CS5394 Datasheet, PDF (1/22 Pages) Cirrus Logic – 117 DB 48KHZ AUDIO A/D CONVERTER

CS5394
117 dB, 48 kHz Audio A/D Converter
Features
l 24-Bit Conversion
l Complete CMOS Stereo A/D System
— Delta-Sigma A/D Converters
— Digital Anti-Alias Filtering
— S/H Circuitry and Voltage Reference
l Adjustable System Sampling Rates
— including 32 kHz, 44.1 kHz and 48 kHz
l 117 dB Dynamic Range (A-Weighted)
l -103 dB THD + N
l Differential Analog Circuitry
l Internal 64× Oversampling
l Linear Phase Digital Anti-Alias Filtering
— with >117 dB Stopband Attenuation
l Single +5 V Power Supply
l Power Down Mode
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Description
The CS5394 is a complete analog-to-digital converter for
stereo digital audio systems. It performs sampling, ana-
log-to-digital conversion and anti-alias filtering,
generating 24-bit values for both left and right inputs in
serial form. The output sample rate can be up to 50 kHz
per channel.
The CS5394 uses 7th-order, delta-sigma modulation
with 64× oversampling followed by digital filtering and
decimation, which removes the need for an external anti-
alias filter. The ADC uses a differential architecture
which provides excellent noise rejection.
The CS5394 has a linear phase filter with passband of dc
to 22.1 kHz, ± 0.005 dB passband ripple and >117 dB
stopband rejection.
The CS5394 is targeted for the highest performance pro-
fessional audio systems requiring wide dynamic range,
negligible distortion and low noise.
ORDERING INFORMATION
CS5394-KS -10° to 70° C
CDB5394
28-pin SOIC
Evaluation Board
VCOM MCLKA ADCTL
2
7
6
1
VREF
Voltage Reference
AINL- ⁵
+
AINL+ ⁴
-
S/H
AINR- ²⁶
+
AINR+ ²⁷
-
S/H
LP Filter +
-
DAC ^Comparator
LP Filter +
-
DAC ^Comparator
DACTL SCLK LRCK SDATA MCLKD
9 14 13 16 20
Serial Output Interface
Digital
Decimation
Filter
High
Pass
Filter
PDN
19
DFS
18
S/M
17
CAL
10
Digital
Decimation
Filter
Calibration
Microcontroller
High
Pass
Filter
24 3 25 28 23 22
8
21 11 12 15
VA AGND AGND AGND VL LGND TSTO1 TSTO2 VD DGND DGND
Preliminary Product Information
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.crystal.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright © Cirrus Logic, Inc. 1998
(All Rights Reserved)
MAY ‘98
DS258PP4
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