chopper amplifier phase (margin?)

[CopperCone]

I was looking at the LTC1150 and it just says gain/phase on a graph.

Do they mean phase margin? I.e. only valid for open loop applications?

If I understand, the phase margin is usually not relevant, as  phase inversion usually is designed to occur past the 0dB gain point, and it will oscillate there, but it may be involved sooner if a heavy capacitor is used..
http://cds.linear.com/docs/en/datasheet/1150fb.pdf

and that means that the phase will be inverted or equal depending on the type of feedback used (inverting or non inverting).

Not too familiar with chopper amplifiers though, thought I would check.

[mikerj]

That's the open loop gain and phase with 100pF load on the output.

[David Hess]

Not too familiar with chopper amplifiers though, thought I would check.

Technically it is not a chopper amplifier; it is a chopper stabilized amplifier which is a very different thing.  In all respects, it may be treated as a linear operational amplifier with some special characteristics.

The gain and phase graph represents the same thing as it would on a normal operational amplifier.