Sierra Wireless WP76A Radio Module User Manual AirPrime WP7601 Hardware Integration Guide

Sierra Wireless Inc. Radio Module AirPrime WP7601 Hardware Integration Guide

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41111210 WP7601 Hardware Integration Guide r1

AirPrime WP7601Hardware Integration Guide41111210Rev 1

Hardware Integration GuideRev 1 Jul 17 2 41111210Important NoticeDue to the nature of wireless communications, transmission and reception of data can never be guaranteed. Data may be delayed, corrupted (i.e., have errors) or be totally lost. Although significant delays or losses of data are rare when wireless devices such as the Sierra Wireless modem are used in a normal manner with a well-constructed network, the Sierra Wireless modem should not be used in situations where failure to transmit or receive data could result in damage of any kind to the user or any other party, including but not limited to personal injury, death, or loss of property. Sierra Wireless accepts no responsibility for damages of any kind resulting from delays or errors in data transmitted or received using the Sierra Wireless modem, or for failure of the Sierra Wireless modem to transmit or receive such data.Safety and HazardsDo not operate the Sierra Wireless modem in areas where blasting is in progress, where explosive atmospheres may be present, near medical equipment, near life support equipment, or any equipment which may be susceptible to any form of radio interference. In such areas, the Sierra Wireless modem MUST BE IN AIRPLANE MODE OR POWERED OFF. The Sierra Wireless modem can transmit signals that could interfere with this equipment.Do not operate the Sierra Wireless modem in any aircraft, whether the aircraft is on the ground or in flight. In aircraft, the Sierra Wireless modem MUST BE IN AIRPLANE MODE OR POWERED OFF. When operating, the Sierra Wireless modem can transmit signals that could interfere with various onboard systems.Note: Some airlines may permit the use of cellular phones while the aircraft is on the ground and the door is open. Sierra Wireless modems may be used at this time.The driver or operator of any vehicle should not operate the Sierra Wireless modem while in control of a vehicle. Doing so will detract from the driver or operator's control and operation of that vehicle. In some states and provinces, operating such communications devices while in control of a vehicle is an offence.Limitation of LiabilityThe information in this manual is subject to change without notice and does not represent a commitment on the part of Sierra Wireless. SIERRA WIRELESS AND ITS AFFILIATES SPECIFICALLY DISCLAIM LIABILITY FOR ANY AND ALL DIRECT, INDIRECT, SPECIAL, GENERAL, INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS OR REVENUE OR ANTICIPATED PROFITS OR REVENUE ARISING OUT OF THE USE OR INABILITY TO USE ANY SIERRA WIRELESS PRODUCT, EVEN IF SIERRA WIRELESS AND/OR ITS AFFILIATES HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR THEY ARE FORESEEABLE OR FOR CLAIMS BY ANY THIRD PARTY.Notwithstanding the foregoing, in no event shall Sierra Wireless and/or its affiliates aggregate liability arising under or in connection with the Sierra Wireless product, regardless of the number of events, occurrences, or claims giving rise to liability, be in excess of the price paid by the purchaser for the Sierra Wireless product.

Rev 1 Jul 17 4 41111210ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Module Power States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6RF Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Conducted Tx power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Routing Constraints and Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8General Rules and Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8PCB Layout Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9PCB Specifications for the Application Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Recommended PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Routing Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9UIM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10RF Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10USB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Thermal Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11EMC and ESD Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Mechanical Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Signal Reference Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Regulatory Compliance and Industry Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . .15Important Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Safety and Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Important Compliance Information for North American Users . . . . . . . . . . . . . . . . . . . 15

Rev 1 Jul 17 5 4111121011: IntroductionThe AirPrime WP7601 is an industrial-grade LGA 239-pad module that provides voice and data connectivity on LTE networks. The module also provides GNSS functionality as a SKU-configuration.AccessoriesA hardware development kit is available for AirPrime WP-series modules. The kit contains hardware components for evaluating and developing with the module, including:•Development board•Cables•Antennas (Additional antennas may be required to support all bands.)•Other accessories

Rev 1 Jul 17 6 4111121022: PowerPower SupplyThe host provides power to the AirPrime WP7601 through multiple power and ground pins. The host must provide safe and continuous power at all times; the module does not have an independent power supply, or protection circuits to guard against electrical issues.For detailed pinout and voltage/current requirements of this module, see the AirPrime WP76XX Product Technical Specification.Module Power StatesThe module has three main power states, as described in Table 2-1.Table 2-1: Supported Power StatesState Description Wake-Up EventsOFF Module is off (no power to the system).Apply power for system to go to Active state.Apply power.Interrupt Simple wakeup sources are configured to interrupt from this power-saving state to the Active state. An event generated from a state change of RESET_IN_N or POWER_ON_N, or a timeout event.Active The module may be fully functioning (WWAN radio and GNSS radio active), or be operating in airplane mode (WWAN radio off). Module actively reduces power consumption by disabling components that are not in use (for example, stepping down clock signals, putting USB bus into selective suspend, etc.)System wakes up (returns to fully active mode) automatically as required, or can be woken directly via wakeable GPIOs.

Rev 1 Jul 17 7 4111121033: RF SpecificationsThe AirPrime WP7601 operates on the frequency bands listed below. Conducted Tx power Table 3-1: LTE Frequency Band SupportBand Frequency (Tx) (MHz) Frequency (Rx) (MHz)B4 1710–1755 2110–2155B13 777–787 746–756Table 3-2: GNSS Frequency Band SupportBand Frequencies (MHz)GPS 1575.42 ± 1.023GLONASS 1597.52–1605.92Galileo 1575.42 ± 2.046BeiDou 1561.098 ± 2.046Table 3-3: Conducted Tx Max Output Power Tolerances—LTERF band Min (dBm) Typ (dBm) Max (dBm) NotesB4 22 23 24 Connectorized (Class 3)B13 22 23 24 Connectorized (Class 3)

Rev 1 Jul 17 8 4111121044: Routing Constraints and Recommen-dationsThis section describes general routing constraints and recommendations for the AirPrime WP7601 module.Note: This is a non-exhaustive list of suggested design guidelines. The developer is respon-sible for deciding whether to implement these guidelines.General Rules and RecommendationsClock and other high-frequency digital signals (e.g. serial buses) should be routed as far as possible from the module’s analog signals.If the application design makes it possible, all analog signals should be separated from digital signals by a ground trace on the PCB.Tip: Avoid routing any signals under the module on the application board.PCB Layout RecommendationsGround pads should be re-flowed on to the host PCB with < 30% voiding to allow effective heat dissipation.Power SupplyWhen designing the power supply, make sure that VBAT_BB/VBAT_RF meet the requirements listed in the AirPrime WP76XX Product Technical Specification.Careful attention should be paid to the following:•Power supply quality—PFM, or PSM systems should be avoided; Low ripple, linear regulation or PWM converters are preferred for low noise.•Capacity to deliver high current peaks in a short time (for pulsed radio emission)•VBAT_BB/VBAT_RF must support peak currents with an acceptable voltage drop that guarantees the minimum required VBAT_BB/VBAT_RF value.•VBAT_BB/VBAT_RF signal pads must never exceed the maximum required VBAT_BB/VBAT_RF value, otherwise the module’s power amplifier and GPS chipset may be severely damaged.•A weakly-designed (not robust) power supply could affect EMC performance, the emission spectrum, and the phase error and frequency error.

Routing Constraints and RecommendationsRev 1 Jul 17 9 41111210AntennaSierra Wireless strongly recommends working with an antenna manufacturer either to develop an antenna adapted to the application, or to adapt an existing solution to the application.For information on routing constraints for the RF circuit, see RF Circuit on page 10.PCB Specifications for the Application BoardSensitive signals (such as audio, UIM, and clocks) should be protected by ground planes/fills. Routing sensitive signals close to noisy signals could result in noise being coupled.Recommended PCB Land PatternRefer to AirPrime WPx5/WP76 Series Customer Process Guidelines, available at http://source.sierrawireless.com.Routing ConstraintsPower SupplyIf the following design recommendations are not followed, phase error (peak) and power loss could occur.•Since the maximum peak current can reach 2.5 A, Sierra Wireless strongly recommends having a large width for the layout of the power supply signal (to avoid voltage loss between the external power supply and VBAT_BB/VBAT_RF.Figure 4-1: Power Supply Routing Example

Hardware Integration GuideRev 1 Jul 17 10 41111210Note: Figure 4-1 shows separate traces for VBAT_BB and VBAT_RF. If VBAT_BB and VBAT_RF share a single power supply, these traces should be connected.Note: For optimal decoupling, place the capacitors on the underside of the board, directly under the pins.•Filtering capacitors (100 nF to 1500 F) are recommended near the module’s power supply.•Attention should be paid to the ground trace or the ground plane on the appli-cation board for the power supply that supplies the module. The ground trace or ground plane, as well as the VBAT trace, must be able to support current peaks.•If the ground trace between the module and the power supply is a copper plane, make sure it is a solid plane.•Design routing to make sure total line impedance does not exceed 10 m@217Hz.Ground Plane ConnectionThe AirPrime WP7601 module requires a solid, central ground plane (with solder mask defined pads) located directly under the module. This will:•Ensure high current signal returns•Provide heat dissipation under higher operating temperaturesThe ground plane should be connected (with vias) to the reference ground layer of the application board.UIM Interface•The length of the tracks between the AirPrime WP7601 and the UIM socket should be as short as possible. Maximum recommended length is 10cm.•ESD protection is mandatory on the UIM lines unless there is no physical access to the UIM.•The decoupling capacitor(s) should be placed as close as possible to the UIM card connector for the UIM1_VCC signal.RF CircuitThe RF signal must be routed on the application board using tracks with a 50 characteristic impedance.The characteristic impedance depends on the dielectric, the track width and the ground plane spacing.It is recommended to use stripline design if the RF path is fairly long (more than 3 cm), since microstrip design is not shielded. Consequently, the RF (transmit) signal may interfere with neighboring electronic circuits. In the same way, the neighboring electronics (micro-controllers, etc.) may interfere with the RF (receive) signal and degrade the reception performance.

Routing Constraints and RecommendationsRev 1 Jul 17 11 41111210USB InterfaceWhen the USB interface is externally accessible, ESD protection is required on the USB_VBUS, USB_D+, and USB_D- signals.Thermal ConsiderationsWhen transmitting, the AirPrime WP7601 can generate significant amounts of heat (due to the internal Power Amplifier) that must be dissipated in the host device for safety and performance reasons.The amount of thermal dissipation required depends on the following factors:•Supply voltage—Maximum power dissipation for these modules can be up to 3 W at voltage supply limits.•Usage—Typical power dissipation values depend on the location within the host, amount of data transferred, etc.To enhance heat dissipation:•Maximize airflow over / around the module•Locate the module away from other components that generate heat•Ensure the module is connected to a solid ground planeEMC and ESD RecommendationsEMC tests must be performed on the application as soon as possible to detect any potential problems.When designing, special attention should be paid to:•Possible spurious emissions radiated by the application to the RF receiver in the receiver band•ESD protection—Typically, ESD protection is mandatory for externally acces-sible signals, including:·VBAT_RF/VBAT_BB·UIM (if accessible from outside)·Serial link·USB·Antennas•Length of the UIM interface lines (preferably <10 cm)•Length of the HSIC interface lines (<10 cm, as required by the HSIC specifi-cation)•EMC protection on audio input/output (filters against 900 MHz emissions)•Ground plane: Sierra Wireless recommends a common ground plane for analog/digital/RF groundsNote: The AirPrime WP7601 does not include any protection against over-voltage.The host device must provide adequate ESD protection on digital circuits and antenna ports as detailed in the following table.

Hardware Integration GuideRev 1 Jul 17 12 41111210Note: The level of protection required depends on your application.Mechanical IntegrationAttention should be paid to:•Antenna cable integration (bending, length, position, etc)•Pads of the AirPrime WP7601 to be soldered to the ground plane•Ensuring proper board layout•Providing sufficient space around the module for heat dissipationTable 4-1: ESD specifications a,ba. ESD specifications are preliminary, subject to change.b. ESD protection is highly recommended at the point where the UIM contacts are exposed, and for any other signals that would be subjected to ESD by the user.Category Connection SpecificationOperational RF portsUIM connectorUSB connectorUART connectorIEC-61000-4-2 - Level (Electrostatic Discharge Immunity Test)·± 6kV Contact·± 8kV AirNon-operational Host connector interface Unless otherwise specified:•JESD22-A114 ± 1kV Human Body Model•JESD22-A115 ± 100V Machine Model•JESD22-C101C ± 500V Charged Device Model

Routing Constraints and RecommendationsRev 1 Jul 17 13 41111210Signal Reference SchematicsFigure 4-2: UIM InterfaceFigure 4-3: USB Interface000010nF0100nF10C3C2C19C7C6C5 GNDVPPI/OSW_AVCCRSTCLKSW_BDNIDNIDNIVGPIO_1V8UIM_RESET_NUIM_DATA UIM_CLKUIM_VCCUIM1_DETUIM1DNISIM2070-6-0-30-00-AESD suppressorNote: Example ESD and SIM connector part numbers listed. Comparable parts may be used instead.Note: Capacitor on UIM_CLK is intended to slow down the clock signal in case of crosstalk.DNIDNIExample ESD suppressor:STMicroelectronicsDALC208SC6 +uClamp 3301P123465Important: SIM connector must have a ‘Normally closed’ detection switch.

Hardware Integration GuideRev 1 Jul 17 14 41111210Figure 4-4: USB OTG Interface215346642571351K5%51K5%51K5%4701%NC1 VCCNC2 GNDAYVCC_1V8VCC_5V0USB_IDDNIVCC_1V810µFUSB_VBUSVIN VOUTFLAGB ISETONGND1 GND2Replace with FPF2163 if Autorestart is requiredFPF2164

Rev 1 Jul 17 15 4111121055: Regulatory Compliance and Industry CertificationsImportant NoticeDue to the nature of wireless communications, transmission and reception of data can never be guaranteed. Data may be delayed, corrupted (i.e., have errors) or be totally lost. Although significant delays or losses of data are rare when wireless devices such as the Sierra Wireless modem are used in a normal manner with a well-constructed network, the Sierra Wireless modem should not be used in situations where failure to transmit or receive data could result in damage of any kind to the user or any other party, including but not limited to personal injury, death, or loss of property. Sierra Wireless accepts no responsibility for damages of any kind resulting from delays or errors in data transmitted or received using the Sierra Wireless modem, or for failure of the Sierra Wireless modem to transmit or receive such data.Safety and HazardsDo not operate your AirPrime WP7601 Embedded Module:•In areas where blasting is in progress•Where explosive atmospheres may be present including refueling points, fuel depots, and chemical plants•Near medical equipment, life support equipment, or any equipment which may be susceptible to any form of radio interference.In such areas, the AirPrime WP7601 modem MUST BE POWERED OFF. Otherwise, the AirPrime WP7601 modem can transmit signals that could interfere with this equipment.In an aircraft, the AirPrime WP7601 modem MUST BE POWERED OFF. Otherwise, the AirPrime WP7601 modem can transmit signals that could interfere with various onboard systems and may be dangerous to the operation of the aircraft or disrupt the cellular network. Use of a cellular phone in an aircraft is illegal in some jurisdictions. Failure to observe this instruction may lead to suspension or denial of cellular telephone services to the offender, or legal action or both.Some airlines may permit the use of cellular phones while the aircraft is on the ground and the door is open. The AirPrime WP7601 modem may be used normally at this time.Important Compliance Information for North American UsersThe AirPrime WP7601 module has been granted modular approval for mobile applications. Integrators may use the AirPrime WP7601 module in their end products without additional FCC/IC (Industry Canada) certification if they meet the following conditions. Otherwise, additional FCC/IC approvals must be obtained.

Hardware Integration GuideRev 1 Jul 17 16 411112101. The end product must use the RF trace design approved with the AirPrime WP7601 module. The Gerber file of the trace design can be obtained from Sierra Wireless upon request.2. At least 20 cm separation distance between the antenna and the user’s body must be maintained at all times.3. To comply with FCC/IC regulations limiting both maximum RF output power and human exposure to RF radiation, the maximum antenna gain including cable loss in a mobile-only exposure condition must not exceed the limits stipulated in Table 5-1 on page 16. 4. The AirPrime WP7601 module may transmit simultaneously with other collo-cated radio transmitters within a host device, provided the following conditions are met:·Each collocated radio transmitter has been certified by FCC/IC for mobile application.·At least 20 cm separation distance between the antennas of the collocated transmitters and the user’s body must be maintained at all times.·The radiated power of a collocated transmitter must not exceed the EIRP limit stipulated in Table 5-2.5. A label must be affixed to the outside of the end product into which the AirPrime WP7601 module is incorporated, with a statement similar to the following:· This device contains FCC ID: N7NWP76A / IC:2417C-WP76A.Table 5-1: WP7601 Antenna Gain SpecificationsDevice Technology Band Frequency(MHz)Maximum antenna gain (dBi)AirPrime WP7601 LTE 41710–1755 613 777–787 6Table 5-2: Collocated Radio Transmitter SpecificationsDevice Technology Frequency(MHz) EIRP Limit(dBm)Collocated transmittersaa. Valid collocated transmitter combinations: WLAN+BT; WiMAX+BT.(WLAN+WiMAX+BT is not permitted.)WLAN 2400–2500 255150–5850 27WiMAX 2300–2400 252500–2700 253300–3800 25BT 2400–2500 15

Regulatory Compliance and Industry CertificationsRev 1 Jul 17 17 411112106. A user manual with the end product must clearly indicate the operating requirements and conditions that must be observed to ensure compliance with current FCC/IC RF exposure guidelines.The end product with an embedded AirPrime WP7601 module may also need to pass the FCC Part 15 unintentional emission testing requirements and be properly authorized per FCC Part 15.Note: If this module is intended for use in a portable device, you are responsible for separate approval to satisfy the SAR requirements of FCC Part 2.1093 and IC RSS-102.