This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: BQ32000
'Cause we're requested to have +/1ppm accuracy of RTC by customer.
And the minimum tolerance of 32.768KHz crystal is +/-5ppm.
We'd like to confirm the 'Calibration' function on BQ32000.
There're options to select in the register.
If we select -4ppm, does that mean original +/-5ppm will be calibrated to +1ppm, -9ppm? Or both calibrated to 1ppm?
Please help to clarify our confusions.
Thanks in advance.
Q:If we select -4ppm, does that mean original +/-5ppm will be calibrated to +1ppm, -9ppm? Or both calibrated to 1ppm?
A: The +/- 5ppm accuracy specified in the XTAL datasheet means that the accuracy of the XTAL will be 32.768kHz XTAL will be guaranteed between 32.768kHz - 5ppm and 32.768kHz +5ppm. Therefore, if you select -4ppm for an XTAL with +/-5ppm range, the range is now +1ppm to -9ppm. Note that the calibration effect is only observed every eight to sixteen minutes
More information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html
Learn more about clocking fundamentals by watching the TI Precision Labs: https://training.ti.com/ti-precision-labs-clocks-and-timing
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Lane Boyd:
Thank you for your reply.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.