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TMP431: using for the internal thermal diode with 14nm process

Go
Genius 4220 points
Part Number: TMP431

Hi,

Does anyone have the experience that used TMP431 for measuring temperature of the internal thermal diode with 14nm process?

Can we use TMP431 for the purpose?    or is there any better part for 14nm process? 

Thanks,

Go

  • 0
    TI__Mastermind 43935 points
    Hi Go,

    TMP43x and TMP44x families are the TI products which are designed to address issues with small geometry processes. They both employ the same Beta Compensation technology, so the performance is the same.

    Temperature measurement of a BJT relies on collector current and therefore Beta of the transistor. See en.wikipedia.org/.../Silicon_bandgap_temperature_sensor and en.wikipedia.org/.../Bipolar_junction_transistor

    The BJTs built on processes with geometry 45nm and below tend to have a Beta < 1. A typical discrete BJT has a Beta equal to 100. When Beta is less than 1, most of the current injected by the TMP4xx device comes out of the base instead of the collector. Our Beta Compensation circuitry automatically adjusts the current to correct for this behavior and restore accuracy to the temperature measurement. The Beta Compensation feature can compensate for a Beta as low as 0.1.

    Thanks,
    Ren