1
\$\begingroup\$

I am using the MAX3665 in a design. The amplifier has an IR Photodiode at the input and is failing to detect any signals. My signal generator outputs a maximum of MHz square waves and MHz sine waves.

How do I know what the operating frequency of the MAX3665 is?

\$\endgroup\$
  • \$\begingroup\$ It has a DC cancellation loop. \$\endgroup\$ – DKNguyen Oct 18 at 15:55
  • \$\begingroup\$ No link nor mention of the datasheet? \$\endgroup\$ – JYelton Oct 18 at 17:49
1
\$\begingroup\$

The small signal response starts to drop significantly after 100kHz, flat from 500kHz to 700MHz. You should be able to see signals of a 100MHz. It could be something else. I would test the transmitter with a detector that you know that works to make sure that it's not the transmitter.

enter image description here

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.