HI,
In OPA211 datasheet, the figure11 show the gain and phase vs frequency. But, the phase is from 0-180dgee. I'm not sure if this is phase margin or phase? Gerneral, the phase response should be 0- -180. Could you advice why we show this in OPA211 datasheet?
Haroad,
The phase shift should be from 0 to 180 degrees but phase margin from 180 to 0 degree (as you increase the frequency). One easy way to know which graph you look at is to 'extrapolate' the phase to DC (or low frequency) - if it show 0 degree then it is phase shift but if it show 180 degrees, as in the case of OPA211 PDS, then it is a phase margin. To convert between the two: phase margin=180-phase shift
