CS5451A Datasheet, PDF (1/14 Pages) Cirrus Logic – SIX CHANNEL DELTA SIGMA ANALOG TO DIGITAL CONVERTER

CS5451A
Six-Channel Delta-Sigma Analog-to-Digital Converter
Features
Synchronous Sampling
On-chip 1. 2V Reference (25ppm/°C typ)
Power Supply Configurations:
– VA+ = +3 V; VA- = -2 V; VD+ = +3 V
– Supply tolerances ±10%
Power Consumption
– 20 mW Typical at VD+ = +3 V
Simple Four-wire Serial Interface
Charge Pump Driver output generates
negative power supply.
Ground-Referenced Bipolar Inputs
Description
The CS5451A is a highly integrated Delta-Sigma (∆Σ)
Analog-to-Digital Converter (ADC) developed for the
Power Measurement Industry. The CS5451A combines
six ∆Σ ADCs, decimation filters, and a serial interface on
a single chip. The CS5451A interfaces directly to a cur-
rent transformer or shunt to measure current, and
resistive divider or transformer to measure voltage. The
product features a serial interface for communication
with a micro-controller or DSP. The product is initialized
and fully functional upon reset, and includes a Voltage
Reference.
ORDERING INFORMATION:
CS5451A-IS -40 °C to +85°C
28-pin SSOP
GAIN
IIN1+
IIN1-
VIN1+
VIN1-
IIN2+
IIN2-
VIN2+
VIN2-
IIN3+
IIN3-
VIN3+
VIN3-
VREFIN
VREFOUT
VA+
RESET
x1, 20
4th Order ∆Σ Modulator
Decimation Filter
x1
4th Order ∆Σ Modulator
Decimation Filter
VD+
x1, 20
4th Order ∆Σ Modulator
x1
4th Order ∆Σ Modulator
x1, 20
4th Order ∆Σ Modulator
x1
4th Order ∆Σ Modulator
x1
Voltage
Reference
Decimation Filter
Decimation Filter
Decimation Filter
Decimation Filter
Serial
Interface
SE
OWRS
SDO
FSO
SCLK
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.
http://www.cirrus.com
Copyright  Cirrus Logic, Inc. 2003
(All Rights Reserved)
OCT ‘03
DS635PP1
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