Is BMA400 lowest energy consumption chip for motion logging?

[Andy__]

Is BMA400 best chip for Battery-limited, Activity tracking?   Need small size.

Continuous sensing at low power mode, Waken on motion exceeding theshold, log data and sleep as soon as possible. 

No need for highest data accuracy (16 bits not needed)

Many thanks

[FAE_CA1 · Accepted solution]

Hi,

Thanks for your inquiry.

Yes, 12-bit BMA400 is the best chip for battery-limited activity tracking. BMA400 is 2mm x 2mm x 0.95mm in size with LGA-12 package.

BMA400 has built-in auto-wakeup and auto-low power feature. This means that when there is no motion, BMA400 stays in low power mode consuming 0.85uA with fixed 25Hz sampling rate. At this moment BMA400 is always monitoring external motion. Once external motion is detected beyond the threshold for certain amount of time, BMA400 will automatically wake up and enter normal mode consuming 3.5uA with optional sampling rate from 12.5Hz to 800Hz. BMA400 can also generate an interrupt signal to the host processor indicating motion detected. When there is no motion again for certain amount of time, BMA400 will automatically go to low power mode again and send an interrupt signal to the hose processor indicating no-motion for a while.

Please see the attached "How to test BMA400 shuttle board for auto-wakeup and auto-lowpower featurev1.pdf" for more information.

Thanks.