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PGA460: How to set up PGA460 to shorten SAT_TH time duration

Stanley Dai
Expert 5810 points
Part Number: PGA460

Hi team,

Customers want to use two transducers to reduce the blind area. They want to know set up PGA460 to shorten the duration time of SAT_TH for measuring distance less than 5cm.

Best Regards,

Stanley Dai.

  • 0
    TI__Mastermind 27950 points

    Stanley,

    Diagnostic features such as decay diagnostic, frequency diagnostic, and voltage diagnostic are only intended to work in a mono-static (single) transducer configuration. The voltage diagnostic will not work at all in bi-static (dual) transducer mode, and the decay and frequency will only be partially reliable.

    In general to minimize the SAT_TH (decay diagnostic) time, set SAT_TH to the maximum available value of 15. The SAT_TH is a decimal value, so in the case of a value of 15, as long as the receiver value in digital (8-bit) is above 15 out of 255, the front end will be considered saturated.