TDC7200EVM: Why 50 ohm resistors on receiver side?

Daniel W.

Prodigy 60 points

Part Number: TDC7200EVM

Hi TI team

could you explain why you put these two 50 ohm resistors on the receiver side?

Is it not better to use parallel termination in this case?

Best regards

Daniel Weigl

over 5 years ago

0 Akeem Whitehead over 5 years ago

TI__Mastermind 27950 points

Hi Daniel,

The in-line resistance acts as part of a low-pass filter given the input capacitance is 3pF at the START and STOP pins. This is to prevent false-positives otherwise created by high-frequency transients-glitches at these pins.

0 Daniel W. over 5 years ago in reply to Akeem Whitehead

Prodigy 60 points

Oh okay, thanks for the explanation Akeem.

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TDC7200EVM: Why 50 ohm resistors on receiver side?