Voltage-to-Current Converter IC for 3-Wire Operation

AM422-1 is a compact voltage-to-current converter IC for 3-wire operation with integrated protection functions and voltage source. It converts a single-ended input voltage into a current output signal with adjustable offset and gain. The IC is especially suitable for price sensitive industrial applications with single-ended input signals.




  • 1.Sensor signal-conditioner
  • 2.Industrial current output driver
  • 3.Protected V/I-converter IC
  • 4.Analog back end for µC
  • 5.Voltage driven current source
  • 6.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. 0 .. 20 mA or 4 .. 20 mA (three-wire), 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
RoHS status compliant


General Documents

Datasheet AM422-1
Product flyer AM422-1
IC package catalog


Typical Application Circuit with Blockdiagram

Protected signal-conditioning circuit with three-wire current output (e.g. 0 .. 20 mA):
AM22-1 as protected signal-conditioner with three-wire current output.


Ordering Codes

Order number Delivery form
AM422-1-0-SO8 SO8 package
AM422-1-WAF sawn wafer on 6″ blue foil
AM422-1-Adapt AM422-1 soldered to an SO8-DIL8 adapter



Order Number Description
BBAM422-1 An easily adaptable, preassembled breadboard. Suitable for first experiments using AM422-1