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Unity gain buffer

David Graham
Prodigy 250 points
Other Parts Discussed in Thread: BUF602

I am looking for a unity gain buffer that can accurately track 0V-5V rise/fall times of ~3ns and would appreciate any recommendations.

Thank you,

David Graham

d-graham1@ti.com

  • 0
    TI__Genius 13935 points

    Hello David,

    Do you have a sigle ended signal?  What kind of load are you driving?  

    5V in 3ns is around 1,600 V/us slew rate and you would need a part with an 8V or higher supply.  The BUF602 looks like it would meet your requirements.

     

    I would recommend a supply configuration of -2V and +8V. 

    Do you need a fixed gain part?  Several of our current feedback amplifiers could also be set up for a gain of 1. 

    Regards,

    Loren

  • 0 in reply to Loren Siebert 1
    TI__Prodigy 250 points
    Loren,

    First, many thanks for your response.

    Here is some additional information in response to your comments/questions:
    1. Signal is single ended.
    2. The load will ATE interface to tester resource comprising of a transmission line, a few relays, pogo interface, and tester resource is ‘AC terminated, 50ohms to Vterm’.
    3. I would prefer a gain of 1 since device output is up to 5V and tester resource is limited to max of +7V.

    Yes the BUF602 looks like a good solution, one potential concern was the low input impedance of 2kohm or perhaps this is not a concern if AC coupled? The outputs of my device under test are spec'd with output load of only +/-1mA.

    I appreciate your thoughts based on this additional feedback.

    Again, thank you for your inputs.
    David Graham