CS5394
117 dB, 48 kHz Audio A/D Converter
Features
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
I
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
—
including 32 kHz, 44.1 kHz and 48 kHz
l
Adjustable System Sampling Rates
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
l
Single +5 V Power Supply
l
Power Down Mode
—
with >117 dB Stopband Attenuation
28-pin SOIC
Evaluation Board
VCOM
2
1
MCLKA
7
ADCTL
6
DACTL SCLK LRCK SDATA MCLKD
9
14
13
16
20
19
PDN
DFS
S/M
CAL
VREF
Voltage Reference
Serial Output Interface
18
17
AINL- 5
AINL+ 4
S/H
+
-
LP Filter
+
-
Digital
Decimation
Filter
High
Pass
Filter
10
DAC
AINR-
AINR+
26
27
S/H
DAC
+
-
Comparator
Digital
Decimation
Filter
Calibration
Microcontroller
22
LGND
8
21
11
12
15
High
Pass
Filter
LP Filter
+
-
Comparator
24
VA
3
25
28
23
VL
AGND AGND AGND
TSTO1 TSTO2 VD
DGND DGND
Preliminary Product Information
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
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
1
CIRRUS [ CIRRUS LOGIC ]
