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Maxim > Design Tools, Models, and Software > Calculators

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Real-Time Clock Calculator

Deviation in PPM

Seconds/Day

Minutes/Year

Temperature dependent crystal frequency error in PPM using the formula: -0.042*(25-Op Temp)²

	Operating Temperature		Crystal Frequency Error in PPM		Error in Sec/Day		DS3231/32/34 Accuracy
	°C						± PPM

Instructions:
Enter PPM, sec/day, or min/yr and click the 'calculate' button next to your entry to calculate the other values.

This calculator converts timekeeping accuracy measurements from parts per million (PPM) to real-time accuracy described in seconds per day and minutes per year.

The calculator also determines the amount of error, in PPM, of the crystal frequency caused by the temperature response of the crystal. The equivalent error in seconds per day is also given. DS3231/32/34 TCXO with RTC accuracy is also given.