Pressure Sensors
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Application Notes


AM422-2 - Voltage-to-Current Converter IC (Current-Loop Appl.)

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Package variants of the V/I-converter IC AM422-2
AM422-2 is a voltage-to-current converter IC with integrated protection functions especially suitable for industrial sensing and signal-conditioning in current-loop applications. It converts a single-ended input voltage into a current output signal (e.g. 4 .. 20 mA) with adjustable offset and full-scale current.


  • Sensor signal-conditioner
  • Current-loop transmitter
  • Protected V/I-converter IC
  • Analog back end for µC
  • Voltage driven current source
  • Industrial process control

Short Specifications

Supply Voltage (VCC)

6 .. 35 V (typ. 24 V)

Input voltage range

0 .. 1.15 V (single-ended)

Current output

e.g. 4 .. 20 mA (two-wire current-loop), adjustable

Reference voltage source

5 / 10 V (max. 10 mA)

Temperature range

-40 °C .. 85 °C

Protection functions

Reverse polarity protection, output current limitation

Package / Delivery forms

SO8, on DIL8-adapter, sawn 6″ wafer on blue foil