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 20/21

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

Fax:

+49 (0)6131/91 073-30

Internet: http://www.analogmicro.de

Email: info@analogmicro.de

BLOCK DIAGRAM AND PINOUT

Figure 10: Simplified block diagram

Figure 10: Simplified block diagram

Values which can be measured at the pins have indices; the pin name is written in capital

letters.

PIN

NAME

EXPLANATION

1

CVREF

Current/Voltage reference

2

CVSET

Current/Voltage reference set

3

IN+

Positive input

4

IN–

Negative input

5

GAIN

Gain set

6

NC

Not connected

7

VOP

OP1 output

8

IOUT

Current output

9

RS–

Sensing resistor –

10

VCC

Supply voltage

11

RS+

Sensing resistor +

12

VSET

Reference voltage source set

13

ZA

Offset set

14

GND

IC ground

15

VREF

Reference voltage source output

16

SET

Output offset current set

Table 3: Pinout

1

16

2

15

3

14

4

13

5

12

6

11

7

10

89

CVREF

CVSET

IN+

IN-

GAIN

NC

VOP

IOUT

SET

VREF

GND

ZA

VSET

RS+

VCC

RS-

Figure 11: Pinout

VREF

IN+

IN-

SET

VOP

GND

VSET

GAIN

ZA

3

4

IOUT

RS+

RS-

VCC

CVREF

CVSET

V

BG

13

IA

5

14

11

10

9

8

16

12

15

Voltage Reference

1

7

OP1

3

4

2

AM452

OP2

V/I Converter

G

SET

G

VI