AM417 – Ratiometric instrumentation

amplifier with adjustable output stage

Analog Microelectronics GmbH

An der Fahrt 13, D – 55124 Mainz

July 2008 –Rev 3.1- Page 1/18

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

Fax: +49 (0)6131/91 073-30

Internet: http://www.analogmicro.de

Email: info@analogmicro.de

PRINCIPLE FUNCTION

Integrated instrumentation amplifier with an output stage for the amplification of differential

signals and with an internal current source for the supply of external signal sources. The

output signal is a voltage between 0.5 and 4.5V, ratiometrical to the supply voltage. The

output span could be adjusted by the changeable gain of the output stage.

TYPICAL APPLICATIONS

• Amplification of resistor bridge signals

• Voltage measurement e.g. temperature sensors

• Current measurement via Shunt resistors

• Amplification circuitry for sensing elements e.g. silicon pressure sensing elements

• Differential input circuit for microprocessors/ADC-applications

• Automotive bridge signal conditioning

I

BR = 1mA

AM417

V

CC = 5V

5%

differential

input voltage

0...200mV

V

OUT = 0,5...4,5V

ratiometric