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ADS1013: SPS rate at lower I2C speed

Vincenzo Pizzolante
Mastermind 25976 points

Part Number: ADS1013

hi,

we are considering using ADS1013/14 in a BMS system.

We want to measure 1 (or more) differential signal(s).

to preserve some battery we will drive I2C at minimum possible.

how low can we go to grant 3.3kSPS rate?

thansk a lot 

KR

Vincenzo

  • 0
    TI__Mastermind 25040 points

    Hello Vincenzo,

    If power savings it highest priority, I suggest duty cycling the device.

    The ADS101x support duty cycling that yield significant power savings by periodically requesting high data rate readings at an effectively lower data rate. For example, an ADS101x in power-down state with a data rate set to 3300 SPS can be operated by a microcontroller that instructs a single-shot conversion every 7.8ms (128 SPS). A conversion at 3300 SPS only requires approximately 0.3 ms, so the ADS101x enter power down state for the remaining 7.5 ms.  In this configuration, the ADS101x consume approximately 1/25th the power that is otherwise consumed in continuous-conversion mode. The duty cycling rate is completely arbitrary and is defined by the master controller.

    If interested in  noise improvements, the ADS101x offers lower data rates that do not implement duty cycling.

    Regards

    Cynthia