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

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.




  • 1.Sensor signal-conditioner
  • 2.Current-loop transmitter
  • 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. 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
RoHS status compliant


General Documents

Datasheet AM422-2
Product flyer AM422-2
IC package catalog


Typical Application Circuit with Blockdiagram

Signal-conditioner with protected current-loop output (e.g. 4 .. 20 mA):
AM22-2 as signal-conditioner with protected current-loop output.


Ordering Codes

Order number Delivery form
AM422-2-0-SO8 SO8 package
AM422-2-WAF sawn wafer on 6″ blue foil
AM422-2-Adapt AM422-2 soldered to an SO8-DIL8 adapter



Order Number Description
BBAM422-2 An easily adaptable, preassembled breadboard. Suitable for first experiments using AM422-2