I am using a LTC6655-2.5 along with a LTC2383-16. The capacitor I'm using is a 47 uF 6.3 V X5R. As suggested in the ADC datasheet I originally used the 1 ohm resistor. When I noted the oscillation I didn't have a good guess and shorted the resistor. I also tried smaller capacitors. The oscillation frequency is on the order of 1Vp and 700 KHz. It will be stable for some time then enter oscillation. I'm not certain if it's the voltage reference or ADC that is oscillating....or if it really makes sense to say since when connected they system oscillates.
I've done some searches of oscillation problems with these components and haven't come up with much. As another guess I replaced all the components one at a time but the problem remains. As these are MSOP components it isn't easy to debug on the PCB I made.
Suggestions?
I've done some searches of oscillation problems with these components and haven't come up with much. As another guess I replaced all the components one at a time but the problem remains. As these are MSOP components it isn't easy to debug on the PCB I made.
Suggestions?