UNIVERSAL AMPLIFIER IC

AM400

analog microelectronics

October 2005

Analog Microelectronics GmbH

Phone:

+49 (0)6131/91 073 – 0

8/21

An der Fahrt 13, D – 55124 Mainz

Fax:

+49 (0)6131/91 073 – 30

Rev.: 4.2

Internet: http://www.analogmicro.de

Email:

info@analogmicro.de

GAIN

INOP

OUTAD

G

V

V

⋅

=

with













+

=

1

2

1

R

R

G

GAIN

(2)

also be used as an input for signals referenced to ground (see Application 2, Figure 6).

(OP2) which has integrated protection against reverse polarity. The internal gain of OP2 is set to

INDAV

OP

OUT

V

G

V

⋅

=

(3)

V

BG

17

5

IA

7

6

10

18

15

14

13

12

11

20

V

I

16

19

Voltage reference

1

9

OP1

8

Ground

V

S

I

OUT

R

1

R

2

C

1

R

0

T

1

D

1

R

5

3

4

2

AM400-0

V

REF

OP2

OP3

V

OUT

V

ZA

V

INOP

V

SET

V

OUTAD

V

IN+

V

IN-

V

CVREF

V

CVSET

V

OUTIA

R

3

R

4

V

Figure 2: Block diagram of AM400 showing external components (3-wire circuit

with a current output)