Inverting Gain Amplifier

The circuit below shows an inverting gain amplifier using a MCP6XXX op amp. It represents an impedance of R1 to the sensor (Vsen) and produces a negative gain from Vsen to Vout.

inverting-amp.png

Advantages:

  • Resistive isolation from the source
  • Large input voltage range is possible
  • Virtually no input stage distortion
  • Simplicity

Disadvantages:

  • Resistive loading of the source
  • Inverting gain
  • Amplifies Common mode noise

Sensor Examples:

  • Thermo pile
  • High-side (Vdd) voltage sensor
​

  Return to Top

© 2024 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.