I tried to replicate all the the characterization of the PSRR in an LT3080 but I have very different result from the datasheet and simulation
Here is what the data sheet suggest
This is the circuit that I used to bias and the circuit
This is the simulated response that I got
However, this is the measurement I obtained
I show the circuit I would use for a quick LT3080 PSRR measurement in the image below. I also uploaded the LTspice file in case it is helpful but as I note on the schematic, PSRR cannot be reliably extracted from the LT3080 LTspice model. Application Note AN-159 shows how to construct a real ripple generator that is necessary for test frequencies higher than the capabilities of this circuit.
