
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 1997
(All Rights Reserved)
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
CS5396
CS5397
120 dB, 96 kHz Audio A/D Converter
Features
l
24-Bit Conversion
l
120 dB Dynamic Range (A-Weighted)
l
Low Noise and Distortion
>105 dB THD + N
l
Complete CMOS Stereo A/D System
Delta-Sigma A/D Converters
Digital Anti-Alias Filtering
S/H Circuitry and Voltage Reference
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CS5396 - digital filter optimized for audio
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CS5397 - non-aliasing digital filter
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Adjustable System Sampling Rates
including 32, 44.1, 48 & 96 kHz
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Differential Analog Architecture
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Linear Phase Digital Anti-Alias Filtering
l
10 Tap Programmable Psychoacoustic Noise
Shaping Filter
l
Single +5 V Power Supply
General Description
The CS5396 and CS5397 are complete analog-to-digital
converters for stereo digital audio systems. They per-
form sampling, analog-to-digital conversion and anti-
alias filtering, generating 24-bit values for both left and
right inputs in serial form at sample rates up to 100 kHz
per channel.
The CS5396/97 use a patented 7th-order, tri-level delta-
sigma modulator followed by digital filtering and decima-
tion, which removes the need for an external anti-alias
filter. The ADCs use a differential architecture which pro-
vides excellent noise rejection.
The CS5396 has a linear phase filter optimized for audio
applications with ±0.005 dB passband ripple and
>117 dB stopband rejection. The CS5397 has a non-
aliasing filter response with ±0.005 passband ripple and
>117 dB stopband attenuation. Other features available
in both the CS5396 and CS5397 are an optional low
group delay filter and a unique psychoacoustic noise
shaping filter which subjectively truncates the output to
16, 18 or 20 bits while 24-bit sound quality is preserved.
The CS5396/97 are targeted for the highest perfor-
mance professional audio systems requiring wide
dynamic range, negligible distortion and low noise.
ORDERING INFORMATION
CS5396-KS
CS5397-KS
CDB5396/97
-10° to 50° C
-10° to 50° C
28-pin SOIC
28-pin SOIC
Evaluation Board
Voltage Reference
Serial Output Interface
Psychoacoustic
Filter
Digital Decimation
Filter
(with Low Group
Delay Options)
LP Filter
DAC
-
+
-
+
S/H
LP Filter
DAC
-
+
-
+
S/H
AINR+
VA
SCLK
SDATA1
MCLKD
CS
CDIN
CCLK
VCOM
MCLKA
LRCK
ADCTL
LGND
TST0
AINR-
Comparator
Comparator
AINL+
AINL-
VREF
AGND1
AGND2 AGND0 VL
TST1
VD
DGND
Calibration
Microcontroller
Calibration
SRAM
DACTL
Digital Decimation
Filter
(with Low Group
Delay Options)
Serial
Control
Port
CAL
SDATA2
SEP ‘97
DS229PP2