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What is the ΔΣ modulator frequency for the ADS1118?

Jason Work
Genius 10830 points
Other Parts Discussed in Thread: ADS1118, ADS1018, ADS1120

What is the ΔΣ modulator frequency for the ADS1118?

What is the ΔΣ modulator frequency for the ADS1018?

  • 0
    TI__Mastermind 23275 points

    Hi Jason,

    The modulator frequency of both ADS1018 and ADS1118 is 250kHz (as shown in Fig.40) and is independent of the output data rate. Please note that the oscillator frequency, from which the modulator frequency is derived, in this device is not trimmed. It can easily vary by a few percent. Thus the modulator frequency and output data rate will vary by the same amount.

    I would also take the ADS1120 into account if they need higher input impedance when using a voltage divider to measure the +/-10 or 24V signals.

    Regards,