Hi
Just held an internal review. They had placed resistors on the inputs of the op-amps to increase the immunity to radiated fields (problem at
200MHz)Commonly 10k is used and the input capacitance of say 0.2pF gives a cutoff freq of 80MHz. Is this the reason or is it the protection diodes that draw less current and thereby avoiding SCR problem with the die? Another reason?
I have never seen this before - have anyone of you guys?
I would rarther have placed a cap close to the input to ground. A
100pF ceramic would work all the way up to 1GHz.Regards
Klaus