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CS5471-BS

Dual-Channel Delta-Sigma Analog-to-Digital Converter

Cirrus Logic 

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

(512) 445 7222 FAX: (512) 445 7581

http://www.cirrus.com

Copyright  Cirrus Logic, Inc. 2001

(All Rights Reserved)

JUL ‘01

DS480PP5

1

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