Voltage-to-Current Converter IC

AM402 is a voltage-to-current converter IC with integrated protection functions and voltage source. It converts a differential input voltage into a current output signal with adjustable offset and gain. AM402 is particularly suitable for industrial sensing and signal-conditioning in two- or three-wire applications.




  • 1.Sensor signal-conditioner
  • 2.Current-loop transmitter
  • 3.Industrial current output driver
  • 4.Protected V/I-converter
  • 5.Factory automation
  • 6.Industrial process control

Short Specifications

Supply voltage (VCC) 6 .. 35 V (typ. 24 V)
Input voltage range 0 .. 580 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)
Temperature range -40 °C .. 85 °C
Protection functions Short circuit protection, reverse polarity protection, output current limitation
Package / Delivery forms SO16(n), on DIL16-adapter, sawn 6″ wafer on blue foil
RoHS status compliant


General Documents

Datasheet AM402
Product flyer AM402
IC package catalog


Typical Application Circuits with Blockdiagram

Sensor signal-conditioner with protected two-wire current-loop output (e.g. 4 .. 20 mA):
AM402 as sensor signal-conditioner with protected two-wire output.
Protected three-wire sensor signal-conditioner with current output signal (e.g. 0 .. 20 mA):
AM402 as sensor signal-conditioner with three-wire current output.


Ordering Codes

Order number
AM402-0-SO16 SO16(n) package
AM402-WAF sawn wafer on 6″ blue foil
AM402-Adapt AM402 soldered to an SO16-DIL16 adapter



Order Number Description
BBAM402 An easily adaptable, preassembled breadboard. Suitable for first experiments using AM402