Optimized Circuit Design for HART Enabled 4 mA to 20 mA Inputs

4 Oct 2018

This article from Analog Devices covers the HART (highway addressable remote transducer) protocol that allows for bidirectional 1.2 kHz/2.2 kHz FSK (frequency shift keying) modulated digital communication over traditional analog 4 mA to 20 mA current loops. This allows for interrogation of the sensor/actuator, and provides significant advantages during equipment installation, monitoring, and maintenance.

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