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CS5451A

Part Number	CS5451A
Manufacturer	Cirrus Logic
Description	Delta-sigma Analog-to-digital Converter
Published	Mar 24, 2005
Detailed Description	CS5451A Six-channel, Delta-sigma Analog-to-digital Converter Features • Synchronous Sampling • On-chip 1.2 V Reference...
Datasheet	CS5451A PDF File

Overview

CS5451A Six-channel, Delta-sigma Analog-to-digital Converter Features • Synchronous Sampling • On-chip 1.
2 V Reference (25 ppm/°C typ.
) • Power Supply Configurations: - VA+ = +3 V; VA- = -2 V; VD+ = +3 V - Supply Tolerances: ±10% • Power Consumption - 23 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 ( analog-to-digital converter (ADC) developed for the power measurement industry.
The CS5451A combines six  ADCs, decimation filters, and a serial interface on a single chip.
The CS5451A interfaces directly to a current transformer or shunt to measure current, and to a resistive divider or transformer to measure voltage.
The product features a serial interface for communication with a microcontroller or DSP.
The product is initialized and fully functional upon reset, and includes a voltage reference.
ORDERING INFORMATION: See page 13.
GAIN VA+ RESET IIN1+ IIN1- VIN1+ VIN1- x1, 20 x1 4th Order  Modulator 4th Order  Modulator Decimation Filter Decimation Filter IIN2+ x1, 20 4th Order  Modulator Decimation Filter IIN2- VIN2+ VIN2- x1 4th Order  Modulator Decimation Filter IIN3+ IIN3VIN3+ VIN3- VREFIN VREFOUT x1, 20 4th Order  Modulator x1 4th Order  Modulator x1 Voltage Reference Decimation Filter Decimation Filter Clock VD+ Serial Interface Pulse Output Regulator SE OWRS SDO FSO SCLK CPD AGND VA- XIN DGND http://www.
cirrus.
com Copyright  Cirrus Logic, Inc.
2011 (All Rights Reserved) APR ‘11 DS635F4 CS5451A TABLE OF CONTENTS 1.
PIN DESCRIPTION.
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3 2.
CHARACTERISTICS AND SPECIFICATIONS .
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4 3.
THEORY OF OPERATION .
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CS5451A Delta-sigma Analog-to-digital Converter - Cirrus Logic

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