CS5451A
Six-Channel Delta-Sigma Analog-to-Digital Converter
Features
Synchronous Sampling
On-chip 1. 2V Reference (25ppm/掳C typ)
Power Supply Configurations:
鈥?VA+ = +3 V; VA- = -2 V; VD+ = +3 V
鈥?Supply tolerances 卤10%
Description
The CS5451A is a highly integrated Delta-Sigma (鈭單?
Analog-to-Digital Converter (ADC) developed for the
Power Measurement Industry. The CS5451A combines
six
鈭單?/div>
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.
Power Consumption
鈥?20 mW Typical at VD+ = +3 V
Simple Four-wire Serial Interface
Charge Pump Driver output generates
negative power supply.
Ground-Referenced Bipolar Inputs
ORDERING INFORMATION:
CS5451A-IS
-40
掳C
to +85掳C
28-pin SSOP
VA+
GAIN
IIN1+
IIN1-
VIN1+
VIN1-
4th Order
鈭單?/div>
Modulator
4th Order
鈭單?/div>
Modulator
RESET
VD+
x1, 20
Decimation Filter
x1
Decimation Filter
IIN2+
IIN2-
VIN2+
VIN2-
x1, 20
4th Order
鈭單?/div>
Modulator
Decimation Filter
SE
x1
4th Order
鈭單?/div>
Modulator
4th Order
鈭單?/div>
Modulator
Decimation Filter
Serial
Interface
OWRS
SDO
FSO
SCLK
IIN3+
IIN3-
VIN3+
VIN3-
VREFIN
VREFOUT
x1, 20
Decimation Filter
x1
4th Order
鈭單?/div>
Modulator
Decimation Filter
x1
Voltage
Reference
Clock
Pulse Output
Regulator
CPD
AGND
VA-
XIN
DGND
Preliminary Product Information
http://www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright
铮?/div>
Cirrus Logic, Inc. 2003
(All Rights Reserved)
OCT 鈥?3
DS635PP1
1
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