Wheatstone Bridge: Anti-aliasing filter can be connected between VO+ and VO- 5 NC No connection 6 VO- VOUT- pin in piezoresistive Wheatstone Bridge: Anti-aliasing filter can be connected between VO- and VO+ 7 MISO Master In Sensor Out: Data output for SPI sensor 8 EOC End-of-conversion indicator: This pin is set high when a measurement and calculation have been completed and the data is ready to be clocked out Reset: This pin can be connected and used to control safe resetting of the sensor. RES is active-low; 9 RES a VDD-VSS-VDD transition at the RES pin leads to a complete sensor reset 10 VSS Ground reference voltage signal 11 NC No connection 12 VDD Positive supply voltage 3.0 START-UP TIMING On power-up, the MPR Series sensor is able to receive the first command after 1 ms from when the VDD supply is within operating specifications. The MPR Series sensor can begin the first measurement after 2.5 ms from when the VDD supply is operational. Alternatively, instead of a power-on reset, a reset and new power-up sequence can be triggered by an IC-reset signal (high low) at the RES pin. 4.0 POWER SUPPLY REQUIREMENT Verify that system power to the sensor meets the VDD rising slope requirement (minimum VDD rising slope is at least 10 V/ms). If not, use the RES pin to bring the sensor out of reset once the system power has stabilized. 12 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES 5.0 REFERENCE CIRCUIT DESIGN 5.1 I2C AND SPI CIRCUIT DIAGRAMS (SEE FIGURES 5 AND 6.) FIGURE 5. I2C CIRCUIT DIAGRAM VCC 10 kOhm 0.1 �F 10 kOhm GND 12 VDD MPR Series Sensor VO- 6 Optional 1 nF NC 1 SS VO+ 4 Optional 2 MOSI/SDA NC 11 �C 3 SCL/SCLK EOC 8 To �C Optional NC 7 MISO NC 5 RES 9 VSS 10 From �C Optional GND FIGURE 6. SPI CIRCUIT DIAGRAM VCC 0.1 �F GND 12 VDD MPR Series Sensor VO- 6 Optional 1 nF 1 SS VO+ 4 Optional 2 MOSI/SDA NC 11 �C 3 SCL/SCLK EOC 8 To �C Optional 7 MISO NC 5 RES 9 VSS 10 From �C Optional GND 5.2 BYPASS CAPACITOR USE NOTICE Ensure bypass capacitors are integrated into the end user design to ensure output noise suppression. Sensing and Internet of Things 13 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES 6.0 I2C COMMUNICATIONS 6.1 I2C BUS CONFIGURATION (SEE FIGURE 7.) The I2C bus is a simple, serial 8-bit oriented computer bus for efficient I2C (Inter-IC) control. It provides good support for communication between different ICs across short circuit-board distances, such as interfacing microcontrollers with various low speed peripheral devices. For detailed specifications of the I2C protocol, see Rev. 6 (April 2014) of the I2C Bus Specification (source: NXP Semiconductor at https://www.nxp.com/docs/en/user-guide/UM10204.pdf). Each device connected to the bus is software addressable by a unique address and a simple Master/Sensor relationship that exists at all times. The output stages of devices connected to the bus are designed around an open collector architecture. Because of this, pull-up resistors to +VDD must be provided on the bus. Both SDA and SCL are bidirectional lines, and it is important to system performance to match the capacitive loads on both lines. In addition, in accordance with the I2C specification, the maximum allowable capacitance on either line is 400 pF to ensure reliable edge transitions at 400 kHz clock speeds. When the bus is free, both lines are pulled up to +VDD. Data on the I2C bus can be transferred at a rate up to 100 kbit/s in the standard-mode, or up to 400 kbit/s in the fast-mode. FIGURE 7. I2C BUS CONFIGURATION Master (Serial Clock Line) SCL Pull-up resistors Rp +VDD Rp SDA (Serial Data Line) Sensor 1 Sensor 2 Sensor 3 6.2 I2C DATA TRANSFER The MPR Series I2C Sensors will only respond to requests from a Master device. Following the address and read bit from the Master, the MPR Series Sensors are designed to output up to 4 bytes of data. The first data byte is the Status Byte (8-bit) and the second to fourth bytes are the compensated pressure output (24-bit). 6.3 I2C SENSOR ADDRESS Each MPR Series I2C Sensor is referenced on the bus by a 7-bit sensor address. The default address for the MPR Series is 24 (0x18). Other available standard addresses are: 08 (0x08), 40 (0x28), 56 (0x38), 72 (0x48), 88 (0x58), 104 (0x68), 120 (0x78). (Other custom values are available. Please contact Honeywell Customer Service with questions regarding custom Sensor addresses.) 6.4 I2C PRESSURE READING To read out a compensated pressure reading, the Master generates a START condition and sends the Sensor address followed by a read bit (1). After the Sensor generates an acknowledge, it will transmit up to 4 bytes of data. The first data byte is the Status Byte (8-bit) and the second to fourth bytes are the compensated pressure output (24-bit). The Master must acknowledge the receipt of each byte, and can terminate the communication by sending a Not Acknowledge (NACK) bit followed by a Stop bit after receiving the required bytes of data. 14 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES 6.5 I2C STATUS BYTE (SEE TABLE 15.) TABLE 15. I2C STATUS BYTE EXPLANATION BIT (MEANING) STATUS 7 always 0 COMMENT -- 6 (Power indication) 1 = device is powered 0 = device is not powered Needed for the SPI Mode where the Master reads all zeroes if the device is not powered or in power-on reset (POR). 5 (Busy flag) 4 3 2 (Memory integrity/error flag) 1 0 (Math saturation) 1 = device is busy always 0 always 0 0 = integrity test passed 1 = integrity test failed always 0 1 = internal math saturation has occurred Indicates that the data for the last command is not yet available. No new commands are processed if the device is busy. -- -- Indicates whether the checksum-based integrity check passed or failed; the memory error status bit is calculated only during the power-up sequence. -- -- 6.6 I2C COMMUNICATIONS 6.6.1 I2C Output Measurement Command To communicate with the MPR Series I2C output sensor using an Output Measurement Command of "0xAA", followed by "0x00" "0x00", follow the steps shown in Table 16. This command will cause the device to exit Standby Mode and enter Operating Mode. At the conclusion of the measurement cycle, the device will automatically re-enter Standby Mode. TABLE 16. I2C OUTPUT MEASUREMENT COMMAND STEP ACTION S SensorAddr 0 A Command A CmdData <15:8> A CmdData <7:0> A P 1 7-bit Write bit Option 1: Wait until the busy flag in Option 2: Wait for at Option 3: Wait for the the Status Byte clears. least 5 ms for the data EOC indicator. conversion to occur. 2 S SensorAddr 1 A Status N P 7-bit Read bit To read the 24-bit pressure output along with the 8-bit Status Byte: 3 S SensorAddr 1 A Status A SensorDat <23:16> A SensorDat <15:8> A SensorDat <7:0> N P 7-bit Read bit NOTES Master to Sensor Sensor to Master S Start condition P Stop condition A Acknowledge N Not acknowledge Sensing and Internet of Things 15 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES 6.6.2 I2C Sensor Address of 0x18 To communicate with the MPR Series I2C output sensor with an I2C Sensor Address of 0x18 (hex), follow the steps shown in Table 17. TABLE 17. I2C SENSOR ADDRESS OF 0X18 COMMUNICATIONS STEP ACTION 0x18 0 1 S SensorAddr 0 A Command A CmdData <15:8> A CmdData <7:0> AP 0x30 0xAA 0x00 0x00 Write bit Option 1: Wait until the busy flag in Option 2: Wait for at Option 3: Wait for the the Status Byte clears. least 5 ms for the data EOC indicator. conversion to occur. 0x18 1 2 S SensorAddr 1 A Status N P 0x31 Read bit To read the 24-bit pressure output along with the 8-bit Status Byte: 0x18 1 3 S SensorAddr 1 A Status A SensorDat <23:16> A SensorDat <15:8> A SensorDat <7:0> N P 0x31 Read bit NOTES Master to Sensor Sensor to Master S Start condition P Stop condition A Acknowledge N Not acknowledge 6.7 I2C TIMING AND LEVEL PARAMETERS (SEE TABLE 18.) TABLE 18. I2C BUS TIMING DIAGRAM AND PARAMETERS SDA tLOW tSUDAT tHDSTA SCL tHDSTA tHDDAT tHIGH tSUSTA CHARACTERISTIC ABBREVIATION SCLK clock frequency fSCL Start condition hold time relative to SCL edge tHDSTA Minimum SCLK clock low width1 tLOW Minimum SCLK clock high width1 tHIGH Start condition setup time relative to SCL edge tSUSTA Data hold time on SDA relative to SCL edge tHDDAT Data setup time on SDA relative to SCL edge tSUDAT Stop condition setup time on SCL tSUSTO Bus free time between stop condition and start condition tBUS Output level low Outlow Output level high Outhigh Pull-up resistance on SDA and SCL Rp 1Combined low and high widths must equal or exceed minimum SCLK period. MIN. 100 0.1 0.6 0.6 0.1 0 0.1 0.1 2 -- 0.8 1 tBUS TYP. -- -- -- -- -- -- -- -- -- 0 1 -- tSUSTO MAX. 400 -- -- -- -- -- -- -- -- 0.2 -- 50 UNIT kHz s s s s s s s s VDD VDD kOhm 16 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES 7.0 SPI COMMUNICATIONS 7.1 SPI DEFINITION The Serial Peripheral Interface (SPI) is a simple bus system for synchronous serial communication between one Master and one or more Sensors. It operates either in full-duplex or half-duplex mode, allowing communication to occur in either both directions simultaneously, or in one direction only. The Master device initiates an information transfer on the bus and generates clock and control signals. Sensors are controlled by the Master through individual Sensor Select (SS) lines and are active only when selected. The MPR Series SPI sensors operate in full-duplex mode only, with data transfer from the Sensor to the Master. This data transmission uses four, unidirectional bus lines. The Master controls SCLK, MOSI and SS; the Sensor controls MISO. (See Figure 8.) FIGURE 8. SPI BUS CONFIGURATION Data Transmission Lines SCLK: Signal Clock MOSI: Master Out/Sensor In MISO: Master In/Sensor Out SS: Sensor Select Master SCLK MOSI MISO SS1 SS2 SS3 SCLK MOSI Sensor 1 MISO SS SCLK MOSI Sensor 2 MISO SS SCLK MOSI Sensor 3 MISO SS 7.2 SPI DATA TRANSFER Start communication with the MPR Series SPI sensors by de-asserting the Sensor Select (SS) line. At this point, the sensor is no longer idle, and will begin sending data once a clock is received. MPR Series SPI sensors are configured for SPI operation in mode 0 (clock polarity is 0 and clock phase is 0). (See Figure 9.) FIGURE 9. EXAMPLE OF 1 BYTE SPI DATA TRANSFER SCLK MOSI MISO SS MSB Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 LSB MSB Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 LSB Once the clocking begins, the MPR Series SPI sensor is designed to output up to 4 bytes of data. The first data byte is the Status Byte (8-bit) and the second to fourth bytes are the compensated pressure output (24-bit). 7.3 SPI PRESSURE READING To read out a compensated pressure reading, the Master generates the necessary clock signal after activating the sensor with the Sensor Select (SS) line. The sensor will transmit up to 4 bytes of data. The first data byte is the Status Byte (8-bit) and the second to fourth bytes are the compensated pressure output (24-bit). The Master can terminate the communication by stopping the clock and deactivating the SS line. Sensing and Internet of Things 17 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES 7.4 SPI STATUS BYTE The SPI status byte contains the bits shown in Table 19. 7.5 SPI COMMUNICATION To communicate with the MPR Series SPI output sensor using an Output Measurement Command of "0xAA", followed by "0x00" "0x00", follow the steps shown in Table 19. This command will cause the device to exit Standby Mode and enter Operating Mode. At the conclusion of the measurement cycle, the device will automatically re-enter Standby Mode. TABLE 19. SPI OUTPUT MEASUREMENT COMMAND STEP ACTION The data on MISO depend on the preceding command. Discard the data on the MISO line. 0xAA 0x00 0x00 1 MOSI Command other than NOP CmdData CmdData <15:8> <7:0> MISO Status Data Data Option 1: Wait until the Option 2: Wait for at least Option 3: Wait for the EOC busy flag in the Status Byte 5 ms for the data conversion indicator. clears. 0xF0 to occur. 2 MOSI Command = NOP MISO Status To read the 24-bit pressure output along with the 8-bit Status Byte: 0xF0 0x00 0x00 0x00 3 MOSI Command = NOP 00Hex 00Hex 00Hex MISO Status SensorDat SensorDat SensorDat <24:16> <15:8> <7:0> NOTES Master to Sensor Sensor to Master � NOP Command is "0xF0". 7.6 SPI TIMING AND LEVEL PARAMETERS (SEE TABLE 20.) TABLE 20. SPI BUS TIMING DIAGRAM AND PARAMETERS tHDSS tHIGH tLOW SCLK MOSI/MISO HiZ SS tCLKD tCLKD CHARACTERISTIC ABBREVIATION SCLK clock frequency fSCL SS drop to first clock edge tHDSS Minimum SCLK clock low width1 tLOW Minimum SCLK clock high width1 tHIGH Clock edge to data transition tCLKD Rise of SS relative to last clock edge tSUSS Bus free time between rise and fall of SS tBUS Output level low Outlow Output level high Outhigh 1Combined low and high widths must equal or exceed minimum SCLK period. 18 sensing.honeywell.com tSUSS MIN. 50 2.5 0.6 0.6 0 0.1 2 -- 0.8 HiZ tBUS TYP. -- -- -- -- -- -- -- 0 1 MAX. 800 -- -- -- -- -- -- 0.2 -- UNIT kHz s s s s s s VDD VDD MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES 8.0 MPR SERIES SENSOR OUTPUT PRESSURE CALCULATION The MPR Series sensor output can be expressed by the transfer function of the device as shown in Equation 1: Equation 1: Pressure Sensor Transfer Function Output = Outputmax. - Outputmin. Pmax. - Pmin. * (Pressure - Pmin.) + Outputmin. Rearranging this equation to solve for Pressure, we get Equation 2: Equation 2: Pressure Output Function Pressure = (Output - Outputmin.) * (Pmax.- Pmin.) Outputmax. - Outputmin. + Pmin. Where: Outputmax. = output at maximum pressure [counts] Outputmin. = output at minimum pressure [counts] Pmax. = maximum value of pressure range [bar, psi, kPa, etc.] Pmin. = minimum value of pressure range [bar, psi, kPa, etc.] Pressure = pressure reading [bar, psi, kPa, etc.] Output = digital pressure reading [counts] Example: Calculate the pressure for a -1 psi to 1 psi gage sensor with a 10% to 90% calibration, and a pressure output of 14260634 (decimal) counts: Outputmax. = 15099494 counts (90% of 224 counts or 0xE66666) Outputmin. = 1677722 counts (10% of 224 counts or 0x19999A) Pmax. = 1 psi Pmin. = -1 psi Pressure = pressure in psi Output = 14260634 counts Pressure = (14260634-1677722) * (1 - ( - 1)) + (-1) 15099494 - 1677722 Pressure = 25165824 + (-1) 13421772 Pressure = 0.875 psi Sensing and Internet of Things 19 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES FIGURE 10. LONG PORT AND RECOMMENDED PCB PAD LAYOUT DIMENSIONS (FOR REFERENCE ONLY: MM [IN].) Sensor Recommended PCB pad layout 20 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES FIGURE 11. SHORT PORT AND RECOMMENDED PCB PAD LAYOUT DIMENSIONS (FOR REFERENCE ONLY: MM [IN].) Sensor Reflowable protective silicone cap Recommended PCB pad layout Sensing and Internet of Things 21 MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES FIGURE 12. TAPE AND REEL DIMENSIONS (FOR REFERENCE ONLY: MM.) Long Port Tape Short Port Tape Reel 22 sensing.honeywell.com MICROPRESSURE BOARD MOUNT PRESSURE SENSORS, MPR SERIES REFLOWABLE PROTECTIVE SILICONE CAP Every short port MPR Series sensor is shipped with a reflowable protective silicone cap intended to protect the sensor's protective gel throughout the assembly process (see Figure 11). This cap can withstand lead-free, reflow temperatures and is intended to be removed after the end-user has completed assembly of the MPR sensor to the mating assembly. REFLOWABLE PROTECTIVE SILICONE CAP REMOVAL Removal of the cap may easily be done manually using ESD-safe tweezers; however, if possible, and to eliminate possible sensor protective gel damage, the cap removal process should be done in a semi-automated or automated manner. If the cap must be removed manually, follow this removal process: � Using ESD-safe tweezers, grasp the silicone cap midway up the straight port and lift the cap up vertically until it is no longer supported by the sensor housing. � At this point, stop the vertical movement and relieve the grasp of the tweezers. � Regrasp the cap in the unsupported area and continue the vertical movement until the cap is free and clear of the sensor's protective gel. � Ensure that the sensor's protective gel is not damaged during the cap removal process. RECOMMENDED TUBING See Table 21 for recommended tubing information. RECOMMENDED O-RINGS See Figure 13 and Table 22 for O-Ring location, size and recommended part numbers. TABLE 21. RECOMMENDED TUBING MANUFACTURER TYPE Frelin-Wade Frelin-Wade NewAge Industries NewAge Industries Fre-Thane� (polyurethane) nylon PVC silicone PART NUMBER 1A-156-11 1A-200-01 1100225 2800315 ID (IN) 0.093 0.093 0.094 0.094 OD (IN) 0.156 0.125 0.156 0.156 FIGURE 13. RECOMMENDED MANIFOLD DESIGN FOR SHORT PORT SENSOR WITH O-RING PRESSURE AT 25�C (PSI) 210 270 42 20 TABLE 22. RECOMMENDED O-RINGS ID (MM) CROSS SECTION (WIDTH) (MM) 4.00 2.00 4.00 2.00 4.00 2.00 4.00 2.00 4.00 2.00 4.00 2.00 4.00 2.00 SUPPLIER McMaster McMaster McMaster McMaster McMaster McMaster McMaster PART NUMBER 9262K163 1174N421 1185N82 9263K163 5233T47 1295N222 1278N15 MATERIAL HARDNESS Buna-N Buna-N Viton� Fluoroelastomer Viton� Fluoroelastomer Silicone Viton� Fluoroelastomer Kalrez 4079 Durometer 70A Durometer 50A Durometer 75A Durometer 75A Durometer 70A Durometer 75A Durometer 75A Sensing and Internet of Things 23 ADDITIONAL MATERIALS The following associated literature is available at sensing.honeywell.com: � Product range guide � Application information � CAD models � Product images FOR MORE INFORMATION Honeywell Sensing and Internet of Things services its customers through a worldwide network of sales offices and distributors. For application assistance, current specifications, pricing or the nearest Authorized Distributor, visit sensing.honeywell.com or call: USA/Canada +1 302 613 4491 Latin America +1 305 805 8188 Europe +44 1344 238258 Japan +81 (0) 3-6730-7152 Singapore +65 6355 2828 Greater China +86 4006396841 WARRANTY/REMEDY Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship during the applicable warranty period. Honeywell's standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgment or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items that Honeywell, in its sole discretion, finds defective. The foregoing is buyer's sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages. While Honeywell may provide application assistance personally, through our literature and the Honeywell web site, it is buyer's sole responsibility to determine the suitability of the product in the application. Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this writing. However, Honeywell assumes no responsibility for its use. m WARNING PERSONAL INJURY DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. Failure to comply with these instructions could result in death or serious injury. m WARNING MISUSE OF DOCUMENTATION � The information presented in this product sheet is for reference only. Do not use this document as a product installation guide. � Complete installation, operation, and maintenance information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in death or serious injury. Honeywell Sensing and Internet of Things 830 East Arapaho Road Richardson, TX 75081 sensing.honeywell.com Fre-Thane� is a registered trademark of Freelin-Wade Co. Viton� is a registered trademark The Chemours Company. 32332628-H-EN | H | 10/20 �2020 Honeywell International Inc. All rights reserved.