Industrial V/I Converter and Protector IC

AM462

analog microelectronics

December2006

Analog Microelectronics GmbH

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

16/20

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

According to Equation 13 the minimum output current generated by the input offset is calculated

as:

mA

2

27

8

1

1

6.37

6,37

V

5

.

0

8

1

0

9

8

9

min

min

≈

Ω

⋅

⋅

+

⋅

=

⋅

+

⋅

=

R

R

R

R

V

I

IN

OUT

4

3

4

0

!

2

mA

2

R

R

R

R

V

I

REF

SET

+

⋅

=

=

⇒

3

.

45

1

mA

2

27

2

V

5

1

2

0

4

3

≈

−

⋅

Ω

⋅

=

−

=

SET

REF

I

R

V

R

R

Observing the given boundary conditions, the following values are obtained for the external

components:

Ground

V

IN

R

5

R

L

1

Single-ended

input voltage

Connections setting unused function blocks in a defined operating point

3-wire connection

V

BG

1

2

AM462

OP2

R

8

R

9

4

OP1

5

3

R

3

C

1

R

0

14

6

13

15

16

11

8

9

10

V

I

R

4

T

1

D

1

Voltage reference

V

S

I

OUT

Figure 9:

Converting an input signal with an