TPL5110-Q1: about Timer accuracy: 1% (typical) issue

Lawrence He

Expert 2770 points

Part Number: TPL5110-Q1
Other Parts Discussed in Thread: BQ32000, BQ32002

Hi, Support Team

do we have different temperature about timer accuracy ppm? (-40 to 85 deg), (85 to 105 deg),(105 to 125 deg)

if any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence

4 months ago

0 Noel Fung 4 months ago

TI__Guru* 86040 points

Hi Lawrence,

This is an old product, I don't have additional information other than datasheet.

0 Martin Huang 4 months ago

Prodigy 30 points

Hi, Support Team

Can you recommend an RTC that meets the following specifications: -40 to 85 degrees Celsius at +/-3 PPM, 85 to 105 degrees Celsius at +/-8 PPM, and 105 to 125 degrees Celsius at +/-50 to 80 PPM?

Thanks,

Best regards,

Martin

0 Noel Fung 4 months ago in reply to Martin Huang

TI__Guru* 86040 points

Hi Martin,

The accuracy depends on the crystal, you need to pick a crystal with the stability you need.

0 Martin Huang 4 months ago in reply to Noel Fung

Prodigy 30 points

Hi, Support Team

What frequency of TCXO is recommended for use with RTC?

Thanks,

Best regards,

Marti

0 Noel Fung 4 months ago in reply to Martin Huang

TI__Guru* 86040 points

Hi Martin,

RTC usually use 32.768kHz crystal.

0 Martin Huang 4 months ago in reply to Noel Fung

Prodigy 30 points

Hi Martin,

Can I use a 32.768kHz TCXO, or should I only use a 32.768kHz crystal

Thanks,

Best regards,

Martin

0 Noel Fung 4 months ago in reply to Martin Huang

TI__Guru* 86040 points

Hi Martin,

Our RTC, BQ32000 and BQ32002 use crystal.

In fact, 32.768kHz TCXO is not a common part, only SiTime has products but it is MEMS but not crystal based.

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TPL5110-Q1: about Timer accuracy: 1% (typical) issue