Is this data available? The data sheet gives only typical value (35ppm/°C, theoretical "guaranteed by design") but no maximum. Any idea of how much would be this maximum? I am working with the 20K version.
Thanks in advance
The max TC can be estimated as twice of the typical specification which would be around 70ppm/degC.
Also take note that when using rheostat mode, the TC is not constant across all codes. See figure 24 on the data sheet for reference.
We don't have enough data to support a maximum limit for the resistance temperature coefficient. This is the reason why we only give out a typical specification for this parameter.
Have you experienced anything odd with the temperature coefficient of the AD5293?
The problem is I am using it to ballance a differential amplifier. I have to use it as rheostat in that position thus knowing the TC is relevant for worst case analysis. Before you ask, no, I cannot use it in divisor mode in my design.
Relying on typical data for such an analysis is not exactly good engineering so I would like to avoid it if I can. Could you provide at least a reasonable ballpark for that figure? E.g.2x typical, 10x etc.?
No clue whatsoever?
We're trying to get information from the designer if we can provide an estimate. I'll keep you posted.
Rainer, thank you very much.
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