CS5321 Datasheet, PDF (1/36 Pages) Cirrus Logic – 24-bit, Variable-bandwidth A/D Converter Chipset

CS5321/22
24-bit, Variable-bandwidth A/D Converter Chipset
Features
z CMOS A/D Converter Chipset
z Dynamic Range
- 130 dB @ 25 Hz Bandwidth
- 121 dB @ 411 Hz Bandwidth
z Delta-sigma Architecture
- Fourth-order Modulator
- Variable Oversampling: 64X to 4096X
- Internal Track-and-hold Amplifier
z CS5321 Signal-to-distortion: 115 dB
z Clock-jitter-tolerant Architecture
z Input Voltage Range: +4.5 V
z Flexible Filter Chip
- Hardware- or Software-selectable Options
- Seven Selectable Filter Corners (-3 dB)
Frequencies: 25, 51, 102, 205, 411, 824 and
1650 Hz
z Low Power Dissipation: <100 mW
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
See page 36.
V_dd1 V_ss1
CS5321
V_dd2 V_ss2
AINR
AIN+
AIN-
VREF+
VREF-
Analog
Modulator
AGND
DGND
CS5322
VD+ SYNC CLKIN CS R/W
LPWR
RESET
OFST
MSYNC
MFLG
MCLK
MDATA
MDATA
HBR
VD+
DGND
CSEL
Digital
Filter
RSEL
SCLK
SID
SOD
ERROR
DRDY
ORCAL
DECA
DECB
DECC
H/S TDATA PWDN USEOR DGND
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