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REF5040: Questions about REF5040

Part Number: REF5040

Dear,

We use REF5040 in PT100 temperature detection circuit, now there some questions to be explained:

1. We find that it needs about 30 sec from turn-on to stabilization, is it normal?

2. The max value of output voltage is 4.08V by oscilloscope, the error is about 0.4%, greater than 0.1%, can you explain it?

3. We use REF5040 in PT100 temperature detection circuit, can you verify that if the schematic as follows is correct?