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HDC1080: Cause of Humidity data error

Part Number: HDC1080

 Hello guys,

One of our customers is evaluating HDC1080 on their own board. In the evaluation, they found the HDC1080 humidity data had +10% error. They checked the surface of the sensor and found some particles on it then. They think it is one of cause of the humidity data error. But they want to know whether there is any other reason or not.

So could you please tell me what is reason of the humidity data error except the particles?

Your reply would be appreciated.

Best regards,

Kazuya Nakai.