Questions about LTC2327-16 spec

Question

Hi Sir/Madam, 
 
 Our design team have a chance to use LTC2327-16 in our design. 
 But we find something wrong in the data sheet, and would like to confirm some specs. 
 1. I believe the graph below is wrong. Based on this graph, the FS error drift should be around 2ppm/C, which mismatch the spec in converter characters. Please clarify.

2. For all specs in page 3, are they tested when the ADC using internal reference? If so, these specs have included the effect of internal reference error and drift, right? 
 3. Can you provide some specs about power rejection or power sensitivity for this ADC?

ADIApproved · Accepted Answer

1.The curve is for a typical part. The spec is for a worst case part which can be much worse than a typical part. 
 2.If a REFIN or REFBUF is specified or Note9 is present an external reference is used. 
 3. There is no PSRR information available. Use recommended bypassing and a low noise regulator to power the ADC and data sheet performance should be achieved.)

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Questions about LTC2327-16 spec