> Alessandro Agostini said: > ". . .Sometimes in fact the op. amps. connected to the output appeared > to be damaged [by production line ESD tests] but only after some days."
I strongly recommend thorough ESD testing of designs and design changes. I would never purposely apply ESD to a customer product. ESD is insidious. Some years ago in another life we suspected ESD damage to components during product assembly, and went to great lengths to eliminate the possibility. Later we found a significant decrease in warranty costs; we were having failures SIX MONTHS into product life from manufacturing ESD, and didn+t know it!
