ADS1248

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ADS1248 [Copy link]

I need help from experienced experts. I use ADS1248 and platinum resistance to measure temperature. The value read from ADS1248 changes a lot every time I power on. The real temperature is about 23 degrees, but the temperature converted from the data read from ADS1248 is 23.8 at the beginning, then changes to more than ten degrees, then rises to more than thirty degrees, and finally slowly changes to the actual value (the room temperature does not change much, so the analysis is that the data read from ADS1248 is unstable). The whole process takes at least five minutes. I have adjusted the SPI rate and it has improved a little. What other possible reasons may there be?

joneywei

Posting schematics is useless.

灞波儿奔

How to analyze why the data read from ADS1248 is unstable?

qwqwqw2088

I don't know if it's the algorithm problem because I adjusted the SPI rate and it improved a little

alan000345

Yes, it is really difficult to solve the problem without a schematic diagram.