Texas Instruments DEM-PCM2912A EVM User Manual
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Texas Instruments DEM-PCM2912A EVM User Manual

Texas instruments evaluation module user's guide
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DEM-PCM2912A EVM
User's Guide
Literature Number: SBAU141
January 2009

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Summary of Contents for Texas Instruments DEM-PCM2912A EVM

  • Page 1 DEM-PCM2912A EVM User's Guide Literature Number: SBAU141 January 2009...
  • Page 2 SBAU141 – January 2009 Submit Documentation Feedback...

  • Page 3: Table Of Contents

    Preface Description Introduction—PCM2912A 1.1.1 Key Features Pin Assignments and Terminal Functions Functional Block Diagram Getting Started Electrostatic Discharge Warning Block Diagram Interface and Connections Set-Up Guide Basic Operating Set-Up—Windows Vista 3.1.1 Basic Setup Before Evaluation 3.1.2 Volume and Mute Settings 3.1.3 Sampling Frequency Basic Operating Set-Up—Windows XP...
  • Page 4 3-16 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...
  • Page 5 PCM2912A Terminal Functions DEM-PCM2912A EVM Connectors Line Output Playback Performance Headphone Output Playback Performance Headphone Output Playback Performance Line Input Recording Performance Bill of Materials SBAU141 – January 2009 Submit Documentation Feedback List of Tables List of Tables...
  • Page 6 List of Tables SBAU141 – January 2009 Submit Documentation Feedback...

  • Page 7: Preface

    (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...

  • Page 8: Related Documentation From Texas Instruments

    User’s Guide. Newer revisions may be available from the TI web site at 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.

  • Page 9: Description

    PCM2912A 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 Introduction—PCM2912A...

  • Page 10: Introduction-Pcm2912A

    (PGA), and microphone bias. It is available in a 32-pin TQFP package. The DEM-PCM2912A EVM also carries the Microsoft Windows Microsoft Windows Hardware Quality Labs (WHQL). The DEM-PCM2912A has successfully passed the Microsoft WLP test (DTM Audio) for Windows Vista 1.1.1 Key Features...

  • Page 11: Pin Assignments And Terminal Functions

    www.ti.com Pin Assignments and Terminal Functions Figure 1-1 shows the pin assignments for the PCM2912A. PGND TEST1 TEST0 SSPND MMUTE PLAY Table 1-1. PCM2912A Terminal Functions TQFP-36 Name Terminal BGND – – D– – DGND – – – COM1 – COM2 AGND –...
  • Page 12 Pin Assignments and Terminal Functions Table 1-1. PCM2912A Terminal Functions (continued) TQFP-36 Name Terminal -– MAMP POWER PGND – – TEST1 TEST0 SSPND MMUTE PLAY Description Description Analog power supply for headphone amplifier of R-channel Headphone output for R-channel Microphone preamplifier gain control (LOW: Preamplifier off; HIGH: Preamplifier on = +20 Power consumption declaration select pin (LOW: 100 mA;...

  • Page 13: Functional Block Diagram

    Functional Block Diagram Figure 1-2 illustrates the functional block diagram of the DEM-PCM2912A EVM. PGA +30 dB to MBIAS Bias in 1-dB steps COM2 COM1 ATT 0 dB to 76 dB in 1-dB steps with Mute HP AMP 15 mW (at 32 )
  • Page 14 Description SBAU141 – January 2009 Submit Documentation Feedback...

  • Page 15: 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 Electrostatic Discharge Warning Block Diagram Interface and Connections SBAU141 – January 2009...

  • Page 16: Electrostatic Discharge Warning

    Electrostatic Discharge Warning 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.

  • Page 17: 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 Macintosh OS X and later. ® Topic Basic Operating Set-Up—Windows Vista Basic Operating Set-Up—Windows XP Basic Operating Set-Up—Mac OS...

  • Page 18: Basic Operating Set-Up-Windows Vista

    Basic Operating Set-Up—Windows Vista 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.

  • Page 19: Volume And Mute Settings

    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.

  • Page 20: Microphone Properties-Levels Tab (Windows Vista)

    Basic Operating Set-Up—Windows Vista 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 Step 3.

  • Page 21: Sampling Frequency

    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.

  • Page 22: Microphone Properties-Advanced Tab (Windows Vista)

    Basic Operating Set-Up—Windows Vista 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 3.

  • Page 23: Basic Operating Set-Up-Windows Xp

    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.

  • Page 24: Volume Settings

    Basic Operating Set-Up—Windows XP 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.

  • Page 25: Speaker Window For Volume Setting (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 displayed) in the lower right-hand area of the Windows taskbar (at the bottom of the screen); see Figure 3-7.

  • Page 26: Microphone Volume Windows For Record Volume Setting (Windows Xp)

    Basic Operating Set-Up—Windows XP 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.

  • Page 27: Basic Operating Set-Up-Mac Os

    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.

  • Page 28: Sound-Output Tab (Mac Os)

    Step 4. Select the Output tab and confirm the USB audio codec appearance as the default playback device, as shown in Figure 3-13. Sound—Output Tab (Mac OS) This process confirms the proper recognition of the DEM-PCM2912A EVM by Mac OS X. Set-Up Guide Figure 3-13.

  • Page 29: Volume Settings

    www.ti.com 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.

  • Page 30: Sampling Frequency

    Basic Operating Set-Up—Mac OS 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 microphone volume for sidetone from –76dB to 0dB. Figure 3-15.

  • Page 31: Audio Midi Setting Window (Mac Os)

    Basic Operating Set-Up—Mac OS www.ti.com Figure 3-16. Audio Midi Setting Window (Mac OS) SBAU141 – January 2009 Set-Up Guide Submit Documentation Feedback...
  • Page 32 Set-Up Guide SBAU141 – January 2009 Submit Documentation Feedback...

  • Page 33: Evaluation And Measurements

    This chapter discusses how to set up the DEM-PCM2912A EVM for performance evaluation using the Audio Precision SYS-2722 ® presented, along with example characteristic data. Topic Measurements for Dynamic Characteristics Playback Performance Recording Performance SBAU141 – January 2009 Submit Documentation Feedback Evaluation and Measurements audio analyzer.

  • Page 34: Measurements For Dynamic Characteristics

    Power supply: V = 5.0 V (Bus power setting) Temperature: Room/ambient Playback Performance The DEM-PCM2912A EVM performance presented in this section was obtained under the following conditions: = 44.1 kHz Output PGA (Speaker output volume): 0 dB Sidetone from microphone PGA: –76 dB (mute)

  • Page 35: Headphone Output Playback Performance

    www.ti.com Power Supply Performance 5.0 V THD+N (0 dBFS at 1 kHz) SNR (BPZ input) DR (–60 dBFS input) Channel Separation 400 Hz to 20 kHz (BPZ input for target Pre-Anlr channel) Table 4-2. 32- Power Supply Performance 5.0 V THD+N (0 dBFS at 1 kHz) SNR (BPZ input)

  • Page 36: Line Input Recording Performance

    Recording Performance Recording Performance The DEM-PCM2912A EVM playback performance presented in this section was obtained under the following conditions: = 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;...

  • Page 37: Schematic, Pcb Layout, And Bill Of Materials

    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.

  • Page 38: Schematics

    Schematics Schematics The schematic for the DEM-PCM2912A EVM is shown in Figure 5-1. DEM-PCM2912A EVM Schematic Schematic, PCB Layout, and Bill of Materials Figure 5-1. SBAU141 – January 2009 Submit Documentation Feedback www.ti.com...

  • Page 39: Printed Circuit Board Layout

    Figure 5-4 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 illustrate the printed circuit board (PCB) layout for the DEM-PCM2912A...

  • Page 40: Component List

    Component List Component List Table 5-1 lists the bill of materials for the DEM-PCM2912A EVM. Reference Designator Value 22 pF 22 pF 100 pF 100 pF 0.022 F 0.022 F 0.1 F 3.3 F 10 F 10 F 100 F...
  • Page 41 www.ti.com Reference Designator Value TP1, Check pin TP4–TP5, TP12–TP15 TP2–TP3, Check pin TP6–TP11 SBAU141 – January 2009 Submit Documentation Feedback Table 5-1. Bill of Materials (continued) Value2 Manufacturer Mac8 HK-4-S Mac8 HK-6-S Schematic, PCB Layout, and Bill of Materials Component List Mfr Part No Remarks...

  • Page 42: Evaluation Board/Kit Important Notice

    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.

  • Page 43: Important Notice

    Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.

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