Voltage-to-Current Converter IC


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.




  • 1.Sensor signal-conditioner
  • 2.Current-loop transmitter
  • 3.Protected V/I-converter
  • 4.Compatible with HART-modems
  • 5.Industrial network driver
  • 6.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
RoHS status compliant


General Documents

Datasheet AM452
Product flyer AM452
IC package catalog


Typical Application Circuits with Blockdiagram

Protected sensor signal-conditioner in three-wire operation with current output signal (e.g. 0 .. 20 mA):
AM452 as protected sensor signal-conditioner with three-wire current output.
Sensor signal-conditioner with protected current-loop output (e.g. 4 .. 20 mA):
AM452 as sensor signal-conditioner with protected current-loop output.


Ordering Codes

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Order number Delivery form
AM452-0-SO16 SO16(n) package
AM452-WAF sawn wafer on 6″ blue foil
AM452-Adapt AM452 soldered to an SO16-DIL16 adapter



No accessories available for this product.