In electronics, a transimpedance amplifier (TIA) is a current-to-voltage converter, most often implemented using an operational amplifier. The TIA can be used to. Questions about Using LM358. To create a voltage amp. Of the output of the current to voltage 'first stage converter' you have? A ngspice Circuit using LM358.

Hi, I am trying to interface a pressure sensor with 4-20 mA output with an ADC. So I have to convert this current to voltage. But the problem is that I have a single supply of 5V and I want to use LM358 single supply OP-AMP for this conversion. I successfully implemented the circuit using dual supply(+5V and -5V) in inverting amplifier mode, but I was unable to implement using single supply(+5V). Please suggest how to implement the same circuit in non-inverting mode, so that I can convert this 4-20 mA to +ve voltage.

A typical 4-20 mA current loop configuration uses a positive supply of 15 - 30 V and a ground referenced shunt. Manga Maker Comipo here. Self powered 4-20 mA outputs are often ground referenced. But its's not the preferred way to pass the full loop current through the input amplifier. Many PLCs are simply using a 250 or 500 ohm shunt as passive I-V converter and no amplifier at all.

Alternatively you can use a lower resistance value (e.g. 50 ohm) to reduce shunt power dissipation and achieve better loop supply voltage margin. Then a single supply non-inverting amplifier can scale the shunt voltage to the intended range and optionally apply an offset to get zero output at 4 mA. P.S.: I see, that your latest post is going the same way. All circuit variants are basically correct. Amber Lee Swimsuit Edition.