I had a board made a while ago but have only just gotten around to putting components on it and testing. It doesn't work. Given how simple it is i'm thinking it will be obvious to the reader what is wrong, i hope so anyway. It is an amplifier circuit for the opa549 with bypass caps and just the 2 resistors, i think there is some kind of problem with earthing. I've attached the schematic of the power board i'm using and the eagle board and schematic, i couldn't find a footprint for the exact opa549 so i used a similar package, so the schematic may not be exactly what you were expecting. The traces are on the bottom layer not the top as it appears. I'm getting -50V on pins 5&7 and nothing on pins 10&11.
Any idea?
Any idea?