CDB5381 Evaluation Board for CS5381 Features Description The CDB5381 evaluation board is an excellent means Demonstrates recommended layout and for quickly evaluating the CS5381 24-bit, stereo A/D con- grounding arrangements verter. Evaluation requires a digital signal analyzer, an CS8406 generates S/PDIF, and EIAJ-340 analog signal source, and a power supply. compatible digital audio Also included is a CS8406 digital audio interface trans- Requires only an analog signal source and mitter which generates S/PDIF, and EIAJ-340 power supplies for a complete Analog-to- compatible audio data. The digital audio data is available Digital-Converter system via RCA phono and optical connectors. ORDERING INFORMATION CDB5381 Evaluation Board CS8406 S/PDIF AES/EBU ANALOG CS5381 OUTPUT INPUT S/PDIF TRANSMITTER I/O FOR CLOCKS AND DATA Cirrus Logic, Inc. FEB 03 Copyright Cirrus Logic, Inc. 2003 www.cirrus.com (All Rights Reserved) DS563DB1 1CDB5381 TABLE OF CONTENTS 1. CDB5381 SYSTEM OVERVIEW .............................................................................................. 3 2. CS8406 DIGITAL AUDIO TRANSMITTER ............................................................................... 3 3. INPUT/OUTPUT FOR CLOCKS AND DATA ........................................................................... 3 4. POWER SUPPLY CIRCUITRY ................................................................................................. 3 5. GROUNDING AND POWER SUPPLY DECOUPLING ............................................................ 3 6. ANALOG INPUT FILTER ......................................................................................................... 3 LIST OF FIGURES Figure 1. System Block Diagram and Signal Flow .......................................................................... 5 Figure 2. Differential Analog Audio Input......................................................................................... 6 Figure 3. CS5381 ............................................................................................................................ 7 Figure 4. Level Shifters ................................................................................................................... 8 Figure 5. I/O for Clocks/Data........................................................................................................... 9 Figure 6. CS8406 Digital Audio Interface ........................................................................................ 9 Figure 7. Reset Circuit................................................................................................................... 10 Figure 8. Power Circuit.................................................................................................................. 11 Figure 9. Top Layer Silkscreen ..................................................................................................... 12 Figure 10. Top Layer ..................................................................................................................... 13 Figure 11. Bottom Layer................................................................................................................ 14 LIST OF TABLES Table 1. System Connections ........................................................................................................4 Table 2. CDB5381 Jumper and Switch Settings ............................................................................ 4 Contacting Cirrus Logic Support For all product questions and inquiries contact a Cirrus Logic Sales Representative. To find one nearest you go to www.cirrus.com IMPORTANT NOTICE Preliminary product information describes products that are in production, but for which full characterization data is not yet available. Advance product information describes products that are in development and subject to development changes. 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