Gain Bandwidth Product

The Gain Bandwidth Product (GBWP) of an amplifier is the product of the amplifier open-loop gain times the frequency at any point in the frequency range where the amplifier's response is attenuating at a rate of -20dB per decade of frequency. And GBWP keeps constant where the slope is -20dB/decade. GBWP is used to estimate the bandwidth when the gain is known. The picture below demonstrates the -20dB/decade decay as well as the -3dB point.

gbwp.png
GBWPSpecs.png
​

Note:

  • The Gain Bandwidth Product (GBWP) applies to voltage feedback op-amps only. For the current feedback amplifiers, the GBWP is not constant and is less than 20dB/decade.
  • The bandwidth at the maximum output swing is called the Full Power Bandwidth (fFPBW). It is limited by the

Slew Rate (SR) for the amplifiers.

  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contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates.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.