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ADS127* output Settling time

Matias Brusco
Prodigy 20 points
Other Parts Discussed in Thread: ADS1278

ADS1278, Settling Time. The datasheet specifies Settling time for 3 modes: High Speed, Low Power and High Resolution, but it does not even mention "Low Speed" Mode setling time. Could you please provide this information ? Thanks

  • 0
    TI__Mastermind 23235 points
    Hello Matias -
    The settling times for the different modes are shown in the spec table on page 4 (Under 'AC performance', just above 'Voltage Reference Inputs'). The Low Speed mode was inadvertently left out of the text in the apps section (as you noted).
  • 0 in reply to Greg Hupp
    Prodigy 20 points

    Thanks Greg, yes, I did find it there.

    Just to make sure I understand the definition of "Settling time":  this would be the time it takes to settle after an input step,right ? Does it depend on the step amplitude?

    For instance: Clock at 1MHz, Low Speed Mode, that gives me a fDATA of 390.625Hz (1Mhz/2560). Input: step from 0V to 5V, will it take 194.56 msec to settle in Low Speed Mode (76/390.625) ? What if the step is 0.5V ?

    Thanks again

    Matias Brusco