Flexible 4~20mA loop-powered pressure sensor transmitter with integrated voltage/current drive

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin
TP-IP4220CZ6 5V 0.35PF breakdown voltage 6V SOT
Shunuo varistor / ESD varistor / product complete / Sunlord first-class agent
Photocoupler

Circuit function and advantage

The circuit shown in Figure 1 is a robust and flexible loop-powered current transducer that converts the differential voltage output of the pressure sensor to a 4 mA to 20 mA current output.

Optimized for a variety of bridge voltage or current driven pressure sensors, this design uses only four active devices with a total unadjusted error of less than 1%. The loop supply voltage ranges from 12 V to 36 V.

The circuit's inputs are ESD-protected and provide voltage protection above the supply rail, making them ideal for industrial applications.

Figure 1. Robust loop-powered pressure sensor signal conditioning circuit with 4 mA to 20 mA output (shown as sensor voltage drive mode), schematic diagram: all connections and decoupling not shown

Figure 1. Robust loop-powered pressure sensor signal conditioning circuit with 4 mA to 20 mA output (shown as sensor voltage drive mode), schematic diagram: all connections and decoupling not shown

N Type Cable Assemblies

N type cable assemblies wridely use in many kinds equipment, skilled operation and speical technology test. Such as LMR Series Cable and RG58, RG178.

N connector

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