CS5542 Datasheet, PDF (1/30 Pages) Cirrus Logic – 22-Bit, Multi-Channel DS ADC Chip Set

CS5542
CS5543
22-Bit, Multi-Channel ∆Σ ADC Chip Set
Features
l Delta-Sigma Architecture:
- 5th Order Modulator
- 22-Bit Resolution
l dc Accuracy (f_BW = 250Hz):
- Integral Linearity: ±0.001 % F.S.
- Differential Linearity: ±0.5 LSBs
- RMS Noise: 1.1 pA_RMS
l Pin Selectable Input Range:
- ±400 nA to ±2.5 µA Full Scale
l 8-Channel Digital FIR Filter
l Self-calibration of Offset and Gain
l Low Power: 50 mW /ch for 8-ch system
Description
The CS5542 / CS5543 chip set is designed to be a com-
plete current measurement data acquisition system.
The CS5542 is a 22-Bit, 2-channel, 5th-order delta sig-
ma modulator. The CS5543 is a monolithic CMOS, 8-
channel digital FIR filter designed to be used with up to
four CS5542’s forming an 8-channel system. The com-
plete system is capable of cascading up to 1024
channels.
The system supports 22-bit measurement resolution
with output conversion rates up to 1 kHz per channel.
JTAG boundary-scan capability is available to facilitate
self-test at the system level.
Potential applications for the CS5542/CS5543 system
are environmental monitoring, process control systems,
color sensing, light measurement, chemical analyzers
and photo-diode transducer applications.
ORDERING INFORMATION
CS5542-KL 0 to 70°C
CS5543-KL 0 to 70°C
28-pin PLCC
28-pin PLCC
VD1+GND1VD2+GND2VD3+GND3
REFGNDL
INL
ICAL
INR
REFGNDR
VA+ VA- GNDL VD+ DGND
5th Order
Delta-Sigma
Modulator
Left
Channel
ICAL ^Bias
MUX ^Regulator
5th Order
Delta-Sigma
Modulator
Right
Channel
Calibra-
tion
and
Digital
Control
Logic
VREF+ VREF- GNDR SEL0SEL1
CS5542
CAPSIZE
MCLK
FSYNC
PDN
C[2.0]
3
CAL[1:0] ₂
Control/Sequencing
CAPSIZE
TCK
TMS
TDI
Test
Access
TDO ^Port
PDN
MCLK
FSYNC
CAL[1:0]
MDATA
[3:0]
4
MDATA[3:0]
C[2:0]
DATACLK
FRAME
Serial I/O
CS5543
3 _DMODE[2:0]
RST
CLKIN
FEGAIN
OE
4 ^DATSEL[3:0]
4 ^DATAIN[3:0]
4
DATAOUT
[3:0]
Preliminary Product Information
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.crystal.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright © Cirrus Logic, Inc. 1997
(All Rights Reserved)
SEP ‘96
DS109PP2
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