Dear members,
I'm designing a low-pass filter with FilterPro for a photomultiplier tube application. I was planning to design a butterworth filter as an anti-alisaing filter used in front of an high-speed ADC.
I have seen that the question about the Min GBW is already asked on the forum. (http://e2e.ti.com/support/amplifiers/etc_amplifiers__other_linear/f/18/t/164098.aspx).
The fact is that we need a filter with a cutoff frequency of 5MHz with a gain of 1 and the supply voltage is 1.8V. It means that the min GBW required is higher than 200MHz... Amplifiers with the highest BW are LMV793 or LMP7717 (88MHz). Is it an acceptable compromise or will we have to reconsider our board design?
Thanks a lot in advance!