KXTIK-1004 Datasheet, PDF (16/54 Pages) List of Unclassifed Manufacturers – 2g/4g/8g Tri-axis Digital Accelerometer Specifications

± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
PART NUMBER:
KXTIK-1004
Rev. 2
Dec-2011
KXTIK 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 Figure 1 below. The register acceleration output binary data is represented in N-bit
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
(2’s complement)
0111 1111 1111
0111 1111 1110
…
0000 0000 0001
0000 0000 0000
1111 1111 1111
…
1000 0000 0001
1000 0000 0000
Equivalent
Counts in decimal
2047
2046
…
1
0
-1
…
-2047
-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
(2’s complement)
0111 1111
0111 1110
…
0000 0001
0000 0000
1111 1111
…
1000 0001
1000 0000
Equivalent
Counts in decimal
127
126
…
1
0
-1
…
-127
-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
36 Thornwood Dr. – Ithaca, NY 14850
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Figure 1. Acceleration (g) Calculation
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