CS5320/21/22
24-Bit Variable Bandwidth A/D Converter Chipset
Features
Description
The CK5320 and CK5321 Chipsets function as a unique
A/D converter intended for very high resolution measure-
ment of signals below 1500 Hz. The CK5320 Chipset is
a cost effective commercial grade solution for applica-
tions which require a high dynamic range A/D converter.
The chipsets perform sampling, A/D conversion, and
anti-alias filtering.
l CMOS A/D Converter Chipset
l Dynamic Range
- 130 dB @ 25 Hz Bandwidth
- 121 dB @ 411 Hz Bandwidth
l Delta-Sigma Architecture
- Fourth-Order Modulator
The CS5320 and CS5321 use Delta-Sigma modulation
to produce highly accurate conversions. The ∆Σ modula-
tor oversamples, virtually eliminating the need for
external analog anti-alias filters. The CS5322 linear-
phase FIR digital filter decimates the output to any one
of seven selectable update periods: 16, 8, 4, 2, 1, 0.5
and 0.25 milliseconds. Data is output from the digital fil-
ter in a 24-bit serial format.
- Variable Oversampling: 64X to 4096X
- Internal Track-and-Hold Amplifier
l CS5321 Signal-to-Distortion: 115 dB
l Clock Jitter Tolerant Architecture
l Input Voltage Range: +4.5 V
l Flexible Filter Chip
- Hardware or Software Selectable Options
ORDERING INFORMATION*
- Seven Selectable Filter Corners (-3 dB)
Frequencies: 25, 51, 102, 205, 411, 824 and
1650 Hz
Chip Sets
Kits
CS5320-KL & CS5322-KL CK5320-KL1
CS5321-BL & CS5322-KL CK5321-KL1
CS5321-BL & CS5322-BL CK5321-BL1
l Low Power Dissipation: <100 mW
* Refer to Table 5
CS5320/21
CS5322
V
V
V
V
ss2
VD+
SYNC CLKIN CS R/W
dd1
ss1
dd2
LPWR
OFST
RESET
RSEL
SCLK
SID
MSYNC
SOD
MFLG
MCLK
MDATA
AINR
AIN+
Digital
Filter
ERROR
DRDY
ORCAL
DECA
DECB
DECC
Analog
Modulator
AIN-
MDATA
HBR
VD+
DGND
CSEL
VREF+
VREF-
AGND
DGND
H/S TDATA PWDN USEOR DGND
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Preliminary Product Information
OCT ‘99
DS454PP1
Copyright Cirrus Logic, Inc. 1999
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
(All Rights Reserved)
1