Industrial V/I Converter and Protector IC

AM462

analog microelectronics

December2006

Analog Microelectronics GmbH

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

13/20

An der Fahrt 13, D – 55124 Mainz

Fax:

+49 (0)6131/91 073 – 30

Rev. 2.4

Internet: http://www.analogmicro.de

Email:

info@analogmicro.de

32

.

4

V

1

mA

20

27

8

8

0

≈

⋅

Ω

⋅

=

=

INP

OUT

GAIN

V

I

R

G

⇒

32

.

3

1

32

.

4

2

1

=

−

=

R

R

Observing the boundary conditions (page 7), the following values are obtained for the external

components:

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

It must be ensured that in 2-wire operation an additional current load (use of current/voltage source)

is limited to 4mA due to the domestic current supply and limitation.

SET

I

INP

OUT

I

R

G

V

I

+

⋅

=

0

8

with

2

1

1

R

R

G

G

GAIN

I

+

=

=

and

4

3

4

0

2

R

R

R

R

V

I

REF

SET

+

⋅

=

Ground

R

5

R

L

1

Single-ended

input voltage

Connections setting unused function blocks to a defined operating point

3-wire connection

1

2

AM462

OP2

R

1

R

2

4

OP1

5

3

Voltage Reference

R

0

14

6

13

11

8

9

10

V

I

T

1

D

1

C

1

15

16

I

V

INP

V

S

I

OUT

V

BG

Figure 7:

Typical application for input signals referenced to ground