ADI AD694BR

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Overview

The AD694BR 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. Precalibrated in put spans of 0 V to 2 V and 0 V to 10 V are selected by simple pin strapping; other spans may be programmed with external resistors.

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

Features

Applications

• Proportional operation circuits
• Inverse/same-phase proportional circuit
• Addition operation circuits
• Subtraction operation circuits
• single/dual op amp sum and difference circuits
• Integrator circuits
• Differentiator circuits
• Logarithmic operation circuits
• Exponential operation circuits
• Multiplication circuits