KXCJK-1013 Datasheet, PDF (18/31 Pages) List of Unclassifed Manufacturers – Accelerometer Specifications

± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
PART NUMBER:
KXCJK-1013
Rev. 2
Dec-2012
KXCJK Register Descriptions
Accelerometer Outputs
These registers contain up to 12-bits of valid acceleration data for each axis depending on the setting
of the RES bit in CTRL_REG1, where the acceleration outputs are represented in 12-bit valid data
when RES = ‘1’ and 8-bit valid data when RES = ‘0’. The data is updated every user-defined ODR
period, is protected from overwrite during each read, and can be converted from digital counts to
acceleration (g) per Table 11 below. The register acceleration output binary data is represented in 2’s
complement format. For example, if N = 12 bits, then the Counts range is from -2048 to 2047, and if N
= 8 bits, then the Counts range is from -128 to 127.
12-bit
Register Data
Equivalent
(2’s complement) Counts in decimal
0111 1111 1111
2047
0111 1111 1110
2046
…
…
0000 0000 0001
1
0000 0000 0000
0
1111 1111 1111
-1
…
…
1000 0000 0001
-2047
1000 0000 0000
-2048
Range = +/-2g
+1.999g
+1.998g
…
+0.001g
0.000g
-0.001g
…
-1.999g
-2.000g
Range = +/-4g
+3.998g
+3.996g
…
+0.002g
0.000g
-0.002g
…
-3.998g
-4.000g
Range = +/-8g
+7.996g
+7.992g
…
+0.004g
0.000g
-0.004g
…
-7.996g
-8.000g
8-bit
Register Data
Equivalent
(2’s complement) Counts in decimal
0111 1111
127
0111 1110
126
…
…
0000 0001
1
0000 0000
0
1111 1111
-1
…
…
1000 0001
-127
1000 0000
-128
Range = +/-2g
+1.984g
+1.968g
…
+0.016g
0.000g
-0.016g
…
-1.984g
-2.000g
Range = +/-4g
+3.968g
+3.936g
…
+0.032g
0.000g
-0.032g
…
-3.968g
-4.000g
Range = +/-8g
+7.936g
+7.872g
…
+0.064g
0.000g
-0.064g
…
-7.936g
-8.000g
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Table 11. Acceleration (g) Calculation
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