OpenLog Artemis Crystal Accuracy/Model Number

Development Boards Artemis
1

Hi,

I’m wondering if there is any information on the timing accuracy (say in ppm) or model number of the 32.768 kHz crystal used in the OpenLog Artemis board?

I note from the datasheet, the Apollo MCU can calibrate the XTAL input to +/-1ppm but imagine that the actual accuracy of the crystals are poorer than this.

Thanks in advance,

Jonathan

2

In the forum post : viewtopic.php?f=169&t=58135 I have attached a document which includes the crystal specification for the Apollo2. I expect it is not different for the Apollo3.

3

Thanks Paul, it looks like all of those for the Apollo2 have a timing accuracy of +/-20ppm so I’ll run with that.