Op Amp Gain Bandwidth Product

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Gain Bandwidth Product (GBP) gives a measure of the performance of an Op Amp at higher frequencies.

A typical GBP value might be 1 MHz or 1000000 Hz.

This means that at 1 MHz, the amplifier gain has dropped to 1.

At any frequency you are interested in, the gain can be calculated from

Gain = GBP / Frequency.

So at 500 Hz, the gain is

Gain = GBP / frequency = 1000000 / 500 = 2000

At the upper limit of human hearing (20 000 Hz) the gain is

This means that you need to limit the gain to 50 or less over the audible frequency range to get a flat response or equal gain.

Gain = GBP / frequency = 1000000 / 20000 = 50