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CDB4351

Evaluation Board for CS4351

Features

Demonstrates recommended layout and

grounding arrangements.

CS8416 receives S/PDIF, & EIAJ-340-

compatible digital audio.

Headers for External PCM Audio and Control

Input

Requires only a digital signal source and

power supplies for a complete Digital-to-

Analog Converter system.

Description

The CDB4351 evaluation board is an excellent means

for quickly evaluating the CS4351 24-bit, high perfor-

mance stereo D/A converter. Evaluation requires an

analog signal analyzer, a digital signal source, a PC for

controlling the CS4351 (stand alone operation is also

available) and a power supply. Analog line-level outputs

are provided via RCA phono jacks.

The CS8416 digital audio receiver IC. provides the sys-

tem timing necessary to operate the Digital-to-Analog

converter and will accept S/PDIF, and EIAJ-340-compat-

ible audio data. The evaluation board may also be

configured to accept external timing and data signals for

operation in a user application during system

development.

ORDERING INFORMATION

CDB4351 Evaluation Board

CS4351

Analog Outputs

and Muting

Control

Port

Inputs for Clocks

and Data

CS8416

Digital Audio

Interface

OCT ‘04

DS566DB3

Summary of content (16 pages)

PAGE 1
CDB4351 Evaluation Board for CS4351 Features Description Demonstrates recommended layout and grounding arrangements. CS8416 receives S/PDIF, & EIAJ-340compatible digital audio. Headers for External PCM Audio and Control Input Requires only a digital signal source and power supplies for a complete Digital-toAnalog Converter system. The CDB4351 evaluation board is an excellent means for quickly evaluating the CS4351 24-bit, high performance stereo D/A converter.
PAGE 2
CDB4351 TABLE OF CONTENTS 1. CS4351 DIGITAL TO ANALOG CONVERTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. CS8416 DIGITAL AUDIO RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. INPUT FOR CLOCKS AND DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. POWER SUPPLY CIRCUITRY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5.
PAGE 3
CDB4351 CDB4351 SYSTEM OVERVIEW The CDB4351 evaluation board is an excellent means of quickly evaluating the CS4351. The CS8416 digital audio interface receiver provides an easy interface to digital audio signal sources including the majority of digital audio test equipment. The evaluation board also allows the user to supply external PCM clocks and data through a header for system development. The CDB4351 schematic has been partitioned into 6 schematics shown in Figures 2 through 7.
PAGE 4
CDB4351 5. GROUNDING AND POWER SUPPLY DECOUPLING As with any high-performance converter, the CS4351 requires careful attention to power supply and grounding arrangements to optimize performance. Figure 2 details the connections to the CS4351 and Figures 8, 9, and 10 show the component placement and top and bottom layout. The decoupling capacitors are located as close to the CS4351 as possible. Extensive use of ground plane fill in the evaluation board yields large reductions in radiated noise. 6.
PAGE 5
CDB4351 JUMPER / SWITCH PURPOSE POSITION S/C FUNCTION SELECTED J5 Selects source of voltage for the +5V supplies +5 V *+5V_REG Voltage source is +5 V binding post Voltage source is +5 V regulator J6 Selects source of voltage for the VD supplies VD *+3.3V REG Voltage source is VD binding post Voltage source is +3.3 V regulator J7 Selects source of voltage for the VL supply VL *+3.3V REG Voltage source is VL binding post Voltage source is +3.
PAGE 6
Figure 4 PCM Inputs 8416 Digital Audio Receiver Figure 5 MCLK SCLK LRCK SDIN CS4351 Figure 2 Power Figure 7 Figure 1.
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Figure 2.
PAGE 8
Figure 3.
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Figure 4.
PAGE 10
Figure 5.
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Figure 6.
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Figure 7.
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CDB4351 Figure 8.
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CDB4351 Figure 9.
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CDB4351 Figure 10.
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CDB4351 REVISION HISTORY Release DB1 DB2 DB3 Date November 2003 June 2004 October 2004 Changes Initial Release Updated figures 2 and 5 (C48 and R65) Updated schematic and layout figures to match rev B of the PCB 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 Cirrus Logic, Inc.