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RC oscillator (AD5700-1 only)

Question asked by Greg@6344488 on Jan 6, 2015
Latest reply on Jan 7, 2015 by KenK

Does the Internal RC oscillator (AD5700-1 only) meet the HART specification over the extended temperature range of -40° to +125°C?

The AD5700-1 specifies a +/-1% internal oscillator for the temperature range -40° to +125°C. Per the factory, the part also has a typical drift at 1000 hrs of 0.3%, with most of the drift occurring between 0 and 500 hours. I am new to HART, but it is my understanding that the carrier modulation is held to +/-1% by HART specification. Doe this imply that the drift associated with the internal RC will be a problem long term?