Instruction Manual

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Table Of Contents

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Evaluation Board for CS4349

Features

 Stand-Alone or PC GUI Board Control

 CS8416 Receives S/PDIF-Compatible Digital

Audio

 Headers for External PCM Audio Input

 Demonstrates Recommended Layout and

Grounding Arrangements.

 Requires Only a Digital Signal Source and

Power Supplies for a Complete Digital-to-

Analog Converter System

Description

The CDB4349 evaluation board is an excellent platform

for quickly evaluating the CS4349 24-bit, 24-pin, stereo

D/A converter. Evaluation requires an analog signal an-

alyzer, a digital signal source, a PC for controlling the

CS4349 (only required for Control Port Mode), 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-compatible audio da-

ta. 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

CDB4349 Evaluation Board

CS4349

Analog Outputs

and Filtering

Inputs for PCM

Clocks and Data

CS8416

Digital Audio

Interface

Hardware or

Software Board

Control

JUN '08

DS782DB1

CDB4349

Summary of content (24 pages)

PAGE 1
CDB4349 Evaluation Board for CS4349 Features Description Stand-Alone or PC GUI Board Control The CDB4349 evaluation board is an excellent platform for quickly evaluating the CS4349 24-bit, 24-pin, stereo D/A converter. Evaluation requires an analog signal analyzer, a digital signal source, a PC for controlling the CS4349 (only required for Control Port Mode), and a power supply. Analog line-level outputs are provided via RCA phono jacks.
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CDB4349 TABLE OF CONTENTS 1. CDB4349 SYSTEM OVERVIEW ............................................................................................................ 4 2. CS4349 DIGITAL-TO-ANALOG CONVERTER ..................................................................................... 4 3. CS8416 DIGITAL AUDIO RECEIVER .................................................................................................... 4 4. INPUT FOR CLOCKS AND DATA .........................................................
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CDB4349 Figure 38. CS8416 S/PDIF Input .............................................................................................................. 17 Figure 39. Control Port .............................................................................................................................. 18 Figure 40. Power ....................................................................................................................................... 19 Figure 41. Silkscreen Top .......................
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CDB4349 1. CDB4349 SYSTEM OVERVIEW The CDB4349 evaluation board is an excellent platform for quickly evaluating the CS4349. 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 headers for system development. The CDB4349 schematic has been partitioned into 6 pages, shown in Figures 35 through 40.
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CDB4349 6. POWER SUPPLY CIRCUITRY Power is supplied to the evaluation board by three binding posts (GND, +12V, and -12V), as shown in Figure 40. The ‘+12V’ and ‘-12V’ terminals supply the active output filters. The +3.3 V and +5.0 V circuitry is powered by regulators fed by the ‘+12V’ terminal. Headers J3, J4, and J7 allow the user to either select +3.3 V or +5.0 V supplies for the various CS4349 voltage supply pins.
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CDB4349 9. BOARD CONNECTIONS AND SETTINGS Board connections and settings are shown in Table 1, Table 2, and Table 3.
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CDB4349 10.PERFORMANCE PLOTS Test conditions (unless otherwise specified): TA = 25° C; Measurement bandwidth is 20 Hz to 20 kHz (unweighted); VA = 5 V; VLC = VLS = 3.3 V; Input signal is a 0 dBFS 1 kHz sine wave; Input data resolution is 24 bits, Left-Justified; Channel A output = blue traces; Channel B output = green traces.
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CDB4349 +0 +40 +35 -10 +30 -20 +25 +20 -30 +15 -40 d B r +10 d B r -50 -60 A A +5 +0 -5 -10 -70 -15 -80 -20 -25 -90 -30 -100 -35 -110 -120 -100 -80 -60 -40 -20 -40 -140 +0 -120 -100 -80 dBFS Figure 7. THD+N vs Level 1 kHz, FS = 48 kHz -40 -20 +0 Figure 8. Fade-to-Noise Linearity 1 kHz, FS = 48 kHz 2 +0 1.75 -10 1.5 -20 1.25 -30 1 -40 750m -50 500m -60 0 d B r -250m A 250m V -60 dBFS -70 -80 -90 -500m -100 -750m -110 -1 -120 -1.25 -130 -1.
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CDB4349 +0 +0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 d B r d B r -70 -70 -80 -80 A A -90 -90 -100 -100 -110 -110 -120 -120 -130 -130 -140 -140 -150 20 50 100 200 500 1k 2k 5k 10k -150 20 20k 50 100 200 500 1k 2k 5k 10k 20k Hz Hz Figure 13. FFT -60 dBFS, FS = 96 kHz Figure 14.
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CDB4349 +40 2 +35 1.75 +30 1.5 +25 1.25 +20 1 +15 750m +10 500m d B r +5 A -5 -250m -10 -500m -15 -750m 250m +0 V 0 -20 -1 -25 -1.25 -30 -1.5 -35 -1.75 -40 -140 -120 -100 -80 -60 -40 -20 -2 0 +0 250u 500u 750u dBFS Figure 19.
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CDB4349 +0 +0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 d B r d B r -70 -70 -80 -80 A A -90 -90 -100 -100 -110 -110 -120 -120 -130 -130 -140 -140 -150 20 -150 50 100 200 500 1k 2k 5k 10k 20k 20k 40k 60k 80k 100k 120k Hz Hz Figure 25. FFT No Input, FS = 192 kHz Figure 26.
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CDB4349 2 +0 1.75 -10 1.5 -20 1.25 -30 1 -40 750m -50 500m -60 d B r 250m V 0 -70 -80 -250m A -90 -500m -750m -100 -1 -110 -1.25 -120 -1.5 -130 -1.75 -140 -2 0 200u 400u -150 20 600u sec 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 31. Impulse Response, FS = 192 kHz Figure 32. FFT Crosstalk Ch. A to Ch. B 1 kHz, FS = 192 kHz +0 -10 -20 -30 -40 -50 -60 d B r -70 -80 A -90 -100 -110 -120 -130 -140 -150 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 33.
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DS782DB1 11.SCHEMATICS PCM source select Serial Control Port Figure 3 PCM Header Figure 3 Power I 2 C/SPI Header Figure 3 PCM Clocks/Data PCM mux Analog Outputs PCM Clocks/Data PCM Clocks/Data POUTA Figure 3 Figure 3 CS8416 S/PDIF Input CS4349 DIF[2:0] POUTB Figure 3 PCM source select CS8416 serial port format Figure 3 Figure 4 Figure 3 Hardware Control Switches Figure 3 CDB4349 13 Figure 34.
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Figure 35.
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DS782DB1 15 CDB4349 Figure 36.
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DS782DB1 CDB4349 16 Figure 37.
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DS782DB1 17 CDB4349 Figure 38.
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DS782DB1 18 CDB4349 Figure 39.
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DS782DB1 19 CDB4349 Figure 40.
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DS782DB1 12.LAYOUT CS4349 CDB4349 20 CDB4349 Figure 41.
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DS782DB1 CDB4349 21 Figure 42.
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DS782DB1 CDB4349 22 Figure 43.
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CDB4349 13.
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CDB4349 Contacting Cirrus Logic Support For all product questions and inquiries, contact a Cirrus Logic Sales Representative. To find the one nearest to you, go to www.cirrus.com IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied).