CS5396
CS5397
120 dB, 96 kHz Audio A/D Converter
Features
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.
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
l CS5396 - digital filter optimized for audio
l CS5397 - non-aliasing digital filter
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.
l Adjustable System Sampling Rates
including 32, 44.1, 48 & 96 kHz
l Differential Analog Architecture
l Linear Phase Digital Anti-Alias Filtering
l 10 Tap Programmable Psychoacoustic Noise
Shaping Filter
l Single +5 V Power Supply
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 -10° to 50° C 28-pin SOIC
CS5397-KS -10° to 50° C 28-pin SOIC
CDB5396/97
Evaluation Board
VCOM
MCLKA
ADCTL
DACTL CAL SCLK LRCK SDATA1 SDATA2 MCLKD
CS
Serial
Serial Output Interface
Control
Voltage Reference
VREF
CDIN
CCLK
Port
AINL-
AINL+
+
+
LP Filter
Digital Decimation
+
-
Filter
(with Low Group
Delay Options)
-
-
S/H
S/H
Comparator
Psychoacoustic
Filter
DAC
Digital Decimation
Filter
(with Low Group
AINR-
AINR+
LP Filter
+
-
Delay Options)
Comparator
DAC
Calibration
SRAM
Calibration
Microcontroller
VA AGND1 AGND2 AGND0 VL LGND
TST0
TST1 VD
DGND
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Preliminary Product Information
Cirrus Logic, Inc.
Copyright Cirrus Logic, Inc. 1997
(All Rights Reserved)
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
SEP ‘97
DS229PP2
1