CS5321/22
24-bit, Variable-bandwidth A/D Converter Chipset
Features
CMOS A/D Converter Chipset
Dynamic Range
-
130 dB @ 25 Hz Bandwidth
-
121 dB @ 411 Hz Bandwidth
Description
The CS5321/CS5322 chipset functions as a unique
A/D converter intended for very high-resolution
measurement of signals below 1600 Hz. It is specif-
ically designed for applications that require both a
high dynamic range and a low total harmonic distor-
tion. The chipset performs sampling, A/D
conversion, and anti-alias filtering.
The CS5321 uses Delta-Sigma modulation to pro-
duce highly accurate conversions. The
∆Σ
modulator 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 peri-
ods: 16, 8, 4, 2, 1, 0.5, and 0.25 milliseconds. Data
is output from the digital filter in a 24-bit serial
format.
ORDERING INFORMATION
Delta-sigma Architecture
-
Fourth-order Modulator
-
Variable Oversampling: 64X to 4096X
-
Internal Track-and-hold Amplifier
CS5321 Signal-to-distortion: 115 dB
Clock-jitter-tolerant Architecture
Input Voltage Range: +4.5 V
Flexible Filter Chip
-
Hardware- or Software-selectable Options
-
Seven Selectable Filter Corners (-3 dB)
Frequencies: 25, 51, 102, 205, 411, 824 and
1650 Hz
Low Power Dissipation: <100 mW
See
CS5321
V
dd1
V
ss1
V
dd2
V
ss2
LPWR
OFST
MSYNC
AINR
AIN+
AIN-
VREF+
VREF-
AGND
DGND
HBR
Analog
Modulator
MDATA
MFLG
MCLK
MDATA
VD+
DGND
CSEL
H/S
TDATA
RESET
VD+
SYNC
CS5322
CLKIN
CS R/W
RSEL
SCLK
SID
SOD
Digital
Filter
ERROR
DRDY
ORCAL
DECA
DECB
DECC
PWDN
USEOR
DGND
Copyright
©
Cirrus Logic, Inc. 2005
(All Rights Reserved)
SEP ‘05
DS454F2
CIRRUS [ CIRRUS LOGIC ]
