Texas Dem Pcm2912A Evm Users Manual User's Guide
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DEM-PCM2912A EVM sbau141
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DEM-PCM2912A EVM User's Guide Literature Number: SBAU141 January 2009 2 SBAU141 – January 2009 Submit Documentation Feedback Contents Preface ............................................................................................................................... 7 1 1.1 1.2 1.3 2 2.1 2.2 2.3 3 3.1 3.2 3.3 4 4.1 4.2 4.3 ................................................................................................................ 9 Introduction—PCM2912A ................................................................................................ 10 1.1.1 Key Features ....................................................................................................... 10 Pin Assignments and Terminal Functions .............................................................................. 11 Functional Block Diagram ................................................................................................. 13 Description ......................................................................................................... 15 Electrostatic Discharge Warning ......................................................................................... 16 Block Diagram .............................................................................................................. 16 Interface and Connections ................................................................................................ 16 Getting Started ........................................................................................................... 17 Basic Operating Set-Up—Windows Vista ............................................................................... 18 3.1.1 Basic Setup Before Evaluation .................................................................................. 18 3.1.2 Volume and Mute Settings ....................................................................................... 19 3.1.3 Sampling Frequency .............................................................................................. 21 Basic Operating Set-Up—Windows XP ................................................................................. 23 3.2.1 Basic Setup Before Evaluation .................................................................................. 23 3.2.2 Volume Settings ................................................................................................... 24 Basic Operating Set-Up—Mac OS ....................................................................................... 27 3.3.1 Basic Setup Before Evaluation .................................................................................. 27 3.3.2 Volume Settings ................................................................................................... 29 3.3.3 Sampling Frequency .............................................................................................. 30 Set-Up Guide ................................................................................... 33 Measurements for Dynamic Characteristics ............................................................................ 34 Playback Performance..................................................................................................... 34 Recording Performance ................................................................................................... 36 Evaluation and Measurements ............................................................... 37 5 Schematic, PCB Layout, and Bill of Materials 5.1 Schematics .................................................................................................................. 38 5.2 Printed Circuit Board Layout .............................................................................................. 39 5.3 Component List ............................................................................................................. 40 Important Notices ............................................................................................................... 42 SBAU141 – January 2009 Submit Documentation Feedback Contents 3 www.ti.com List of Figures 1-1 1-2 2-1 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16 4-1 4-2 4-3 5-1 5-2 5-3 5-4 4 PCM2912A Pin Assignments ............................................................................................. DEM-PCM2912A EVM Functional Block Diagram ..................................................................... DEM-PCM2912A EVM Block Diagram .................................................................................. Sound—Playback Tab (Windows Vista)................................................................................. Sound—Recording Tab (Windows Vista) ............................................................................... Speakers Properties—Levels Tab (Windows Vista) ................................................................... Microphone Properties—Levels Tab (Windows Vista) ................................................................ Speakers Properties—Advanced Tab (Windows Vista) ............................................................... Microphone Properties—Advanced Tab (Windows Vista) ............................................................ Sound and Audio Devices Properties—Audio Tab (Windows XP) .................................................. Sound and Audio Devices Properties—Volume Tab (Windows XP) ................................................ Speaker Window for Volume Setting (Windows XP) .................................................................. Sound and Audio Devices Properties—Audio Tab (Windows XP) .................................................. Microphone Volume Windows for Record Volume Setting (Windows XP) ......................................... Sound—Input Tab (Mac OS) ............................................................................................. Sound—Output Tab (Mac OS) ........................................................................................... Audio Midi Setting Window (Mac OS) ................................................................................... QuickTime Audio Recording Controls ................................................................................... Audio Midi Setting Window (Mac OS) ................................................................................... DEM-PCM2912A EVM Configuration for Playback Performance Measurement .................................. DEM-PCM2912A EVM Configuration for Recording Performance Measurement when Recording Data ...... DEM-PCM2704EVM Configuration for Recording Performance Measurement with Recorded Data ........... DEM-PCM2912A EVM Schematic ....................................................................................... DEM-PCM2912A EVM Board Layout—Silkscreen .................................................................... DEM-PCM2912A EVM Board Layout—Component Side ............................................................. DEM-PCM2912A EVM Board Layout—Inner View .................................................................... List of Figures 11 13 16 18 18 19 20 21 22 23 24 25 25 26 27 28 29 30 31 34 36 36 38 39 39 39 SBAU141 – January 2009 Submit Documentation Feedback www.ti.com List of Tables 1-1 2-1 4-1 4-2 4-3 4-4 5-1 PCM2912A Terminal Functions .......................................................................................... DEM-PCM2912A EVM Connectors ...................................................................................... Line Output Playback Performance ...................................................................................... 32-Ω Headphone Output Playback Performance ...................................................................... 16-Ω Headphone Output Playback Performance ...................................................................... Line Input Recording Performance....................................................................................... Bill of Materials ............................................................................................................. SBAU141 – January 2009 Submit Documentation Feedback List of Tables 11 16 35 35 35 36 40 5 6 List of Tables SBAU141 – January 2009 Submit Documentation Feedback Preface SBAU141 – January 2009 Read This First About This Manual This document provides the information needed to set up and operate the DEM-PCM2912A EVM evaluation module, a test platform for the 16-bit, mono microphone input and stereo headphone output, single-chip PCM2912A stereo audio coder/decoder (codec) with a universal serial bus (USB) interface. For a more detailed description of the PCM2912A product line, refer to the product data sheet available from the Texas Instruments web site at http://www.ti.com. Support documents are listed in the section of this guide entitled Related Documentation from Texas Instruments. How to Use This Manual Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with the DEM-PCM2912A EVM. Chapter 1 gives an overview of the PCM2912A USB interface codec. The EVM block diagram and primary features are also discussed. Chapter 2 provides general information regarding EVM handling and unpacking, absolute operating conditions, and the default switch and jumper configuration. Chapter 3 is the hardware and software setup guide for the EVM, providing all of the necessary information needed to configure the EVM under various PC operating systems for product evaluation. Chapter 4 discusses how to configure the DEM-PCM2912A EVM motherboard for performance evaluation using an audio analyzer. Chapter 5 includes the EVM electrical schematic, printed circuit board (PCB) layout, and the bill of materials. Information About Cautions and Warnings This document contains caution statements. CAUTION This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software or equipment. The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully. Macintosh, QuickTime are registered trademarks of Apple Incorporated. SYS-2722 is a registered trademark of Audio Precision, Inc. Windows, Windows Vista, Windows XP are registered trademarks of Microsoft Corporation. All other trademarks are the property of their respective owners. SBAU141 – January 2009 Submit Documentation Feedback Read This First 7 Related Documentation From Texas Instruments www.ti.com Related Documentation From Texas Instruments The following documents provide information regarding Texas Instruments integrated circuits used in the assembly of the DEM-PCM2912A EVM. These documents are available from the TI web site. The last character of the literature number corresponds to the document revision that is current at the time of the writing of this User’s Guide. Newer revisions may be available from the TI web site at http://www.ti.com/ or call the Texas Instruments Literature Response Center at (800) 477–8924 or the Product Information Center at (972) 644–5580. When ordering, identify the document(s) by both title and literature number. Data Sheet Literature Number PCM2912A Product data sheet SLES230 If You Need Assistance If you have questions regarding either the use of this evaluation module or the information contained in the accompanying documentation, please contact the Texas Instruments Product Information Center at (972) 644–5580 or visit the TI web site at www.ti.com. FCC Warning This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense is required to take whatever measures may be required to correct this interference. Trademarks All trademarks are the property of their respective owners. 8 Read This First SBAU141 – January 2009 Submit Documentation Feedback Chapter 1 SBAU141 – January 2009 Description The DEM-PCM2912A EVM is a complete evaluation platform for the 16-bit, mono microphone input and stereo headphone output PCM2912A bus-powered audio codec with a USB interface. All necessary connectors and circuitry are provided for interfacing to audio test systems and commercial audio equipment. A USB connector is mounted on the DEM-PCM2912A EVM. Stereo audio output and mono audio input are available on two stereo mini-jacks. Topic 1.1 1.2 1.3 .................................................................................................. Page Introduction—PCM2912A .......................................................... 10 Pin Assignments and Terminal Functions .................................... 11 Functional Block Diagram .......................................................... 13 SBAU141 – January 2009 Submit Documentation Feedback Description 9 Introduction—PCM2912A 1.1 www.ti.com Introduction—PCM2912A The PCM2912A is an audio codec with a USB interface for a USB headset, USB headphones, and a USB audio interface box that integrates mono input, stereo headphone output, an analog loopback line, a programmable gain amplifier (PGA), and microphone bias. It is available in a 32-pin TQFP package. The DEM-PCM2912A EVM also carries the Microsoft Windows® Logo License certification from the Microsoft Windows Hardware Quality Labs (WHQL). The DEM-PCM2912A has successfully passed the Microsoft WLP test (DTM Audio) for Windows Vista® x86/x64 platforms. 1.1.1 Key Features Major features of the PCM2912A include: • Analog Front End: – Microphone amplifier (+20 dB gain) – Mono input • Analog Back End: – Stereo/Mono headphone amplifier or line output with volume • Analog Performance: – Dynamic range: 90 dB (DAC) – Dynamic range: 90 dB (ADC) – 25-mW headphone output at RL = 16 Ω • Power-Supply Voltage – Single power supply of 5.0 V (VBUS) • Low Power Dissipation: – 425 mW at analog-to-digital converter (ADC) and digital-to-analog converter (DAC) operation, 44.1 kHz – 0.8 mW in Suspend mode • Sampling Frequency: 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz for ADC and DAC • Programmable Function: – –76-dB to 0-dB gain for analog outputs – –12-dB to +30-dB gain for analog inputs – –76-dB to 0-dB gain for sidetone – 0-dB/20-dB gain for microphone amplifier – High-pass filter: 0.078 ×fS cutoff frequency • Package: 32-pin TQFP • Operating Temperature Range: –25°C to +85°C 10 Description SBAU141 – January 2009 Submit Documentation Feedback Pin Assignments and Terminal Functions www.ti.com 1.2 Pin Assignments and Terminal Functions Figure 1-1 shows the pin assignments for the PCM2912A. Table 1-1 lists the terminal functions. POWER MAMP VOUTR VCCR HGND VCCL VOUTL MBIAS PCM2912APJT (Top View) 24 23 22 21 20 19 18 17 PGND 25 16 VIN VCCP 26 15 VCCA TEST1 27 14 NC 13 AGND 12 VCOM2 TEST0 28 PCM2912APJT (32-pin TQFP) SSPND 29 MMUTE 11 VCOM1 30 1 2 3 4 5 6 7 8 DGND XTO XTI FL VDD 9 D+ 32 PLAY D- FR VBUS 10 BGND REC 31 Figure 1-1. PCM2912A Pin Assignments Table 1-1. PCM2912A Terminal Functions TQFP-36 Terminal I/O BGND 1 – Reference for internal regulator VBUS 2 – Connect to USB power (VBUS) D– 3 I/O USB differential input/output minus D+ 4 I/O USB differential input/output plus VDD 5 – DGND 6 XTO 7 XTI FL Name Description Digital power supply Digital ground O Crystal oscillator output 8 I Crystal oscillator input 9 – External filter pin of left channel (optional) FR 10 – External filter pin of right channel (optional) VCOM1 11 – Common voltage for ADC, DAC and analog front-end (VCCA/2). Decoupling capacitor should be connected to AGND. VCOM2 12 – Common voltage for headphone (VCCA/2). Decoupling capacitor should be connected to AGND. AGND 13 – Analog ground NC 14 – Not connected VCCA 15 – Analog power supply VIN 16 I ADC microphone input MBIAS 17 O Microphone bias output (0.75 VCCA) VOUTL 18 O Headphone output for L-channel VCCL 19 – Analog power supply for headphone amplifier of L-channel HGND 20 – Analog ground for headphone amplifier SBAU141 – January 2009 Submit Documentation Feedback Description 11 Pin Assignments and Terminal Functions www.ti.com Table 1-1. PCM2912A Terminal Functions (continued) TQFP-36 Terminal I/O VCCR 21 -– Analog power supply for headphone amplifier of R-channel VOUTR 22 O Headphone output for R-channel MAMP 23 I Microphone preamplifier gain control (LOW: Preamplifier off; HIGH: Preamplifier on = +20 dB) POWER 24 I Power consumption declaration select pin (LOW: 100 mA; HIGH: 500 mA) PGND 25 – Analog ground for microphone bias, microphone amplifier, and PGA VCCP 26 – Analog power supply for PLL TEST1 27 I Test pin. Must be set to high. TEST0 28 I Test pin. Must be set to low. SSPND 29 O Suspend flag (LOW: Suspend; HIGH: Operational state) MMUTE 30 I Microphone mute control, active high (LOW: Mute off; HIGH: Mute on) REC 31 O Status output for record (LOW: Record; FLASH: Mute on record; HIGH: Stop) PLAY 32 O Status output for playback (LOW: Playback; FLASH: Mute on playback; HIGH: Stop) Name 12 Description Description SBAU141 – January 2009 Submit Documentation Feedback Functional Block Diagram www.ti.com 1.3 Functional Block Diagram Figure 1-2 illustrates the functional block diagram of the DEM-PCM2912A EVM. MIC Bias MBIAS VIN BGND VCCA/VCCP/VCCL/VCCR/VDD VREF 5 V to 3.3 V Voltage Regulator PGA +30 dB to -12 dB in 1-dB steps MIC Amp AGND/HGND/PGND/DGND Power Manager VBUS D+ FIFO ADC ISO-in endpoint Selector VCOM1 S HP AMP 15 mW (at 32 W) ATT 0 dB to -76 dB in 1-dB steps with Mute MMUTE ISO-out endpoint USB protocol controller FL FR PLL (x16) POWER PLAY FIFO S D- MAMP Selector DAC VOUTR Control endpoint Analog PLL ATT 0 dB to -76 dB in 1-dB steps with Mute XCVR USB SIE Analog PLL VCOM2 VOUTL SSPND 96 MHz REC TEST0 TEST1 Tracker â (SpAct ) 6.000 MHz XTO XTI Figure 1-2. DEM-PCM2912A EVM Functional Block Diagram SBAU141 – January 2009 Submit Documentation Feedback Description 13 14 Description SBAU141 – January 2009 Submit Documentation Feedback Chapter 2 SBAU141 – January 2009 Getting Started This chapter provides information regarding handling and unpacking the DEM-PCM2912A EVM, as well as the EVM absolute operating conditions and a description of the factory default switch and jumper configurations. Topic 2.1 2.2 2.3 .................................................................................................. Page Electrostatic Discharge Warning ................................................. 16 Block Diagram .......................................................................... 16 Interface and Connections ......................................................... 16 SBAU141 – January 2009 Submit Documentation Feedback Getting Started 15 Electrostatic Discharge Warning 2.1 www.ti.com Electrostatic Discharge Warning Many of the components on the DEM-PCM2912A EVM are susceptible to damage by electrostatic discharge (ESD). Customers are advised to observe proper ESD handling precautions when unpacking and handling the EVM, including the use of a grounded wrist strap at an approved ESD workstation. CAUTION Failure to observe ESD handling procedures may result in damage to EVM components. 2.2 Block Diagram Figure 2-1 illustrates the DEM-PCM2912A EVM block diagram and the default external equipment connection configuration. PC Mic PCM2912A D+, DPLAY REC USB Connector D2 D1 VIN VOUTL/R POWER J1 Headphone MMUTE MAMP JP1 CN1 SW1 J2 JP2 PCM2912A-EVM Figure 2-1. DEM-PCM2912A EVM Block Diagram 2.3 Interface and Connections Table 2-1 lists the connector references for the DEM-PCM2912A EVM. Table 2-1. DEM-PCM2912A EVM Connectors Connectors CN1 USB connector, type A J1 Mono microphone input J2 Headphone output terminal D1 LED (red); record indicator (flash while muting) D2 LED (green); playback indicator (flash while muting) SW1 Microphone mute switch (1) JP1 Power select (L: 100 mA, H: 500 mA) JP2 Microphone amplifier gain control (Gain = 0 dB/+20 dB) (1) 16 Part/Description Getting Started The status of SW1 (microphone mute switch) is not reflected in the Mic Mute status of the Wave In display on a Windows-based PC; the operating system does not support an HID function. SBAU141 – January 2009 Submit Documentation Feedback Chapter 3 SBAU141 – January 2009 Set-Up Guide This chapter discusses how to set up the DEM-PCM2912A EVM on personal computers (PCs) equipped with any of a variety of major operating systems, including Microsoft Windows Vista®, Windows XP®, and Macintosh® OS X and later. Topic 3.1 3.2 3.3 .................................................................................................. Page Basic Operating Set-Up—Windows Vista ..................................... 18 Basic Operating Set-Up—Windows XP ........................................ 23 Basic Operating Set-Up—Mac OS ............................................... 27 SBAU141 – January 2009 Submit Documentation Feedback Set-Up Guide 17 Basic Operating Set-Up—Windows Vista 3.1 www.ti.com Basic Operating Set-Up—Windows Vista This section reviews how to set up the DEM-PCM2912A EVM for use with a PC equipped with the Microsoft Vista Basic (or higher) operating system. When the installation is complete, the EVM software is ready to use. 3.1.1 Basic Setup Before Evaluation Follow these steps to set up the DEM-PCM2912A EVM for use with Windows Vista. Step 1. Connect the USB connector of the DEM-PCM2912A EVM to an available USB connector (or hub) port on the lab PC. The DEM-PCM2912A EVM can be connected directly to the PC without an additional USB cable. After the EVM is connected to the PC, the standard Windows Vista driver installs automatically to the PC. A custom driver for the DEM-PCM2912A is unnecessary. Step 2. Open the Control Panel from the Start menu (Start→Control Panel. Open the Sound group from the Control Panel. Step 3. Select the playback tab and confirm the USB audio codec appearance as the default playback device, as shown in Figure 3-1. Step 4. Select the recording tab and confirm the USB audio codec appearance as the default recording device, as shown in Figure 3-2. Figure 3-1. Sound—Playback Tab (Windows Vista) 18 Set-Up Guide Figure 3-2. Sound—Recording Tab (Windows Vista) SBAU141 – January 2009 Submit Documentation Feedback Basic Operating Set-Up—Windows Vista www.ti.com 3.1.2 Volume and Mute Settings Follow these steps to configure the volume settings for headphones, microphone, and the recording options. To set the headphone volume: Step 1. Open the Sound options from the Control Panel. (Start→Control Panel→Sound) Step 2. Open the speaker properties of the USB audio codec from the Sound options and select the Levels tab, as Figure 3-3 illustrates. Step 3. Set the output volume, mute, and the balance for headphones from –76 dB to 0 dB. To set the microphone sidetone: Step 1. Open the Sound options from the Control Panel. (Start→Control Panel→Sound) Step 2. Open the speaker properties of the USB audio codec from the Sound options and select the Levels tab, as Figure 3-3 illustrates. Step 3. Set the volume and the mute levels for the microphone sidetone from –76 dB to 0 dB. Figure 3-3. Speakers Properties—Levels Tab (Windows Vista) SBAU141 – January 2009 Submit Documentation Feedback Set-Up Guide 19 Basic Operating Set-Up—Windows Vista www.ti.com To set the record volume: Step 1. Open the Sound options from the Control Panel. (Start→Control Panel→Sound) Step 2. Open the microphone properties of the USB audio codec from the Sound options and select the Levels tab, as Figure 3-4 illustrates. Step 3. Set the microphone volume and the recording mute level from –12 dB to +30 dB. Figure 3-4. Microphone Properties—Levels Tab (Windows Vista) After this process is complete, the system volume setting for each component is maintained even if EVM is plugged in/out. 20 Set-Up Guide SBAU141 – January 2009 Submit Documentation Feedback Basic Operating Set-Up—Windows Vista www.ti.com 3.1.3 Sampling Frequency Under the Windows Vista operating system, it is necessary to select a specific sampling frequency because the sampling frequency cannot be changed on nearly all application software. To set the DAC sampling frequency: 1. Open the Sound options from the Control Panel. (Start→Control Panel→Sound) 2. Open the speaker properties of the USB audio codec from the Sound options and select the Advanced tab, as Figure 3-5 illustrates. 3. Select the desired DAC sampling frequency from seven options: 8 kHz, 11.025 kHz,16 kHz, 22.5 kHz, 32 kHz, 44.1 kHz, and 48 kHz. Figure 3-5. Speakers Properties—Advanced Tab (Windows Vista) SBAU141 – January 2009 Submit Documentation Feedback Set-Up Guide 21 Basic Operating Set-Up—Windows Vista www.ti.com To set the ADC sampling frequency: 1. Open the Sound options from the Control Panel. (Start→Control Panel→Sound) 2. Open the microphone properties of the USB audio codec from the Sound options and select the Advanced tab, as Figure 3-6 illustrates. 3. Select the desired ADC sampling frequency from seven options: 8 kHz, 11.025 kHz,16 kHz, 22.5 kHz, 32 kHz, 44.1 kHz, and 48 kHz. Figure 3-6. Microphone Properties—Advanced Tab (Windows Vista) 22 Set-Up Guide SBAU141 – January 2009 Submit Documentation Feedback Basic Operating Set-Up—Windows XP www.ti.com 3.2 Basic Operating Set-Up—Windows XP This section reviews how to set up the DEM-PCM2912A EVM for use with a PC equipped with the Microsoft XP (including Service Pack 2 updates) operating system. When the installation is complete, the EVM software is ready to use. 3.2.1 Basic Setup Before Evaluation Follow these steps to set up the DEM-PCM2912A EVM for use with Windows XP. Step 1. Connect the USB connector of the DEM-PCM2912A EVM to an available USB connector (or hub) port on the lab PC. The DEM-PCM2912A EVM can be connected directly to the PC without an additional USB cable. After the EVM is connected to the PC, the standard Windows XP driver installs automatically to the PC. A custom driver for the DEM-PCM2912A is unnecessary. Step 2. Open the Control Panel from the Start menu (Start→Control Panel. Open the Sound and Audio Devices group from the Control Panel. Step 3. Select the Audio tab and confirm the USB audio codec appearance as the default playback and recording device, as shown in Figure 3-7. Figure 3-7. Sound and Audio Devices Properties—Audio Tab (Windows XP) This process confirms the proper recognition of the DEM-PCM2912A EVM by Windows XP. SBAU141 – January 2009 Submit Documentation Feedback Set-Up Guide 23 Basic Operating Set-Up—Windows XP www.ti.com 3.2.2 Volume Settings Follow these steps to configure the volume settings for headphones, microphone, and the recording options. To set the headphone volume: Step 1. Open the Sound options from the Control Panel. (Start→Control Panel→Sound) Step 2. Open the Sound and Audio Devices Properties dialog box and select the Volume tab, as Figure 3-8 illustrates. Alternatively, open the Speakers window from the Volume selection box (on the Audio tab) or the Advanced selection box (on the Volume tab); see Figure 3-7. Step 3. Set the output volume and the mute levels for headphones from –76 dB to 0 dB. The initial volume setting upon installation is approximately –15 dB. Figure 3-8. Sound and Audio Devices Properties—Volume Tab (Windows XP) 24 Set-Up Guide SBAU141 – January 2009 Submit Documentation Feedback Basic Operating Set-Up—Windows XP www.ti.com To set the microphone sidetone: 1. Open the Speakers options from the Volume selection box (on the Audio tab) or the Advanced selection box (on the Volume tab); see Figure 3-8. Alternatively, double-click the speaker icon (if displayed) in the lower right-hand area of the Windows taskbar (at the bottom of the screen); see Figure 3-7. 2. Set the volume and the mute levels for the microphone sidetone from –76 dB to 0 dB, as shown in Figure 3-9. The initial volume setting upon installation is approximately –8 dB. Figure 3-9. Speaker Window for Volume Setting (Windows XP) To set the record volume: 1. Open the Sound options from the Control Panel. (Start→Control Panel→Sound) 2. Open the Sound and Audio Devices Properties dialog box and select the Microphone tab, as Figure 3-10 illustrates. Figure 3-10. Sound and Audio Devices Properties—Audio Tab (Windows XP) SBAU141 – January 2009 Submit Documentation Feedback Set-Up Guide 25 Basic Operating Set-Up—Windows XP www.ti.com space 3. Set the microphone volume and the recording mute level from –12 dB to +30 dB, as shown in Figure 3-11. The initial volume setting upon installation is approximately +8 dB. Figure 3-11. Microphone Volume Windows for Record Volume Setting (Windows XP) After this process is complete, the system volume setting for each component is maintained even if EVM is plugged in/out. 26 Set-Up Guide SBAU141 – January 2009 Submit Documentation Feedback Basic Operating Set-Up—Mac OS www.ti.com 3.3 Basic Operating Set-Up—Mac OS This section reviews how to set up the DEM-PCM2912A EVM for use with a Macintosh computer equipped with the Mac OS X (or later) operating system. When the installation is complete, the EVM software is ready to use. 3.3.1 Basic Setup Before Evaluation Follow these steps to set up the DEM-PCM2912A EVM for use with a Macintosh computer. Step 1. Connect the USB connector of the DEM-PCM2912A EVM to an available USB connector (or hub) port on the lab computer. The DEM-PCM2912A EVM can be connected directly to the PC without an additional USB cable. After the EVM is connected to the PC, the standard Mac OS driver installs automatically to the computer system. A custom driver for the DEM-PCM2912A is unnecessary. Step 2. Open the System Environment Settings from the Start menu. Open the Sound options from the System Environment settings. Step 3. Select the Input tab and confirm the USB audio codec appearance as the default recording device, as shown in Figure 3-12. Figure 3-12. Sound—Input Tab (Mac OS) SBAU141 – January 2009 Submit Documentation Feedback Set-Up Guide 27 Basic Operating Set-Up—Mac OS space Step 4. www.ti.com Select the Output tab and confirm the USB audio codec appearance as the default playback device, as shown in Figure 3-13. Figure 3-13. Sound—Output Tab (Mac OS) This process confirms the proper recognition of the DEM-PCM2912A EVM by Mac OS X. 28 Set-Up Guide SBAU141 – January 2009 Submit Documentation Feedback www.ti.com Basic Operating Set-Up—Mac OS 3.3.2 Volume Settings Follow these steps to configure the volume settings for headphones, microphone, and the recording options. To set the headphone volume: Step 1. Open the Audio MIDI Settings options (Application→Utility→Set Audio MIDI), as illustrated in Figure 3-14. Alternatively, open the Output tab of the Sound options, as illustrated in Figure 3-13. Step 2. Set the headphone volume and the audio output levels from –76 dB to 0 dB, and set the desired mute. To set the record volume: 1. Open the Audio MIDI Settings options (Application→Utility→Set Audio MIDI), as illustrated in Figure 3-14. Alternatively, open the Input tab of the Sound options, as illustrated in Figure 3-12. 2. Set the recording level from –12 dB to +30 dB, and set the desired mute. Figure 3-14. Audio Midi Setting Window (Mac OS) SBAU141 – January 2009 Submit Documentation Feedback Set-Up Guide 29 Basic Operating Set-Up—Mac OS www.ti.com To set the microphone sidetone: The volume setting of the microphone sidetone is controlled by the individual application software on the Mac. For example, Audio Recording using QuickTime® (as shown in Figure 3-15) sets the microphone volume for sidetone from –76dB to 0dB. Figure 3-15. QuickTime Audio Recording Controls After this process is complete, the system volume setting for each component is maintained even if EVM is plugged in/out. 3.3.3 Sampling Frequency Under the Mac OS X operating system, it is necessary to select a specific sampling frequency because the sampling frequency cannot be changed on nearly all application software. To set the DAC sampling frequency: 1. Open the Audio MIDI Settings options (Application→Utility→Set Audio MIDI), as illustrated in Figure 3-16. 2. Select the Audio Input tab in the Set Audio MIDI options group, as Figure 3-16 shows. 3. Select the desired DAC sampling frequency from seven options: 8 kHz, 11.025 kHz,16 kHz, 22.5 kHz, 32 kHz, 44.1 kHz, and 48 kHz. To set the ADC sampling frequency: 1. Open the Audio MIDI Settings options (Application→Utility→Set Audio MIDI), as illustrated in Figure 3-16. 2. Select the Audio Output tab in the Set Audio MIDI options group, as shown in Figure 3-16. 3. Select the desired ADC sampling frequency from seven options: 8 kHz, 11.025 kHz,16 kHz, 22.5 kHz, 32 kHz, 44.1 kHz, and 48 kHz. 30 Set-Up Guide SBAU141 – January 2009 Submit Documentation Feedback www.ti.com Basic Operating Set-Up—Mac OS Figure 3-16. Audio Midi Setting Window (Mac OS) SBAU141 – January 2009 Submit Documentation Feedback Set-Up Guide 31 32 Set-Up Guide SBAU141 – January 2009 Submit Documentation Feedback Chapter 4 SBAU141 – January 2009 Evaluation and Measurements This chapter discusses how to set up the DEM-PCM2912A EVM for performance evaluation using the Audio Precision SYS-2722® audio analyzer. The process of measuring dynamic characteristics is then presented, along with example characteristic data. Topic 4.1 4.2 4.3 .................................................................................................. Page Measurements for Dynamic Characteristics ................................. 34 Playback Performance ............................................................... 34 Recording Performance ............................................................. 36 SBAU141 – January 2009 Submit Documentation Feedback Evaluation and Measurements 33 Measurements for Dynamic Characteristics 4.1 www.ti.com Measurements for Dynamic Characteristics Typical dynamic performance graphs for playback and recording devices generally represent three performance characteristics (in addition to other specifications): total harmonic distortion and noise (THD+N); signal-to-noise ratio (SNR); and dynamic range (DR). For playback devices, channel separation is also a performance characteristic. These graphs also specify the test environment and measurement conditions required in order to meet typical performance values defined in the product data sheet. For the DEM-PCM2912A EVM, the evaluation environment specifications are: • Equipment used: Audio Precision, System Two Cascade Plus • Power supply: VBUS = 5.0 V (Bus power setting) • Temperature: Room/ambient 4.2 Playback Performance The DEM-PCM2912A EVM performance presented in this section was obtained under the following conditions: • fS = 44.1 kHz • Output PGA (Speaker output volume): 0 dB • Sidetone from microphone PGA: –76 dB (mute) • RL = 10 kΩ / 32 Ω / 16 Ω are inserted into headphone jack J2 for headphone output • Jumper setting: set JP1 to 100 mA and JP2 to 0 dB • Application software for playback: Sound Recorder, Media Player and ITunes for Windows Vista/XP; QuickTime and ITunes for Mac OS X. • Equipment: AP2 Analog Analyzer (SYS-2722) Configure the equipment as shown in Figure 4-1. PC Audio Precision SYS-2722 Playing test data at fS = 44.1 kHz by application software (for example, Sound Recorder, Media Player, etc.) Analog Analyzer Mic J1 PCM2912A Headphone D2 USB Connector 100 mA D1 SW1 JP1 0 dB JP2 Left ch J2 Right ch RL PCM2912A-EVM Figure 4-1. DEM-PCM2912A EVM Configuration for Playback Performance Measurement 34 Evaluation and Measurements SBAU141 – January 2009 Submit Documentation Feedback Playback Performance www.ti.com Table 4-1. Line Output Playback Performance Power Supply 5.0 V Performance Filter Setting RL VOUTL VOUTR THD+N (0 dBFS at 1 kHz) 400 Hz to 20 kHz Pre-Anlr 10 kΩ 0.0086% 0.0085% SNR (BPZ input) 400 Hz to 20 kHz Pre-Anlr + A-weighting 10 kΩ 92.1 dB 92.1 dB DR (–60 dBFS input) 400 Hz to 20 kHz Pre-Anlr + A-weighting 10 kΩ 90.3 dB 90.5 dB Channel Separation 400 Hz to 20 kHz (BPZ input for target Pre-Anlr channel) 10 kΩ 89.3 dB 89.3 dB Table 4-2. 32-Ω Headphone Output Playback Performance Power Supply 5.0 V RL VOUTL VOUTR THD+N (0 dBFS at 1 kHz) Performance 400 Hz to 20 kHz Pre-Anlr Filter Setting 32 Ω 0.026% 0.025% SNR (BPZ input) 400 Hz to 20 kHz Pre-Anlr + A-weighting 32 Ω 92.1 dB 92.1 dB DR (–60 dBFS input) 400 Hz to 20 kHz Pre-Anlr + A-weighting 32 Ω 89.4 dB 89.4 dB Table 4-3. 16-Ω Headphone Output Playback Performance Power Supply 5.0 V RL VOUTL VOUTR THD+N (0 dBFS at 1 kHz) Performance 400 Hz to 20 kHz Pre-Anlr 16 Ω 0.044% 0.042% SNR (BPZ input) 400 Hz to 20 kHz Pre-Anlr + A-weighting 16 Ω 92.1 dB 92.1 dB DR (–60 dBFS input) 400 Hz to 20 kHz Pre-Anlr + A-weighting 16 Ω 89.4 dB 89.3 dB SBAU141 – January 2009 Submit Documentation Feedback Filter Setting Evaluation and Measurements 35 Recording Performance 4.3 www.ti.com Recording Performance The DEM-PCM2912A EVM playback performance presented in this section was obtained under the following conditions: • fS = 44.1 kHz • Input PGA (Microphone input volume): 0 dB • Jumper setting: set JP1 to 100 mA and JP2 to 0 dB • Application software for playback: Sound Recorder, Media Player and ITunes for Windows Vista/XP; QuickTime and ITunes for Mac OS X. • Use analog input data provided by the AP2 analog generator (SYS-2722) with unbalanced floating ground setting. Configure the equipment as shown in Figure 4-2. PC Audio Precision SYS-2722 Recording at fS = 44.1 kHz by application software (for example, Sound Recorder, QuickTime, etc.) Analog Generator Mic Unbalanced Floating GND setting J1 PCM2912A Headphone D2 100 mA D1 JP1 0 dB JP2 SW1 USB Connector J2 PCM2912A-EVM Figure 4-2. DEM-PCM2912A EVM Configuration for Recording Performance Measurement when Recording Data To measure recording performance with the recording data, use S/PDIF digital interface output data. Connect the EVM to the AP2 digital analyzer (SYS-2722); for example, as the DEM-PCM2704 EVM shown in Figure 4-3. PC Volume gain = 0 dB Audio Precision SYS-2722 DEM-PCM2704EVM USB Connector S/PDIF Output Digital Analyzer Figure 4-3. DEM-PCM2704EVM Configuration for Recording Performance Measurement with Recorded Data Table 4-4. Line Input Recording Performance Power Supply 5.0 V 36 Evaluation and Measurements Performance Filter Setting DOUT THD+N (–1 dB at 1 kHz) 400 Hz to 20 kHz LP 0.008% SNR (BPZ input) 400 Hz to 20 kHz LP + A-weighting 92.5 dB DR (–60 dB input) 400 Hz to 20 kHz LP + A-weighting 90.5 dB SBAU141 – January 2009 Submit Documentation Feedback Chapter 5 SBAU141 – January 2009 Schematic, PCB Layout, and Bill of Materials This chapter provides the electrical and physical layout information for the DEM-PCM2912A EVM. The bill of materials is included for component and manufacturer reference. Note: Board layouts are not to scale. These are intended to show how the board is laid out; they are not intended to be used for manufacturing DEM-PCM2912A EVM PCBs. Topic 5.1 5.2 5.3 .................................................................................................. Page Schematics .............................................................................. 38 Printed Circuit Board Layout ...................................................... 39 Component List ........................................................................ 40 SBAU141 – January 2009 Submit Documentation Feedback Schematic, PCB Layout, and Bill of Materials 37 Schematics 5.1 www.ti.com Schematics The schematic for the DEM-PCM2912A EVM is shown in Figure 5-1. Figure 5-1. DEM-PCM2912A EVM Schematic 38 Schematic, PCB Layout, and Bill of Materials SBAU141 – January 2009 Submit Documentation Feedback Printed Circuit Board Layout www.ti.com 5.2 Printed Circuit Board Layout Figure 5-2 through Figure 5-4 illustrate the printed circuit board (PCB) layout for the DEM-PCM2912A EVM. Figure 5-2. DEM-PCM2912A EVM Board Layout—Silkscreen Figure 5-3. DEM-PCM2912A EVM Board Layout—Component Side Figure 5-4. DEM-PCM2912A EVM Board Layout—Inner View SBAU141 – January 2009 Submit Documentation Feedback Schematic, PCB Layout, and Bill of Materials 39 Component List 5.3 www.ti.com Component List Table 5-1 lists the bill of materials for the DEM-PCM2912A EVM. Table 5-1. Bill of Materials 40 Reference Designator Value Value2 C1 22 pF 50 V, 5% Taiyoyuden UMK107CH220JZ C2 22 pF 50 V, 5% Taiyoyuden UMK107CH220JZ C4 100 pF 50 V, 5% Taiyoyuden UMK107CH101JZ Manufacturer Mfr Part No C5 100 pF 50 V, 5% Taiyoyuden UMK107CH101JZ C13 0.022 µF 25 V, 10% Taiyoyuden TMK107BJ223KA C14 0.022 µF 25 V, 10% Taiyoyuden TMK107BJ223KA Remarks C7 0.1 µF 25 V, 10% Taiyoyuden TMK105BJ104KV C11 1 µF 16 V, 10% Matsushita ECJ-1VB1C105K C12 1 µF 16 V, 10% Matsushita ECJ-1VB1C105K C17 1 µF 16 V, 10% Matsushita ECJ-1VB1C105K C18 1 µF 16 V, 10% Matsushita ECJ-1VB1C105K C3 1 µF 16 V, 10% Matsushita ECJ-1VB1C105K C8 1 µF 16 V, 10% Matsushita ECJ-1VB1C105K C10 3.3 µF 10 V, 10% Murata SS GRM40B335K10PT C6 10 µF 6.3 V, 20% Rohm TCP0J106M8R C9 10 µF 6.3 V, 20% Rohm TCP0J106M8R C15 100 µF 4 V, 20% Matsushita ECE-A0GKS101 C16 100 µF 4 V, 20% Matsushita ECE-A0GKS101 CN1 USB 'A' ACON UAR10-4W5100 Host Interface D1 LED Rohm SLR342-VR Recording Indicator D2 LED Rohm SLR342-MG playback Indicator J1 Stereo mini Jack SMK LGY2502-0200 Stereo Headphone J2 Stereo mini Jack SMK LGY2502-0200 Mic Input and Bias R11 16 5% KOA RK73K1J-160J R12 16 5% KOA RK73K1J-160J R1 33 5% KOA RK73K1J-330J R2 33 5% KOA RK73K1J-330J R17 820 5% KOA RK73K1J-821J R18 820 5% KOA RK73K1J-821J R19 1k 5% KOA RK73K1J-102J R3 1.5k 5% KOA RK73K1J-152J R13 3.3k 5% KOA RK73K1J-332J R14 3.3k 5% KOA RK73K1J-332J R15 3.3k 5% KOA RK73K1J-332J R16 3.3k 5% KOA RK73K1J-332J R4 1M 5% KOA RK73K1J-105J ALPS SKQTLBE010 SW1 Tact SW U1 PCM2912APJT Y1 Crystal JP2 JP3 Should be adjusted to meet USB spec. Mic Mute TI 6 MHz, ±30 ppm Epson CA301 6.000M-C Jumper SW Hiroshe denshi A2-3PA2.54DSA(71) Jumper SW Hiroshe denshi A2-3PA2.54DSA(71) Schematic, PCB Layout, and Bill of Materials SBAU141 – January 2009 Submit Documentation Feedback Component List www.ti.com Table 5-1. Bill of Materials (continued) Reference Designator Value Value2 Manufacturer Mfr Part No TP1, TP4–TP5, TP12–TP15 Check pin Mac8 HK-4-S TP2–TP3, TP6–TP11 Check pin Mac8 HK-6-S SBAU141 – January 2009 Submit Documentation Feedback Remarks Schematic, PCB Layout, and Bill of Materials 41 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or safety programs, please contact the TI application engineer or visit www.ti.com/esh. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. FCC Warning This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of –2.0 V to +4.0 V and the output voltage range of –2.0 V to +4.0 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than +60°C. The EVM is designed to operate properly with certain components above +60°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. 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