This site will be unavailable on Friday 21 February from 11:00AM to 5:00PM MST (1800 to 2400 UTC) for system maintenance.
Difference Amplifier
Last modified by Microchip on 2023/11/09 09:03
The circuit below shows a difference amplifier using an op-amp. It presents an impedance of R1 to each end of the sensor (VSEN+ - VSEN-). The gain transfer function of the difference amplifier is also shown in the figure.
Advantages
Resistive isolation from the source
Large input voltage range is possible
Reject common mode noise; it's good for remote sensors
If you need to work with Microchip Support staff directly, you can submit a technical support case. Keep in mind that many questions can be answered through our self-help resources, so this may not be your speediest option.