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TDC1000: TDC1000

Madeleine Collins
Prodigy 195 points
Part Number: TDC1000

Hello,

I'm currently using the TDC1000 as the driving chip for an ultrasonic transducer driver.
I can attach a schematic and scope screenshots if needed.
The current problem is that there is a "TRIGGER" and "START" signal, but not a "STOP" signal. so the TOF cannot be calculated.

Thank you,

  • 0
    TI__Genius 11015 points
    Madeleine,

    Please send me the input conditions of our setup. I will need to verify your settings for this issue. Also let me know the distance/medium & transducer frequency of our setup.
  • 0 in reply to Bharat Aravamudhan
    Prodigy 195 points

    Hi Bharat, I've attached the schematic for the circuit. It is driven by the STM32F469IGH6 microcontroller. 

    The sensor body is 50mm and the medium is air. The frequency of the clock is 1MHz. 

    I've also attached screenshots of the CLKIN, TRIGGER, START, and Tx signal 

    CLKIN: 

    START:

    Tx: 

    TRIGGER:

  • 0
    TI__Genius 11015 points
    Madeleine,

    Please use ultrasonic frequency transducers of lesser frequencies for measuring TOF through air. Use Freq in the ranges 50Khz to 600Khz.

    Also make sure the transducer is firmly attached and rightly oriented such that it can receive the Rx signals.