JoeB

ADXL375 Output Data Rate vs. Current Consumption

Discussion created by JoeB Employee on Jan 6, 2015

Some may have noticed what looks like an interesting anomaly in the data sheet for the ADXL375.  On p. 9 of the data sheet, Fig. 18 shows Output Data Rate (ODR) vs. Current Consumption.  At an ODR of 1600 Hz, there seems to be a funky dip in current consumption.

 

fig18.jpg

This dip can be explained by a change in the ADC sample rate.  When the ODR = 50 Hz or 1600 Hz, the internal ADC sample rate is 1600 Hz.  For all other ODRs, the internal ADC sample rate is 3200 Hz.  Lower sample rate --> Lower current consumption!

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