4 Replies Latest reply on Nov 14, 2017 12:43 AM by user_49271930

    ¿how to design an ultrasonic signal acquisition with SAR ADC?

    JhesusLegarda

      Hi, my signal is 54 KHz ultrasonic signal from transducer, based on Nyquist theorem I need two times the transducer central frequency but I need more than this for my project, between 8 and 10 times the central frequency, from the ADC SAR datasheet I have read that I need to place an external capacitor,the voltage levels  of the ultrasonic signal are in the scale of milivolts ( 250 mV P-P), but actually I don´t know if the signal must be placed like an external terminal in analog pin or like a variable voltage source.   Thank you very much for the answers, I'm new with the Psoc devices and want to learn a lot from you.