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Original question:

TDC1000: TDC1000 temperature compensation

TDC1000: TDC1000 temperature compensation

user1268714
Prodigy 30 points
Part Number: TDC1000

Hello,

is it necessary and possible to compensate the electronical drift of the TDC1000 and it's amplifiers (LNA, PGA) and the analog filter parts over temperature?

Can I Bypass the TX Signal some way to the RX for measuring the Zero time?

Thanks a lot for reply! 

  • 0
    TI__Genius 11015 points
    Hello,

    Please let me know if the device will be heated up in your system & you would like to check its temperature drifts.

    Also let me know why you would like to bypass the TX signal ?
  • 0 in reply to Bharat Aravamudhan
    Prodigy 30 points

    Hello Bharat,

    my ultrasound TOF electronics will be used in environmental temperatures between -10 and 80 °C. In Addition i'm using a TX amplifier to excite the piezo with 15V. Therefor, to get stable TOF values, it is necessary to compensate the temperature drift of the whole TX-RX chain. This could be easily done, if i it is possible to feedaback the TX Signal directly into the RX path and measure the Zero TOF.

    What is the temperature drift in pico seconds of the TDC1000 itself over themperature? There are no Infos in the datasheet!

  • 0 in reply to user1268714
    TI__Genius 11015 points
    Hello,

    We do not have the data on the temp drift in ps for TDC1000 over temp. Please note that the speed of sound/light will vary in mediums based on temperature.
    The device TDC1000 in itself should not have any significant spec degrading in the temp range of -10 to 80C since it is rated for -40c to 125C.