AD694 - Analog Devices

AD694 4 ~ 20mA Transmitter

The AD694 is a monolithic current transmitter that accepts high level signal inputs to drive a standard 4–20 mA current loop for the control of valves, actuators, and other devices commonly used in process control. The input signal is buffered by an input amplifier that can be used to scale the input signal or buffer the output from a current mode DAC. Preca.

Features

► 4
  –20 mA, 0
  –20 mA output ranges
► Precalibrated input ranges:
► 0 V to 2 V, 0 V to 10 V
► Precision voltage reference
► Programmable to 2.000 V or 10.000 V
► Single or dual supply operation
► Wide power supply range: 4.5 V to 36 V
► Wide output compliance
► Input buffer amplifier
► Open-loop alarm
► Optional external pass transistor to reduce self-heating errors
► 0.002% typ nonlinearity GENERAL DESCRIPTION The AD694 is a monolithic current transmitter that accepts high level signal inputs to drive a standard 4
  –20 mA current loop for the control of valves, actuators, and other devices commonl.