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Connecting a 4-20mA signal to AD7730 input

Question asked by jartigas on Jan 17, 2018
Latest reply on Jan 31, 2018 by JellenieR

Hi everyone,

 

I have a designed equipment with an load cell input (AD7730) and for another application, I need to connect a 4-20mA signal from an pressure sensor. The power supply of presuure sensor is external, and I tied the 4-20mA to in+ and in- signals of AD7730 throught 1 ohm resistor for converting the 4-20mA to 4-20mV, but the readings are not stable. It´s this connection suitable for doing this? It exist an equivalent chip of AD7730 with an input range higher?

 

Regards.

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