Pressure Sensors
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Application Notes


AM452 - Voltage-to-Current Converter IC

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Package variants of the V/I-converter IC AM452
AM452 is a voltage-to-current converter IC with integrated protection functions suitable for sensing applications with current driven Wheatstone bridges. It converts a differential input voltage into an adjustable current output signal. The IC is suitable for two- and three-wire operation and compatible with HART-modems.


  • Sensor signal-conditioner
  • Current-loop transmitter
  • Protected V/I-converter
  • Compatible with HART-modems
  • Industrial network driver
  • Industrial process control

Short Specifications

Supply Voltage (VCC)

6 .. 35 V (typ. 24 V)

Input voltage range

0 .. ±400 mV (differential)

Current output

e.g. 4 .. 20 mA (two-wire) and 0 .. 20 mA (three-wire), adjustable

Reference voltage source

5 / 10 V (max. 10 mA)

Current source

0 .. 10 mA, adjustable

Temperature range

-40 °C .. 85 °C

Protected against:

Short circuit, reverse polarity, overvoltage

Package / Delivery forms

SO16(n), on DIL16-adapter, sawn 6″ wafer on blue foil