AnsweredAssumed Answered

NHS3100 RTC

Question asked by Fantasy Fan Employee on Nov 28, 2018
Latest reply on Nov 29, 2018 by Kan_Li

My customer used NHS3100 internal RTC with 32kHz FRO clock. There's considerable deviation for the RTC.

 

At room temperature, the deviation is less than 10s per two days;

If placed two boards in the fridge, where the ambient temp is about -10~-20℃, the deviation between the two boards is about 20min per day. While with sw calibration, the deviation could be reduced to several minutes. 

 

Customer questions are:

1. Do we have the accuracy characteristic of the internal 32kHz FRO clock/ RTC?

2. Do we have ANs or suggestions to improve the RTC accuracy of wide circumstance temp range?

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