Shunt Amplifier with Offset Output

By reducing the +12V common- mode voltage, an INA122 can sense the voltage drop across a shunt resistor while being powered by the same +12V power supply.  Rg controls the voltage gain of U1. This circuit is scaled for a 2.5V output range centered around +1.25V; thus this amplifier can measure bidirectional shunt current. An INA122 does not feature a R-R output so the sinking current is limited to about -0.3A. This can be useful where battery current must be monitored while it is being charged or discharged. Bypass capacitors are not shown. (Circuit is created by Tucson)

Shunt Amplifier with Offset Output circuit:

 Shunt amplifier with offset output

Online Simulation of a Shunt Amplifier with Offset Output Circuit:

The great feature of the TINA circuit simulator that you can analyze this circuit immediately with TINACloud the online version of TINA. Of course you can also run this circuit in the off-line version of TINA.

Click here to invoke TINACloud and analyze the circuit yourself or watch our tutorial video!

You can send this link to any TINACloud customers and they can immediatelly load it by a single click and then run using TINACloud.

Michael Koltai

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