LTC6268-10 propagation delay time

Hi engineers:

I use the LTC6268-10 as Photomultiplier Tube Post-Amplifier.The scheme as follows.

Example waveform from LTC6268-10 datasheet.

What is the delay between input and output?I test it about 10ns,is it right?Is there a nominal value?Thank you!

Additional the LTC6268-10's bandwidth is't enough for my apply.This is my PMT datasheet.

H10720_H10721_TPMO1062E-PMT.pdf

My laser drive are :the rise time is 5ns,the pulse width is 10ns.I want to use 20k transimpedance or larger,can you give me some advice about what amplifiers I can select?Thank you very much.

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  • 0
    •  Analog Employees 
    on Jan 15, 2019 6:22 PM

    Hi:   Actually, the H10720 was the PMT featured in my article on the LTC6268... which you can find here:

    LT Journal V25N2 LTC6268 Brisebois

    I did not measure the delay, as this is usually dominated by the total of the distance of the laser, the PMT, and the cabling.   Output pulse half-width was about 2.2ns.  So I think the LTC6268-10 should be fast enough for your 10ns pulse.  With a PMT, you should not need 20k Ohms of gain.

    I still have some boards left over from that project, if you want one.

Reply
  • 0
    •  Analog Employees 
    on Jan 15, 2019 6:22 PM

    Hi:   Actually, the H10720 was the PMT featured in my article on the LTC6268... which you can find here:

    LT Journal V25N2 LTC6268 Brisebois

    I did not measure the delay, as this is usually dominated by the total of the distance of the laser, the PMT, and the cabling.   Output pulse half-width was about 2.2ns.  So I think the LTC6268-10 should be fast enough for your 10ns pulse.  With a PMT, you should not need 20k Ohms of gain.

    I still have some boards left over from that project, if you want one.

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