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TMP464: do we have any restrict on the on die diode process?

Kelly Bai
Intellectual 1330 points
Part Number: TMP464

hi team,

for TMP464 remote sense function, do we have any restriction on the SOC on die diode process? such as it should be 10nm or higher?

thanks.

  • 0
    TI__Mastermind 35825 points

    Hi Kelly,

    We have tested on-die junctions built on small geometry processes for our customers. I haven't encountered one that is not viable as a temperature sensor; there is simply reduced accuracy. Some of this inaccuracy can be improved by the Beta Compensation feature of TMP43x and TMP44x devices. All junctions will benefit from N-Factor calibration, which is supported by TMP464. After the sensor is optimized, there will still be error due to junction-to-junction variation. This junction error will have a +/- magnitude that is cumulative with the TMP464's +/- 0.75C specification. 

    The only junctions I've observed that are not compatible were built on high-power processes for amplifiers and RF. These junctions had too much capacitance. Excessive capacitance always causes a negative error, as seen in TMP464 datasheet. The error due to capacitance becomes unreasonable quickly above a couple nF.

    thanks,

    ren