TMP117: TMP117 Temperature offset

Arabella Zhang

Intellectual 2870 points

Part Number: TMP117

Tool/software:

Dears，

The stability parameters of TMP117 are shown in the figure. What is the annual offset converted to 25°C?

Many thanks!

Arabella Zhang

over 1 year ago

0 Simon Rojas Avila over 1 year ago

TI__Expert 7170 points

Hi Arabella,

The long term drift spec is not linear over time since the test is performed by testing the device before and after a 1000hr stress at 150°C. However, using Arrhenius eqn you could determine how many years this stress is equivalent to at 25°C. For more info please check the following document: https://www.ti.com/lit/ml/slap177/slap177.pdf.

From page 22, you could calculate AF which comes out to be 3142hrs --> over 300 years of use at 25°C.

Best regards,

Simon Rojas

0 Arabella Zhang over 1 year ago in reply to Simon Rojas Avila

TI__Intellectual 2870 points

Is the temperature drift also calculated in this ratio? 150℃ drift of 0.03℃ for 1000 hours is equivalent to 25℃ drift of more than 300 years?

0 Simon Rojas Avila over 1 year ago in reply to Arabella Zhang

TI__Expert 7170 points

Arabella,

Temperature drift is measured, not calculated. This is done by testing the device before and after 1000hr stress at 150°C.

Correct, this is what the AF calulation yields. Even though an average application temperature of 25°C may be unrealistic depending on the end equipment.

Best regards,

Simon Rojas

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TMP117: TMP117 Temperature offset