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).