AN4508 datasheet(10/13 Pages) STMICROELECTRONICS

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AN4508 Datasheet(PDF) 10 Page - STMicroelectronics

Part #	AN4508

Description	Parameters and calibration of a low-g 3-axis accelerometer

PDF	13 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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10 / 13 page

Least square method

AN4508

10/13

DocID026444 Rev 1



At Yb up position (P4 position),

, and assume that at Yb up

position, n4 sets of accelerometer raw data Ax, Ay and Az have been collected. Then,

Equation 8



At Xb down position (P5 position),

, and assume that at Xb

down position, n5 sets of accelerometer raw data Ax, Ay and Az have been collected.

Then,

Equation 9



At Xb up position (P6 position),

, and assume that at Xb up

position, n6 sets of accelerometer raw data Ax, Ay and Az have been collected. Then,

Equation 10

Combine Equation 5 to 10 and let n = n1 + n2 + n3 + n4 + n5 + n6, then Equation 4

becomes:

Equation 11

where:

Equation 12

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