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Original question:

TDC1000-TDC7200EVM: TDC1000-TDC7200EVM Flowmeter Setup

TDC1000-TDC7200EVM: TDC1000-TDC7200EVM

parthiban Elavarasan
Prodigy 40 points

Part Number: TDC1000-TDC7200EVM

Hello,

I have been working in TDC1000-TDC7200EVM for flowmeter setup. I need help in debugging it. I have interfaced 4Mhz transducer and my TOF is always displaying as 0. I have seen in other post that i should employ 1Mhz transducer but i would like to use 4Mhz transducer. Please let me know what needs to be changed in the schematics.

  • 0
    TI__Genius 11015 points
    Parthiban,

    As you see in the functional block diagram in page 12 in the TDC1000 datasheet, we have an internal LNA & PGA in order to help in amplifying the Rx signal & send that to COMPIN. This gain components R34, C27, C32 & C36 are configured for a resonant frequency of 1Mhz (acts like a filter), you will need to change these components in order to change it suitable for a 4 MHz transducer.