On Fri, May 1, 2020 7:07 pm, [email protected] wrote: > A friend suggested looking into some MEMS TCXO's made by SiTime to > do this with. SiTime offers a wide variety of Stratum-3 TCXO chips. > One of them is the SiT5358 which is spec'd at 0.05 ppm from 1 to 60 MHz.
They also have a small OCXO which is basically one of the TCXO devices in a small oven: https://www.sitime.com/products/programmable-ocxos > I am wondering what any feedback thoughts might be on this from > the Time-Nuts gang? They seem to be relatively decent TCXO devices, but they are programmable, i.e. they use a fractional PLL type technique, so close offset phase noise is not great compared to a traditional quartz device. The small size makes the temperature compensation really fast, and the low mass makes the devices relatively low acceleration sensitive. SiTime has some graphs showing frequency change when a fan is turned on and off blowing across the device, and frequency change under various acceleration conditions. I am not sure of the cost of the devices. If you are not cramped for space and power in your test equipment use case you should see how the cost compares to a traditional low cost quartz OCXO (or maybe even TCXO if the accuracy meets your needs in your lab environment, i.e. I don't expect your lab will vary much more than 10C to 30C even if you were to leave the house for a couple of weeks). -- Chris Caudle _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
