MSPM0L2227: Does clock accuracy improve when the operating temperature range is narrow?

K.Z

Expert 2880 points

Part Number: MSPM0L2227

Tool/software:

Hi All,

When using M0 in the range of 5 to 40°C,
will the MIN and MAX values of SYSOSC accuracy improve?

We expect the accuracy at 5 to 40°C to be better than the accuracy at -40 to 85°C.

Best Regards,

Ito

5 months ago

+1 Sal Ye 5 months ago

TI__Mastermind 26535 points

Hi Ito,

K.Z said:
We expect the accuracy at 5 to 40°C to be better than the accuracy at -40 to 85°C.

Yes, it will.

Normally, the minimu value comes at -40C, the maximum value comes at 85C.

Unfortunately, we do not maintain the relationship for the accuracy vs. temperautre in Lx22x datasheet.

B.R.

Sal

0 Conor 5 months ago in reply to Sal Ye

Guru 12815 points

Hi Sal,

I am a colleague of the poster. Regarding SYSOSC accuracy on the MSPM0L series, we estimated the MAX error at intermediate temperatures using linear interpolation between the datasheet values at 25°C (0.58%) and 125°C (1.3%) as shown below:

Temperature [°C]	Interpolated Max Error [%]	Datasheet Max [%]
25	0.580	0.58
40	0.688	–
85	1.012	0.93
105	1.156	1.1
125	1.300	1.3

Would it be acceptable to use this kind of linear approximation as a temperature error model in actual system design? If TI has a more accurate model or reference data regarding SYSOSC accuracy versus temperature, we would greatly appreciate if you could share it.

This information is highly critical for our application, as the internal clock accuracy over a specific temperature range directly impacts system performance and design decisions.

Thanks,

Conor

+1 Sal Ye 5 months ago in reply to Conor

TI__Mastermind 26535 points

Hi Conor,

I think you can refer to the M0G device spec and calculate its relationship:https://www.ti.com/lit/ds/symlink/mspm0g3507.pdf

B.R.

Sal

0 K.Z 5 months ago in reply to Sal Ye

Expert 2880 points

Hi Sal,

Thank you for your cooperation.

Please check your private messages.

Best Regards,

Ito

0 Sal Ye 5 months ago in reply to K.Z

TI__Mastermind 26535 points

Hi Ito,

Sure, let us discuss offline.

B.R.

Sal

0 K.Z 5 months ago in reply to Sal Ye

Expert 2880 points

Hi Sal,

I have sent you an email.

Best Regards,

Ito

+1 Sal Ye 5 months ago in reply to K.Z

TI__Mastermind 26535 points

Hi Ito,

I received your email, and will set up internal discussion this week. Thanks for reminding.

B.R.

Sal

0 K.Z 5 months ago in reply to Sal Ye

Expert 2880 points

Hi Sal,

Thank you for your help,

Best Regards,

Ito

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MSPM0L2227: Does clock accuracy improve when the operating temperature range is narrow?