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ADS1114: Double buffer of converion register

Charles Perry33
Prodigy 10 points
Part Number: ADS1114

Should the reading of the conversion register be synchronized to the transition of the Data ready line to avoid being updated during a read operation when set to continuous conversions?

  • 0
    TI__Guru* 92655 points

    Charles,

    It’s not absolutely necessary to check the data ready line when reading the conversion. When the I2C read data has been decoded, the conversion data is moved to an I2C SDA output buffer so the output data read isn’t interrupted by a new conversion completion.

    If you are using the device with a multiplexer or are changing configurations, it’s still very useful to know when the conversion completes so that the data can be read and the configuration is updated. If you need to make similar changes, we often recommend using the single-shot conversion mode instead.

    For many of our SPI devices, a new conversion could potentially interrupt a read, so this is certainly more important for those devices.

    Joseph Wu