According to the datasheet, long term stability of MAX 6165 is 80 ppm/1000Hrs. Is that non-cumulative? Datasheets for equivalent products normally state that the long term stability spec is non-cumulative.
There is a long-term drift plot on the datasheet which suggests it is non-cumulative, but that plot can only be for one-off product so it is insufficient to draw conclusions.
This is a very important specification for us. Thanks very much.