Preliminary Product Information

This document contains information for a new product.

Cirrus Logic reserves the right to modify this product without notice.

1

Copyright

 Cirrus Logic, Inc. 2001

(All Rights Reserved)

P.O. Box 17847, Austin, Texas 78760

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

http://www.cirrus.com

CS5471

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

Features

– VA+ = +3 V; VA- = -2 V; VD+ = +3 V

– Supply tolerances ±10%

– 10 mW Typical at VD+ = +3 V

negative power supply.

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

VREFIN

VREFOUT

+

-

+

-

AGND

XIN

DGND

SE

FSO

SDO

SCLK

Voltage

Reference

Serial

Interface

4th Order

2nd Order

∆Σ Modulator

Decimation Filter

Decimation Filter

x1, 20

x1

x1

VA-

CLOCK

CPD

OWRS

Pulse Output

Regulator

GAIN

VA+

VD+

RESET

IIN

IIN

VIN

VIN

JUL ‘01

DS480PP5