I have the ADCMP605 comparator and I want to know how to latch it to stay high for 10ns. Any ideas?
Hi Suhani,I contacted the product owner for your query. We'll keep you updated.Regards,Goz
Are there any updates?
The ADCMP605 is not suitable for that application since the latch minimum pulse width (Tpl) is already 24nSec, this is the time required before seeing the transition after a latch, there are also other parameter to consider like the Tploh/l that will still add up to the 24nsec.
If you can share more information like what supply voltage? and preferred output logic in your circuit, then I may help you find the most suitable comparator for you application. Normally if you want to have a 10nSec latch your comparator the propagation delay of the comparator that you should use should fall in psec area.
I am trying to use the comparator to trigger a TDC, which has a LVCMOS input and a minimum pulse width of 10ns. I am using 5ns wise pulses so my comparator needs to be able to see that. Although my TDC min pulse width is 10ns, its fine if stays high for longer than that. I only care about the rising edge.
I was just wondering if you were able to determine how I might use the latch for my application. I am using the comparator in a lidar application. The pulses going into the comparator are gaussian with a FWHM of around 5ns. I have no problem seeing the comparator work at this pulse width, but like I said earlier, the TDC that the comparator output is connected to needs a minimum pulse width of 10ns. If the comparator output stays high for longer than 10 ns, that is fine. What should I do in order to keep the comparator high (even permanently) after my threshold is exceeded? Attached is a diagram of my setup.
Maybe you could try a small RC network after the pulse generator on the comparator input
to stretch the pulse?
Or an RC on the output?
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