Page 7 - Preface; About This Manual; Related Documentation from Texas Instruments; How to Use This Manual; EVM; Information About Cautions and Warnings; CAUTION
Preface SBAU141 – January 2009 Read This First About This Manual This document provides the information needed to set up and operate the DEM-PCM2912A EVMevaluation module, a test platform for the 16-bit, mono microphone input and stereo headphone output,single-chip PCM2912A stereo audio coder/decode...
Page 8 - Related Documentation From Texas Instruments; TI web site; Data Sheet; If You Need Assistance; All trademarks are the property of their respective owners.
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 theassembly of the DEM-PCM2912A EVM. These documents are available from the TI web site . The last ...
Page 9 - Chapter 1; bus-powered audio codec with a USB interface. All necessary; Topic; Pin Assignments and Terminal Functions
Chapter 1 SBAU141 – January 2009 Description The DEM-PCM2912A EVM is a complete evaluation platform for the 16-bit, mono microphone input andstereo headphone output PCM2912A bus-powered audio codec with a USB interface. All necessary connectors and circuitry are provided for interfacing to audio tes...
Page 11 - shows the pin assignments for the PCM2912A.; Name
1.2 Pin Assignments and Terminal Functions PCM2912APJT (32-pin TQFP) 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 32 10 31 11 30 12 29 13 28 14 27 15 26 16 25 PGND V IN V CCP V CCA TEST1 NC TEST0 AGND SSPND V COM2 MMUTE V COM1 REC FR PLAY FL BGND V BU S D - D+ V D D DGND XTO XTI POWER MAMP V R O U T V ...
Page 13 - Functional Block Diagram; illustrates the functional block diagram of the DEM-PCM2912A EVM.
1.3 Functional Block Diagram S S XTI XTO 6.000 MHz 96 MHz PLL (x16) Tracker (SpAct ) â USB protocol controller ISO-out endpoint Control endpoint ISO-in endpoint FIFO FIFO XCVR Selector Selector Analog PLL Analog PLL USB SIE V REF 5 V to 3.3 V Voltage Regulator Power Manager ADC DAC MIC Bias MIC Amp ...
Page 15 - Chapter 2; Electrostatic Discharge Warning
Chapter 2 SBAU141 – January 2009 Getting Started This chapter provides information regarding handling and unpacking the DEM-PCM2912A EVM, as wellas the EVM absolute operating conditions and a description of the factory default switch and jumperconfigurations. Topic .....................................
Page 16 - Interface and Connections; connection configuration.; Connectors
2.1 Electrostatic Discharge Warning 2.2 Block Diagram PC USB Connector D2 D1 SW1 JP1 J1 JP2 J2 PCM2912A PCM2912A-EVM Mic Headphone CN1 D+, D - PLAYREC V IN V L/R OUT POWER MMUTE MAMP 2.3 Interface and Connections Electrostatic Discharge Warning www.ti.com Many of the components on the DEM-PCM2912A E...
Page 17 - Chapter 3; Macintosh; Basic Operating Set-Up—Windows Vista
Chapter 3 SBAU141 – January 2009 Set-Up Guide This chapter discusses how to set up the DEM-PCM2912A EVM on personal computers (PCs) equippedwith any of a variety of major operating systems, including Microsoft Windows Vista ® , Windows XP ® , and Macintosh ® OS X and later. Topic ......................
Page 18 - When the installation is complete, the EVM software is ready to use.
3.1 Basic Operating Set-Up—Windows Vista 3.1.1 Basic Setup Before Evaluation Basic Operating Set-Up—Windows Vista www.ti.com This section reviews how to set up the DEM-PCM2912A EVM for use with a PC equipped with theMicrosoft Vista Basic (or higher) operating system. When the installation is complet...
Page 19 - To set the headphone volume:
3.1.2 Volume and Mute Settings www.ti.com Basic Operating Set-Up—Windows Vista Follow these steps to configure the volume settings for headphones, microphone, and the recordingoptions. To set the headphone volume: Step 1. Open the Sound options from the Control Panel. ( Start → Control Panel → Sound...
Page 20 - To set the record volume:
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 selectthe Levels tab, as Figure 3-4 illustrates....
Page 21 - To set the DAC sampling frequency:
3.1.3 Sampling Frequency www.ti.com Basic Operating Set-Up—Windows Vista Under the Windows Vista operating system, it is necessary to select a specific sampling frequencybecause the sampling frequency cannot be changed on nearly all application software. To set the DAC sampling frequency: 1. Open th...
Page 22 - To set the ADC sampling frequency:
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 illustrate...
Page 23 - Basic Operating Set-Up—Windows XP
3.2 Basic Operating Set-Up—Windows XP 3.2.1 Basic Setup Before Evaluation www.ti.com Basic Operating Set-Up—Windows XP This section reviews how to set up the DEM-PCM2912A EVM for use with a PC equipped with theMicrosoft XP (including Service Pack 2 updates) operating system. When the installation is...
Page 25 - To set the microphone sidetone:
www.ti.com Basic Operating Set-Up—Windows XP 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 righ...
Page 26 - space
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...
Page 27 - Basic Operating Set-Up—Mac OS; System Environment Settings
3.3 Basic Operating Set-Up—Mac OS 3.3.1 Basic Setup Before Evaluation www.ti.com Basic Operating Set-Up—Mac OS This section reviews how to set up the DEM-PCM2912A EVM for use with a Macintosh computerequipped with the Mac OS X (or later) operating system. When the installation is complete, the EVM s...
Page 30 - Figure 3-15. QuickTime Audio Recording Controls
3.3.3 Sampling Frequency 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 onthe Mac. For example, Audio Recording using QuickTime ® (as shown in Figure 3-15 ) sets the microphon...
Page 33 - Chapter 4; presented, along with example characteristic data.; Measurements for Dynamic Characteristics
Chapter 4 SBAU141 – January 2009 Evaluation and Measurements This chapter discusses how to set up the DEM-PCM2912A EVM for performance evaluation using theAudio Precision SYS-2722 ® audio analyzer. The process of measuring dynamic characteristics is then presented, along with example characteristic ...
Page 34 - Equipment used: Audio Precision, System Two Cascade Plus; are inserted into headphone jack J2 for headphone output
4.1 Measurements for Dynamic Characteristics 4.2 Playback Performance PC Playing test data at f = 44.1 kHz by application software(for example, Sound Recorder, Media Player, etc.) S USBConnector D2 D1 SW1 JP1 J1 JP2 J2 100 mA 0 dB PCM2912A PCM2912A-EVM Mic Headphone Audio Precision SYS-2722 Analog A...
Page 35 - Playback Performance; Table 4-1. Line Output Playback Performance; Headphone Output Playback Performance
www.ti.com Playback Performance Table 4-1. Line Output Playback Performance Power Supply Performance Filter Setting R L V OUT L V OUT R 5.0 V THD+N (0 dBFS at 400 Hz to 20 kHz 10 k Ω 0.0086% 0.0085% 1 kHz) Pre-Anlr SNR (BPZ input) 400 Hz to 20 kHz 10 k Ω 92.1 dB 92.1 dB Pre-Anlr+ A-weighting DR (–60...
Page 36 - Recording Performance; Jumper setting: set JP1 to 100 mA and JP2 to 0 dB; Recording Data; Power Supply
4.3 Recording Performance PC Recording at f = 44.1 kHz by application software(for example, Sound Recorder, QuickTime, etc.) S USBConnector D2 D1 SW1 JP1 J1 JP2 J2 100 mA 0 dB PCM2912A PCM2912A-EVM Mic Headphone Audio Precision SYS-2722 Analog Generator UnbalancedFloating GND setting Audio Precision...
Page 37 - Chapter 5; Schematics
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 billof materials is included for component and manufacturer reference. Note: Board layouts are not to scale. These are inte...
Page 38 - The schematic for the DEM-PCM2912A EVM is shown in
5.1 Schematics Schematics www.ti.com The schematic for the DEM-PCM2912A EVM is shown in Figure 5-1 . Figure 5-1. DEM-PCM2912A EVM Schematic Schematic, PCB Layout, and Bill of Materials 38 SBAU141 – January 2009 Submit Documentation Feedback
Page 39 - Printed Circuit Board Layout; through
5.2 Printed Circuit Board Layout www.ti.com 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....
Page 40 - Component List; lists the bill of materials for the DEM-PCM2912A EVM.
5.3 Component List Component List www.ti.com Table 5-1 lists the bill of materials for the DEM-PCM2912A EVM. Table 5-1. Bill of Materials Reference Designator Value Value2 Manufacturer Mfr Part No Remarks C1 22 pF 50 V, 5% Taiyoyuden UMK107CH220JZ C2 22 pF 50 V, 5% Taiyoyuden UMK107CH220JZ C4 100 pF...
Page 42 - EVALUATION BOARD/KIT IMPORTANT NOTICE; FCC Warning; ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES; EVM WARNINGS AND RESTRICTIONS
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...
Page 43 - IMPORTANT NOTICE; Products
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 shouldobtain the l...
