CS5471 Datasheet, PDF (1/14 Pages) Cirrus Logic – DUAL CHANNEL DELTA SIGMA ANALOG TO DIGITAL CONVERTER

CS5471
Dual-Channel Delta-Sigma Analog-to-Digital Converter
Features
l Synchronous Sampling
l On-chip 1.2 V Reference (25 ppm/°C typ.)
l Power Supply Configurations:
– VA+ = +3 V; VA- = -2 V; VD+ = +3 V
– Supply tolerances ±10%
l Power Consumption
– 10 mW Typical at VD+ = +3 V
l Simple Four-wire Serial Interface
l Charge Pump Driver output generates
negative power supply.
l Ground-Referenced Bipolar Inputs
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.
ORDERING INFORMATION:
CS5471-BS -40°C to +85°C
20-pin SSOP
GAIN
IIN +
IIN -
VIN +
VIN -
VREFIN
VREFOUT
VA+
RESET
VD+
x1, 20
4th Order ∆Σ Modulator
Decimation Filter
x1
2nd Order ∆Σ Modulator
Decimation Filter
x1
Serial
Interface
SE
OWRS
SDO
FSO
SCLK
Voltage
Reference
CLOCK
Pulse Output
Regulator
CPD
AGND
VA-
XIN
DGND
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.cirrus.com
Copyright  Cirrus Logic, Inc. 2001
(All Rights Reserved)
JUL ‘01
DS480PP5
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