AM452 datasheet(2/21 Pages) WOLFSPEED

2 / 21 page

AM452 – Voltage-to-current transducer IC

with a differential input

Analog Microelectronics GmbH

An der Fahrt 13, D – 55124 Mainz

February 2008 - Rev 1.2 - Page 2/21

Phone: +49 (0)6131/91 073-0

Fax:

+49 (0)6131/91 073-30

Internet: http://www.analogmicro.de

Email: info@analogmicro.de

TABLE OF CONTENTS

PRINCIPLE FUNCTION

FEATURES

SCHEMATIC

GENERAL DESCRIPTION

ELECTRICAL SPECIFICATIONS

BOUNDARY CONDITIONS

DETAILED DESCRIPTION OF FUNCTIONS

Instrumentation amplifier (IA)

Operational amplifier stage (OP1)

Zero adjust stage

SET stage

Voltage-to-current converter (V/I converter)

Reference voltage source

Additional operational amplifier OP2

OPERATING AM452

2- and 3-wire applications in general [2]

Differences in the AM452 circuitry with 2- and 3-wire applications

Selecting the supply voltage

Setting the offset and output current range for VIN = 0

OPERATING AM452: IMPORTANT POINTS TO NOTE

DIMENSIONING

APPLICATIONS

Typical 3-wire application with a differential input signal

Typical 2-wire application with a differential input signal

Offset compensation using a voltage divider at SET stage

Using OP2 as a current source

Using OP2 as a voltage source

BLOCK DIAGRAM AND PINOUT

DELIVERY

PACKAGE DIMENSIONS

AM452 Folha de dados(PDF) 2 Page - WOLFSPEED, INC.