IC compatibility

Hi harini.m,

You could check out the AD8603. It operates on a single supply from 1.8-5V. It also has low input bias current, low offset and low noise which would be good for your application. If you require a higher bandwidth, you could check out the AD8615. It operates on a single supply from 2.7 to 5V.

You could also check the link below. It might be of help with your photodiode application.

http://www.analog.com/static/imported-files/seminars_webcasts/371366216sscsect5.PDF

I hope this helps!

Kris

Thanks a lot!!

You can use my parametric chooser at http://www.sevensoftltd.com/OpAmp.aspx to look for suitable candidates

Suitable devices are the OPA376, LMP7701 and LTC6240 as they are 3V parts that all exceed the AD8663 except in terms of current requirements.

Not mentioned in the article but key to photodiode transimpedance circuits is the issue of bandwidth and stability. I don't know what bandwidth you need, but you usually need to add a feedback capacitor for stability. This compensates for the pole inside the loop caused by the photodiod capacitance, but also reduces your bandwidth. I'm guessing the signal is modulated so that ambient (environmental) light can be rejected, so you will need enough bandwidth to work at the modulation frequency.