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Применения > > Flexible, 4 mA-to-20 mA Pressure Sensor Transmitter with Voltage or Current Drive

Flexible, 4 mA-to-20 mA Pressure Sensor Transmitter with Voltage or Current Drive (CN0295)

The circuit shown in Figure 1 is a flexible current transmitter that converts the differential voltage output from a pressure sensor to a 4 mA-to-20 mA current output.


The circuit is optimized for a wide variety of bridge-based voltage or current driven pressure sensors, utilizes only five active devices, and has a total unadjusted error of less than 1%. The power supply voltage can range from 7 V to 36 V depending on the component and sensor driver configuration.


The input of the circuit is protected for ESD and voltages beyond the supply rail, making it ideal for industrial applications.



Figure 1. Pressure Sensor Signal Conditioning Circuit with 4 mA-to-20 mA Output (Shown in Sensor Voltage Drive Mode) (Simplified Schematic: All Connections and Decoupling Not Shown)

Возможности

  • 4-20mA transmitter
  • Voltage or current drive
  • Optimized for pressure sensors
  • Low Power

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Flexible, 4 mA-to-20 mA Pressure Sensor Transmitter with Voltage or Current Drive  CN0295

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