Now I consider the 16MHz (2x1.6mm) Crystal the ESR about 200 ~ 300ohm. Because, it's difficult to find the crystal under 100ohm.
For example, the mouser's all 16MHz 1206 crystals have over 200ohm. There is nothing under 100ohm esr.
The requirement for 16MHz X-tal's ESR lower than 100ohm is so critical ?
I read the requirements for x-tal's esr from the http://support.dialog-semiconductor.com/resource/b-018-da14580-checklist...
The larger esr results the longer start-up time. If the esr is 300ohm may be the start-up time ~10msec.
The start-up time 10msec makes the DA14580 not working? i.e DA14580 can not boot or shows malfunctioning operation?
What about the requirement's for 16MHz X-tal's frequency tolerance? 100ppm frequency tolerance is suitable?
Please guide the mandatory and critical specifications for 16MHz crystal can be used with DA14580 safely and without preparation frequecny trimmming during the mass production process.