CS5471
Dual-Channel Delta-Sigma Analog-to-Digital Converter
Features
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.
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
ORDERING INFORMATION:
CS5471-BS -40°C to +85°C
20-pin SSOP
VA+
RESET
VD+
SE
GAIN
OWRS
SDO
∆Σ
x1, 20
IIN
IIN
4th Order
2nd Order
Modulator
∆Σ
Modulator
+
-
Decimation Filter
Decimation Filter
Serial
Interface
VIN
VIN
+
-
x1
FSO
SCLK
x1
VREFIN
Voltage
Reference
Pulse Output
Regulator
VREFOUT
CPD
CLOCK
XIN
AGND
VA-
DGND
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Preliminary Product Information
Copyright Cirrus Logic, Inc. 2001
JUL ‘01
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
(All Rights Reserved)
DS480PP5
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