INDUSTRIAL VOLTAGE AMPLIFIER IC

AM401

analog microelectronics

Mars 2006

Analog Microelectronics GmbH

Phone:

+49 (0)6131/91 073 – 0

14/21

An der Fahrt 13, D – 55124 Mainz

Fax:

+49 (0)6131/91 073 – 30

Rev. 2.3

Internet: http://www.analogmicro.de

Email:

info@analogmicro.de

Example 4:

Input voltage (differential) of 0...250mV and output voltage range of 0.5...4.5V

If VIN = 0...250mV, IREF ≥ 1mA, R1/R2 = 2.2 and R3/R4 = 4.8 the values of the external components

are as follows:

R1 ≈ 100kΩ

R2 ≈ 47kΩ

R3 ≈ 75kΩ

R4 ≈ 15.5kΩ

VOFFSET = 0.5V

C1 = 2.2µF

C2 = 10nF

C

1

C

2

R

2

R

3

R

4

V

OFFSET

R

1

Ground

V

OUT

V

CC

V

IN

1

2

3

4

14

13

5

6

11

15

12

V

BG

CVREF

CVSET

IN+

IN_

GND

ZA

OUTIA

INOP

7

8

GAIN

VOUT

VCC

VREF

VSET

Voltage Reference

AM401

+

_

OP2

+

_OP1

+

_ IA

Figure 5:

Application as a bridge amplifier for an output voltage of 0.5...4.5V