Cirrus Logic CS5331A - Manual

Copyright
 Cirrus Logic, Inc. 2011
(All Rights Reserved) http://www.cirrus.com
8-Pin, Stereo A/D Converter for Digital Audio
Features
 Single +5 V Power Supply
 18-Bit Resolution
 94 dB Dynamic Range
 Linear Phase Digital Anti-Alias Filtering
– 0.05 dB Passband Ripple
– 80 dB Stopband Rejection
 Low Power Dissipation: 150 mW
– Power-Down Mode for Portable
Applications
 Complete CMOS Stereo A/D System
– Delta-Sigma A/D Converters
– Digital Anti-Alias Filtering
– S/H Circuitry and Voltage Reference
 Adjustable System Sampling Rates including
32, 44.1, and 48 kHz
General Description
The CS5330A/31A is a complete stereo analog-to-digi-
tal converter that performs antialias filtering, sampling
and analog-to-digital conversion generating 18-bit val-
ues for both left and right inputs in serial form. The
output sample rate can be infinitely adjusted between
2 kHz and 50 kHz.
The CS5330A/31A operates from a single +5 V supply
and requires only 150 mW for normal operation, making
it ideal for battery-powered applications.
The ADC uses delta-sigma modulation with 128X over-
sampling, followed by digital filtering and decimation,
which removes the need for an external anti-alias filter.
The linear-phase digital filter has a passband to
21.7 kHz, 0.05 dB passband ripple and >80 dB stop-
band rejection. The device also contains a high-pass fil-
ter to remove DC offsets.
The device is available in an 8-pin SOIC package in
both Commercial (
-10° to +70° C) and Automotive grades
(-40° to +85° C) . Please refer to “Ordering Information” on
page 16 for complete details.
High
Pass
Filter
AINR
S/H
AGND
AINL
S/H
DAC
Serial Output Interface
Voltage Reference
Comparator
Comparator
LP Filter
LP Filter
VA+
SCLK
Digital Decimation
Filter
SDATA
MCLK
DAC
High
Pass
Filter
LRCK
8
5
6
4 2 3
1
7
Digital Decimation
Filter
MAY '11
DS138F6
CS5330A/31A