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Best way to interface an offset signal

Jon Bean1
Expert 1130 points
Other Parts Discussed in Thread: ADS8326

I have a signal from a sensor of 250kHz and varies between 4.5V and 1.25V. I want to interface it to a 16-bit ADC with a 2.5V reference. What would be the best way to do this?

Thanks

  • 0
    TI__Guru**** 181981 points
    Hi Jon,

    We have a number of 16-bit converters that have a differential input with a +/-Vref input range. You can use a static 2.5V reference on the IN(-) terminal and then apply your 1.25 to 4.5V signal to the IN(+) terminal and go from there. Figure 28 in the ADS8326 illustrates this. Do you have a particular sample rate that you want to capture data at? How many channels do you need?