Electronic Supplement to
Performance of Several Low-Cost Accelerometers

by J. R. Evans, R. M. Allen, A. I. Chung, E. S. Cochran, R. Guy, M. Hellweg, and J. F. Lawrence

Table S2. Summary of Sensor Noise Levels and Effective Resolution *

* Peak to peak so equivalent to viable word width or digital data.
† Normal typeface are RMS noise in mg; boldface are bits peak-to-peak.

Model	Channel	# Data	Wideband RMS Noise (mg; bits PTP) †
			Mean	Minimum	Median	Maximum
Droid	1	8	0.307	0.065	0.241	0.612
	2	8	0.290	0.112	0.264	0.598
	3	8	0.311	0.205	0.294	0.488
	Combined	24	0.303	0.065	0.264	0.612
			13.7	15.9	13.9	12.7
JWF14	1	6	0.152	0.134	0.157	0.166
	2	6	0.157	0.140	0.162	0.173
	3	6	0.179	0.155	0.180	0.193
	Combined	18	0.163	0.134	0.163	0.193
			14.6	14.9	14.6	14.3
Phidget (single one-axis example)	1	1	0.105
	2	0
	3	0
	Combined	1	0.105
			15.2
OnaviA	1	3	0.053	0.052	0.052	0.054
	2	3	0.053	0.041	0.051	0.067
	3	3	0.081	0.068	0.086	0.089
	Combined	9	0.062	0.041	0.054	0.089
			16.0	16.6	16.2	15.5
OnaviB	1	2	0.045	0.043		0.046
	2	2	0.042	0.042		0.042
	3	2	0.073	0.072		0.073
	Combined	6	0.053	0.042		0.073
			16.2	16.5		15.7
GCDC (single three-axis example)	1	1	0.12
	2	1	0.016
	3	1	0.059
	Combined	3	0.029		0.016
			17.1		17.9
For comparison, the LSB in mg for span of ±2 g	for 12 bits		0.977 mg
	for 16 bits		0.061 mg
	for 22 bits		0.001 mg

[ Back ]