FEATURES

• Wide Supply Voltage Range: 6...35V

• Wide Operating Temperature Range:

–40°C...+85°C

• Adjustable Reference Voltage

Source: 4.5 to 10V

• Wide Common Mode Range Instrumentation

Amplifier

• Adjustable Gain and Offset

• Two–Wire Output: 4...20mA

• Three–Wire Output: 0/4...20mA

• Adjustable Output Current Range

• Protection Against Reverse Polarity

• Current Shutdown with Overvoltage

• Shutdown with Excessive Temperature

APPLICATIONS

• Industrial Process Control

• Sensor Signal Converter (e.g. pressure)

• Programmable Current Source

GENERAL DESCRIPTION

AM402 is a monolithically integrated current

converter which has been specially developed

for the processing of differential bridge signals.

AM402 is suitable for two- and threewire

applications and has four function blocks.

A high-precision instrumentation amplifier

(IA) serves as an input stage. A reference voltage

source, which can be adjusted to values of

between 4.5 and 10V, excites external components

and a voltage-controlled current output

stage converts the voltage signal. It is thus

possible to generate output currents which correspond

to the normal industrial standards

(0/4–20mA, 12 ± 8mA).