Achieving a high common mode voltage differential amplifier requires a very high attenuation resistor network. To minimize op amp input offset voltage and drift errors, an autozero type is used– OPA735. An OPA335 can be used on a 5V supply. Common- mode rejection is critically dependent on the ratio matching of R3:R2 & R4:R1. These should be matched to extremely tight tolerances. Power dissipation in R3 & R4 are significant. Bypass capacitors are not shown. (Circuit is created by Neil P. Albaugh TI – Tucson)
High Common-Mode Voltage Difference Amplifier circuit:
Creation and Simulation of a 1 kV High Common-Mode Voltage Difference Amplifier circuit
Also if you download the FREE trial demo of TINA Design Suite you can not only find and run this circuit but you will also get
- An immediate 20% discount from the offline version of TINA Design Suite
- Free license for your second computer, laptop etc.
- One year free access to TINACloud (the cloud-based, multi-language, installation-free online version of TINA now running in your browser anywhere in the world)
Click here to download the FREE trial demo of TINA Design Suite