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ADS1115: Multiple devices on single I2C for simultaneous samples

Sal LaRussa
Genius 10040 points
Part Number: ADS1115


Hi All,

Do we have any examples of using multiple ADS1115's on a single I2C to make synchronous/concurrent measurements?

Also, any tips or examples of using HS (at 3.4 MHz) mode?

Thanks,

Sal

  • 0
    TI__Mastermind 31655 points

    Hi Sal,

    Let me look into this in more detail and get back to you.

    There is no hardware pin able to synchronize the start of each conversion, so the closest that I believe you can get is to send a single-shot conversion command to the general i2c call address, then read the conversion data sequentially from each of the ADS1115s on the bus. My concern is that I am not sure how the conversion start is tied to the i2c command, so the timing between the command and the start of the conversion may be different for each device depending on the individual clocks. I will confirm and get back to you.


    Regards,

    Scott