nRF52832 32 MHz Crystal Aging – Epson FA-128

[Ron]

Hi

I use Epson FA-128 (Q22FA12800025) based on Nordic’s recommendation, but I’m struggling to compare alternatives because the datasheet lists two aging rates:

±1 ppm/year for RF reference

±5 ppm/year for clock applications

Does Nordic assume the 1 ppm RF spec, or is aging expected to be higher? I am not sure how can the application effect the ppm like that.

I’m considering a ±3 ppm/year alternative—will this have a significant effect on meeting BLE accuracy requirements over the product’s lifetime?

Thanks!

[Simonr]

Hi

To be on the safe side you should always assume the worst numbers from the spec. but you can always contact the vendor to get an "official" statement on it I think. If not, the safe play would be to assume the 5ppm aging.

Best regards,

Simon