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DEM-DSD1796/PCM1795/PCM1796/PCM1798
DSD1796/PCM1795/PCM1796/PCM1798 Evaluation Module
User's Guide
Literature Number: SLEU057A
September 2004–Revised May 2009
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2 SLEU057A–September 2004–Revised May 2009 Submit Documentation Feedback
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Contents Preface ............................................................................................................................... 5 1 Description ................................................................................................................ 7 1.1 Functional Block Diagram .................................................................................................. 8 1.2 EVM Features..............................................................................
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www.ti.com List of Figures 1-1 DEM-DSD1796/PCM1795/PCM1796/PCM1798 Block Diagram ...................................................... 8 2-1 DEM-DAI/ASDAC Silkscreen ............................................................................................. 12 2-2 DEM-DAI/ASDAC (Top View) ............................................................................................ 13 2-3 DEM-DAI/ASDAC (Bottom View)................................................................................
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Preface SLEU057A–September 2004–Revised May 2009 Read This First About This Manual This document provides the information needed to set up and operate the DEM-DSD1796/PCM1795/PCM1796/PCM1798 EVM evaluation module, a test platform for the 24-bit, 192-kHz, sampling stereo DSD1796, PCM1795, PCM1796, and PCM1798 audio digital-to-analog converters (DACs). For a more detailed description of these devices, refer to the specific device product data sheet available from the Texas Instruments web site at
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Trademarks www.ti.com Trademarks All trademarks are the property of their respective owners. 6 Read This First SLEU057A–September 2004–Revised May 2009 Submit Documentation Feedback
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Chapter 1 SLEU057A–September 2004–Revised May 2009 Description The DEM-DSD1796/PCM1795/PCM1796/PCM1798 is an evaluation fixture for the DSD1796/PCM1795/ PCM1796/PCM1798 series of 24-bit, 192-kHz sampling stereo DACs. This EVM provides all necessary connectors and circuitry for interfacing to audio test systems and commercial audio equipment. Topic .................................................................................................. Page 1.1 Functional Block Diagram..................
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Functional Block Diagram www.ti.com 1.1 Functional Block Diagram Figure 1-1 illustrates the functional block diagram of the DEM-DSD1796/PCM1795/PCM1796/PCM1798 EVM. I/V CN003 5534a Serial LchOUT BAL Amp Connector (4.5 V ) 5534a RMS I/V 5534a DSDS1796 S/PDIF IN DAI PCM1795 OPT CS8414 PCM1796 Coax PCM1798 I/V 5534a RchOUT BAL Amp (4.5 V ) 5534a RMS SW001-003 Mode Control I/V 5534a DEM-AS/CDAC Daughter Card 3.3-V Regulator +VCC ±AVCC (5 V) (±15 V) Figure 1-1. DEM-DSD1796/PCM1795/PCM1796/PCM1798 Blo
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www.ti.com System Requirements 1.3 System Requirements The DEM-DSD1796/PCM1795/PCM1796/PCM1798 EVM has the following requirements: • ±15-V analog power supply at AVCC+, AVCC–, and GND • 5-V DAC power supply at VCC and GND • S/PDIF input (sampling rate f is up to 96 kHz) connected at the coaxial or optical connector S • RCA analog output connected at CN103 (Lch) and CN104 (Rch); analog full-scale output level is 4.5 V . RMS • PC connected to printer connector CN003 for demonstration software oper
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SW006 Operation Control for DAC www.ti.com 1.7 SW006 Operation Control for DAC Switch SW006 is the register set and reset control for the PCM1796 and DSD1796. The RESET section of the switch must be set to H except to perform a reset operation. Table 1-2 shows the options for SW006. Table 1-2. SW006 Options SW006 RESET Function H Normal operation (default) L Reset operation 1.8 Jumper Connection 2 JP001 selects the normal or inverted BCK signal for 24-bit left-justified or other formats (I S); t
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Chapter 2 SLEU057A–September 2004–Revised May 2009 Schematics, PCB Layout, and Bill of Materials This chapter provides the DEM-DAI/ASDAC and the DEM-AS/CDAC printed circuit boards and schematics. The bill of materials (BOM) 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-DAI1753/54/55 EVM PCBs. Topic .............................................
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DEM-DAI/ASDAC Printed Circuit Board Layout www.ti.com 2.1 DEM-DAI/ASDAC Printed Circuit Board Layout Figure 2-1 through Figure 2-3 illustrate the printed circuit board (PCB) layout for the DEM-DAI/ASDAC. Figure 2-1. DEM-DAI/ASDAC Silkscreen 12 Schematics, PCB Layout, and Bill of Materials SLEU057A–September 2004–Revised May 2009 Submit Documentation Feedback
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www.ti.com DEM-DAI/ASDAC Printed Circuit Board Layout Figure 2-2. DEM-DAI/ASDAC (Top View) SLEU057A–September 2004–Revised May 2009 Schematics, PCB Layout, and Bill of Materials 13 Submit Documentation Feedback
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DEM-DAI/ASDAC Printed Circuit Board Layout www.ti.com Figure 2-3. DEM-DAI/ASDAC (Bottom View) 14 Schematics, PCB Layout, and Bill of Materials SLEU057A–September 2004–Revised May 2009 Submit Documentation Feedback
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www.ti.com DEM-AS/CDAC Printed Circuit Board Layout 2.2 DEM-AS/CDAC Printed Circuit Board Layout Figure 2-4 through Figure 2-6 illustrate the PCB layout for the DEM-AS/CDAC. Figure 2-4. DEM-AS/CDAC Silkscreen Figure 2-5. DEM-AS/CDAC (Top View) SLEU057A–September 2004–Revised May 2009 Schematics, PCB Layout, and Bill of Materials 15 Submit Documentation Feedback
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DEM-AS/CDAC Printed Circuit Board Layout www.ti.com Figure 2-6. DEM-AS/CDAC (Bottom View) 16 Schematics, PCB Layout, and Bill of Materials SLEU057A–September 2004–Revised May 2009 Submit Documentation Feedback
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www.ti.com DEM-DAI/ASDAC Schematics 2.3 DEM-DAI/ASDAC Schematics The schematic for the sections of the DEM-DAI/ASDAC are shown in Figure 2-7 through Figure 2-9. V 1 CC R109 200 CN101 CN102 V XB 3 7 20 XB 3 7 20 DD C105 8200pF (NC) V CC MUTE V CC AV + CC C102 R105 R101 C109 V GND DD 10uF C101 180 10uF 220 CN103 2 7 /16V 10uF V GND /16V DD RCA pj /16V 6 U101 GND (NC) C103 NJM5534 3 R113 4 GND (NC) 0.027uF 100 RST RESET (NC) C111 R103 R107 MDO MDO (NC) 10uF C107 220 180 /16V 8200pF MDI MDI V L R111
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DEM-DAI/ASDAC Schematics www.ti.com V DD 1 18 CN003 57LE 40360 7700(D3) 19 36 C014 0.1 uF U006 74VHC244 1 20 SW006 V CC DSS104 [RST ] 1 2 19 [MDO] 3 18 2 RST [MDI] 4 17 3 MDO 5 16 4 MDI [MC] 6 15 MC 7 14 ML [ML] 8 13 RA001 47k x5 9 12 V 2 CC 10 11 GND CN007 R003 XB-3-7-20 47k CN002 U002 C011 0.1 uF FFC 2BMEP1 D001 1 28 U004 74HCT32 C VERF (L001) 1SS133 2 27 1 14 V C018 Cd/F1 Ce/F2 CC 3 26 2 13 10uF Cc/F0 SDATA C005 R004 4 25 3 12 /16V C006 Cb/E2 ERF 10uF 470 5 24 C007 4 11 0.1uF /16V Ca/E1 M1 6
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www.ti.com DEM-AS/CDAC Schematics 2.4 DEM-AS/CDAC Schematics Figure 2-10 shows the schematic for the sections of the DEM-AS/CDAC. C011 2700pF V 1 R005 820 cc C013 V 1 2 cc 7 10uF/16V 6 U002 NJM5534 3 8 V CC 4 5 (R003) V C010 CC (NC) (R001) C008 C012 C014 Jumper 10uF GND MUTE 22pF 10uF/16V C009 /16V GND V U001 (R004) C015 2700pF DD 0.1uF (NC) DSD1796 V DD R006 820 (NC) GND 1 28 DSDL V 2L (NC) CC C017 GND 2 27 DSDR AGND3L (NC) 10uF RESET 3 26 2 7 DBCK I L /16V V L OUT OUT MDO 4 25 6 I L+ U003 PLRC
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Component Lists www.ti.com 2.5 Component Lists 2.5.1 DEM-AS/CDAC_96/98 Parts List Table 2-1 lists the bill of materials for the DEM-AS/CDAC_96/98. Table 2-1. Bill of Materials Qty RefDes Item Value Mfr Part No Manufacturer Remarks 11 C001, C003, C008, AL ELE capacitor 10 μF/16 V ROA–16V100M ELNA C013, C014, C017, C018, C021, C022, C025, C026 2 C002, C007 Film capacitor 0.1 μF AMFF0050J104 Nissei 2 C004, C009 Chip film capacitor 0.1 μF ECHU1C104JB Matsushita 2 C005, C006 AL ELE capacitor 10 μF/16
