can the AD790 Comparator Logic Supply Pin be powerd with 3.3V, to Interface directly with LVTTL or LVCMOS33 ?
I may be a little late chiming in here, but I agree that a high quality comparator like the AD790 needs to be available with 3.3V logic support. I checked the AD8468/ADCMP608 data sheets, and they do not support the analog +/-15V range as the 790 does.
I note that ITCSteve did some testing at 3.3V and below, which is encouraging, but I am very hesitant to take the risk of designing this into a client's product......severe liability issues if the performance varies between lots, etc etc. AD SUPPORT FOLKS: PLEASE, PLEASE upgrade the 790 to handle +3.3V logic, document it as supporting 3.3V if it consistently works, or consider a new product.
This comparator beats all the others out there, but 3.3V logic for CPLDs and CPUs is simply too ubiquitous nowadays to restrict operation to 5V.