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Design >> Mixed-Technology Design >> What is the best accuracy that a TCXO can achieve?
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Message started by ywguo on Jul 30^th, 2009, 7:57pm

Title: What is the best accuracy that a TCXO can achieve?
Post by ywguo on Jul 30^th, 2009, 7:57pm

Hi,

I guess it depends heavily on the frequency stability over operating temperature range of crystals. But I don't know what's the extreme that the crystal industry can approach. Any literature, datasheet, website are appreciated.

Yawei

Title: Re: What is the best accuracy that a TCXO can achieve?
Post by Kevin Aylward on Jul 14^th, 2013, 1:13am

The best SOA for a TCXO is going to be around 0.05 ppm over -40 Deg to 85 Deg to 0.1ppm. Most achieve a bit worse, e.g. 0.5 ppm. XTALS un-compensated are around 20 ppm to 100 ppm. XTAL temperature hysteresis is a killer. OCXO (oven) gets you to the ppb level, in part, because the xtal is not allowed to move, much.