DEM-DSD1796/PCM1795/PCM1796/PCM1798 DSD1796/PCM1795/PCM1796/PCM1798 Evaluation Module User's Guide Literature Number: SLEU057A September 2004 – Revised May 2009
SLEU057A – September 2004 – Revised May 2009 Submit Documentation Feedback
Contents Preface ............................................................................................................................... 5 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 ................................................................................................................ 7 Functional Block Diagram .................................................................................................. 8 EVM Features .................................................
www.ti.com List of Figures 1-1 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 DEM-DSD1796/PCM1795/PCM1796/PCM1798 Block Diagram ...................................................... 8 DEM-DAI/ASDAC Silkscreen ............................................................................................. 12 DEM-DAI/ASDAC (Top View) ............................................................................................ 13 DEM-DAI/ASDAC (Bottom View).............................................................
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).
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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 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 ..................................................................................................
Functional Block Diagram 1.1 www.ti.com Functional Block Diagram Figure 1-1 illustrates the functional block diagram of the DEM-DSD1796/PCM1795/PCM1796/PCM1798 EVM. I/V 5534a CN003 Serial Connector S/PDIF IN OPT Coax DAI CS8414 BAL Amp 5534a LchOUT (4.5 VRMS) BAL Amp 5534a RchOUT (4.5 VRMS) I/V 5534a DSDS1796 PCM1795 PCM1796 PCM1798 I/V 5534a SW001-003 Mode Control I/V 5534a DEM-AS/CDAC Daughter Card 3.3-V Regulator +VCC (5 V) ±AVCC (±15 V) Figure 1-1.
System Requirements www.ti.com 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 fS is up to 96 kHz) connected at the coaxial or optical connector • RCA analog output connected at CN103 (Lch) and CN104 (Rch); analog full-scale output level is 4.5 VRMS.
SW006 Operation Control for DAC 1.7 www.ti.com 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 1.
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 2.1 2.2 2.3 2.4 2.5 ............................
DEM-DAI/ASDAC Printed Circuit Board Layout 2.1 www.ti.com 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 Printed Circuit Board Layout www.ti.com Figure 2-2.
DEM-DAI/ASDAC Printed Circuit Board Layout www.ti.com Figure 2-3.
DEM-AS/CDAC Printed Circuit Board Layout www.ti.com 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 Printed Circuit Board Layout www.ti.com Figure 2-6.
DEM-DAI/ASDAC Schematics www.ti.com 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.
DEM-DAI/ASDAC Schematics www.ti.com VDD 1 18 CN003 57LE 40360 7700(D3) 19 36 C014 0.1 uF U006 74VHC244 SW006 DSS104 1 1 VCC 2 19 2 [MDO] 3 18 3 [MDI] 4 17 5 16 6 15 7 14 8 13 4 [MC] [ML] RA001 47k x5 VCC2 CN002 FFC 2BMEP1 U002 2 3 C005 10uF C006 /16V 0.1uF 4 5 6 U001 TORX173 7 3 (TORX179P) 8 C002 0.01uF 9 10 C003 10uF /16V 11 C001 0.01uF 12 13 14 28 VERF C Cd/F1 Ce/F2 Cc/F0 SDATA CS8414 (L001) C004 0.
DEM-AS/CDAC Schematics www.ti.com 2.4 DEM-AS/CDAC Schematics Figure 2-10 shows the schematic for the sections of the DEM-AS/CDAC. C011 R005 Vcc1 2 GND GND RESET MDO MDI MC ML AGND D_SCLK CLKO/D_BCK P_SCLK DSD_R P_BCK P_LRCK P_DATA DSD_L (R001) C009 0.1uF U001 DSD1796 1 2 3 4 5 C002 6 0.
Component Lists 2.5 www.ti.com 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 11 C001, C003, C008, C013, C014, C017, C018, C021, C022, C025, C026 2 C002, C007 2 C004, C009 2 0 Item Value Mfr Part No 10 µF/16 V ROA–16V100M ELNA Film capacitor 0.1 µF AMFF0050J104 Nissei Chip film capacitor 0.
Component Lists www.ti.com Table 2-2.
Revision History www.ti.com Revision History Changes from Original (September, 2004) to A Revision .............................................................................................. Page • • Updated document format to current standards....................................................................................... 5 Added PCM1795 to devices relevant to this user guide .............................................................................
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.
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.
