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TDC1000 - several questions

Hirotaka Matsumoto
Guru 27585 points
Other Parts Discussed in Thread: TDC1000

Hi all

Would you mind if we ask TDC1000?

<Question1>
What is the Blanking function used for?
To save the power?

<Question2>
What is the difference between Standard and Short TOF?

<Question3>
When the transmission starts, it occurs the noise.
Does TDC1000 have the way to prevent from occurring the noise?

Kind regards,

Hirotaka Matsumoto

  • 0
    TI__Mastermind 21685 points
    1. After the TX excitation pulses, blanking is used to decide when TDC1000 starts to look for echo in its RX channel. See section 8.4.6 of the TDC1000 DS. Only after this period, the mux is switched to the correct RX path. This helps prevent TX burst from being amplified in the RX path.

    2. In short TOF, TX excitation pulses are sent only after the VCOM is settled and autozero period is done. It's useful for measuring TOF < 30us. Standard is for TOF > 30us.

    3. As explained in (1), the mux is switched to the correct rx path only after blanking period to help in this.

    Thanks,
    Vishy