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Noise peformance on ADXL345 and ADXL202

Question asked by Tarzan on Feb 20, 2014
Latest reply on Feb 24, 2014 by Tarzan

I wondered which has a better noise peformance between analogoutput type and digital outputtype.
According to the datasheet ADXL202(analog output type),
The output noise is 1.4mg_rms@100Hz from Table 7.
http://www.analog.com/static/imported-files/data_sheets/ADXL103_203.pdf

On the other hand, ditital output type, ADXL345's noise peformance is 0.75LSBrms LSB@100Hz from the datasheet.
http://www.analog.com/jp/mems-sensors/mems-inertial-sensors/adxl345/products/product.html

I'm not sure that which is a better spec between 0.75LSBrms and 1.4mg_rms.
Please tell me how to compare [mgrms] and [LSBrms].

 

Best,
Tarzan

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