Transimpedance Amplifier Cutoff Frequency | Cypress Semiconductor
Transimpedance Amplifier Cutoff Frequency
I was curious as to how the -3 dB Frequency was calculated for the transimpedance amplifier. The Data sheet says that this is calculated based on
f -3dB = 1/ (2*pi* Rfb* Cfb)
Which is not actually the case for the autocalculated value in the TIA configuration menu.
for example, with:
Rfb = 20k
Cfb = 4.6 pF,
the cutoff frequency should be about 1 729 945.03 Hz ? but the autocalculated value is 866 kHz...
perhaps someone can shed some light on this?