Post Go back to editing

DC coupling to AD9467

In my application I have a photo detector voltage that I need to sample. I need good resolution and low latency, but my input is basically DC and requires a high impedance load (no more than 10K). The AD9467 seems to be well matched for my application, but I need to design the interface circuit. Initially my thoughts are to have a unity gain OPAMP to provide the high impedance input, and use a differential buffer like the ADL5562 to DC-couple to the ADC. Any advice from folks who have done similar circuits would be greatly appreciated.

(I say the signal is basically DC, but I must measure very small fluctuations at about 200 MSPS).

Parents
  • Hello,

    Umesh is the application engineer who supports the AD9467 and I am the application engineer who supports the ADL5562.  What attracted you to selecting the ADL5562?  Is it the performance, freq, or did you see it on an evaluation board and thought it would be convenient to use?  I do not recommend you running the ADL5562 beyond its specified limits.  If the common mode doesn't line up then the it may be best to select a different op amp which fits your application better.  ADI had plenty to choose from.  If we have a better understanding of your performance specs we can help you choose the right component.

    Qui

Reply
  • Hello,

    Umesh is the application engineer who supports the AD9467 and I am the application engineer who supports the ADL5562.  What attracted you to selecting the ADL5562?  Is it the performance, freq, or did you see it on an evaluation board and thought it would be convenient to use?  I do not recommend you running the ADL5562 beyond its specified limits.  If the common mode doesn't line up then the it may be best to select a different op amp which fits your application better.  ADI had plenty to choose from.  If we have a better understanding of your performance specs we can help you choose the right component.

    Qui

Children
No Data