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BOOSTXL-TUSS4470: HPF frequency in the EVM GUI

Tushar Bhattacharyya2
Intellectual 825 points
Part Number: BOOSTXL-TUSS4470

In the TUS4xx0 EVM GUI, what is the difference between 400a, 400b, etc in BPF_HPF_FREQ bit field?

Also, is it right that the BPF cannot be centered around 1MHz and therefore we can only use the HPF for 1MHz transducer applications?

Thanks

Tushar

  • +1
    TI__Mastermind 19640 points

    Hello Tushar,

    Thank you for the question. There is  no difference between 400a, 400b, 400c.... and unfortunately the bandpass filter cannot be centered around 1MHZ the highest value it can be centered at is 731.09kHz which can be achieved by ensuring that  BPF_BYPASS = 0X0 or BPF Enabled in the GUI. BPF_FC_TRIM_FRC = 0x1 or override in the GUI. Setting BPF_HPF_FREQ = 0x2F, 500 in GUI and setting BPF_FC_TRIM = 0x7, 731.09. I hope this answers your questions.

    Best,

    Isaac