It made a comparator with ad8009 element. Configured as follows
The signal fell to negative and held the reference to negative volts.
We would like to :
Amplitude : 0V~-3V
Rising frequency : 50Mhz
We use ad8009 as a delay in addition to a comparator. (In the entire circuit)
However, many offsets occur. (over 3.8V / I judge that the amp is over stress)
We decided it was because we were using a lot of amp. So we've only tried one channel.
And the logic coming down is too long.(Falling time about 10ms )
We are planning to use a low current supply of ad8011 instead of ad8009.
Here's the question. Using a lot of amp to supply a lot of current can lead to a lot of offset to the output? I wonder why. All the voltage is parallel.
The second question. Can we solve the problem of noise or falling time by replacing ad8009 with ad8011? This question is linked to a SiPM . question that I have previously done.
Or, if you can't use the above amplifier as a comparator, can you recommend it? We can not use the comparator IC because the system above is already made of PCB.