Industrial V/I Converter and Protector IC

AM462

analog microelectronics

December2006

Analog Microelectronics GmbH

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

12/20

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

POINTS TO NOTE: INITIAL OPERATION OF AM462

Figure 2). Care must be taken that the value of the capacitance does not lie beyond its given

range, even across the range of temperature (see Boundary Conditions on page 7). In 2-wire

2. In a 2-wire setup the power consumption of the overall system (AM462 plus all external

4mA).

3. All AM462 function blocks not required by the application must be connected to a defined (and

allowed) potential.

4. A load resistance of 600

Ω maximum is permitted for the current output.

range given in the boundary conditions on page 7.

APPLICATIONS

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

Figure 7 shows a 3-wire application in which AM462 amplifies and converts a positive voltage

signal referenced to ground. The unused blocks (e.g. OP2) have been set to defined operating points

in the application. Alternatively, these function groups can also be used here (e.g. to supply external

components).

SET

I

INP

OUT

I

R

G

V

I

+

⋅

=

0

8

with

2

1

1

R

R

G

G

GAIN

I

+

=

=

Example: 0…20mA Voltage-To-Current Transmitter

0

0

8

8

R

G

V

I

R

G

V

I

GAIN

INP

SET

I

INP

OUT

⋅

=

+

⋅

=

The following then applies to the gain: