Industrial Converter and Protector IC

AM460

analog microelectronics

April 2003

2/18

TABLE OF CONTENTS

Features

3

General Description

3

Block Diagram

3

Electrical Specifications

4

Boundary Conditions

6

Detailed Description of Functions

6

Operating AM460

8

General information on 2- and 3-wire applications and the use of the current output

8

Setting the voltage gain using the voltage output

9

Setting the output current range using the current output

9

Selecting the supply voltage

9

Connecting OP2 as a current source

10

Connecting OP2 as a voltage reference

11

Operating AM460: Important Points to Note

12

Applications

12

Typical 3-wire application with an input signal referenced to ground

12

Typical 2-wire application with an input signal referenced to ground

14

Block Diagram and Pinout

16

Examples of Possible Applications

17

Delivery

18

Further Reading

18

TABLE OF FIGURES

Table 1: AM460 pinout

16

Figure 1: Block diagram of AM460

3

Figure 2: Block diagram of AM460 with external components (3-wire circuit for current output)

7

Figure 3: Difference between 2- and 3-wire operation

8

Figure 4: Working range in conjunction with the load resistor

10

Figure 5: Connecting up a constant current source

10

Figure 6: Connecting up a voltage reference

11

Figure 7: Typical application for input signals referenced to ground

13

Figure 8: Typical 2-wire application for input signals referenced to ground

14

Figure 9: Block diagram of AM460

16

Figure 10: Pinout

16

Figure 11: Application for input signals referenced to ground (protected output stage, impedance converter etc.)

17

Figure 12: Complex configuration as a peripheral processor IC

17

Figure 13: Conversion of a 0.5...4.5V sensor signal

17