CS5471
Dual-Channel Delta-Sigma Analog-to-Digital Converter
Features
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Synchronous
Description
The CS5471 is a highly integrated Delta-Sigma (∆Σ) An-
alog-to-Digital Converter (ADC) developed for the Power
Measurement Industry. The CS5471 combines two
∆Σ
ADCs, decimation filters, and a serial interface on a sin-
gle chip. The CS5471 interfaces directly to a current
transformer or shunt to measure current, and resistive
divider or transformer to measure voltage. The product
features a serial interface for communication with a mi-
cro-controller or DSP. The product is initialized and fully
functional upon reset, and includes a Voltage Reference.
Sampling
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On-chip 1.2 V Reference (25 ppm/°C typ.)
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Power Supply Configurations:
– VA+ = +3 V; VA- = -2 V; VD+ = +3 V
– Supply tolerances ±10%
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Power
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Simple
Consumption
– 10 mW Typical at VD+ = +3 V
Four-wire Serial Interface
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Charge Pump Driver output generates
negative power supply.
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Ground-Referenced Bipolar Inputs
ORDERING INFORMATION:
CS5471-BS
-40°C to +85°C
20-pin SSOP
VA+
RESET
VD+
SE
GAIN
IIN +
IIN -
VIN +
VIN -
x1, 20
4th Order
∆Σ
Modulator
Decimation Filter
Serial
Interface
OWRS
SDO
FSO
SCLK
x1
2nd Order
∆Σ
Modulator
Decimation Filter
VREFIN
VREFOUT
x1
Voltage
Reference
CLOCK
Pulse Output
Regulator
CPD
AGND
VA-
XIN
DGND
Preliminary Product Information
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright
Cirrus Logic, Inc. 2001
(All Rights Reserved)
JUL ‘01
DS480PP5
1
CIRRUS [ CIRRUS LOGIC ]
