My name is charles.
I'd already used the the high speed video amp(AD811 and AD8057)and ultra low input current offset amp(AD549) respectively in my simple I-V converter circuit to get a singnal from PMT(2uA max) with Rf(100Mohm).
Although I-V converter circuit done well, signals from those amps have extra tails.
I thought that it is related to speed of amp. So I decided to change the amp has low input current offset and high bandwidth.
Now, I'm trying to order samples, AD8610, AD8651, ADA5817-1 and AD8065 for converting the current from PMT(2uA maxium) with Rf(10Mohm) to voltage.
(Not yet ordered..)
So, is it ok to use those kinds of amp(AD8610, AD8651, ADA5817-1 and AD8065) as a I-V converter without any tails?
Please let me know a tip or pice of advice about it.
P.S. The singnal frequancy from PMT is about 25MHz.
Photon come from confocal laser scanning microscope system.