I want to use the AD8304 to measure optical power (10dbm to -60dbm), What can I use a circuit architecture and Precautions (especially in the Low optical power).
I use the PIN diode drak current is less then 50pA.
Thank you !
Have you tried using out online Photodiode Wizard design tool?
So you mean the AD8304 can not be detected in this range (-70 to +10 dBm)?
I can only deal with the OPA circuit for this-70dBm (about Ipd = 0.1nA)?
For the optical power, I just want to detect a DC optical power to -70dBm.
How about the ADL5304 and ADL5303 for my application?
My apologies - I replied hastily, and didn't notice you were asking specifically about a log amp.
I don't have any experience with log amps, so I'll defer to someone who knows more about them.
Thank you for being interested in ADI optical log amplifiers.
Yes, AD8304 is an optical log amplifier which supports optical power detection range
from -70dBm upto +10dBm, given the used PIN photo-diode responsivity is about 1.0A/W.
AD8304 supports dual +/-5V supply rails.
ADL5303 is another optical log amplifier. It has smaller package than that of AD8304.
By using single +5V supply rail, ADL5303 supports almost the same optical power detection
range, from -70dBm uoto +10dBm, given the used PIN photo-diode responsivity is about 1.0A/W.
ADL5304 is a fast optical log amplifier. Welcome to ADI public website to get the datasheet.
The link is: ADL5304 datasheet and product info | High Speed, 200 dB Range, Logarithmic Converter | Log/Limiting Amplifiers | Analog …
If you have any application related questions, please contact ADI sales for the helps.
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