KX022-1020 Datasheet, PDF (31/75 Pages) List of Unclassifed Manufacturers – Accelerometer Specifications

± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
PART NUMBER:
KX022-1020
Rev. 11.0
10-Sep-15
Register Descriptions
Accelerometer Outputs
These registers contain up to 16-bits of valid acceleration data for each axis. Depending on the setting
of the RES bit in CTRL_REG1, the user may choose to read only the 8 MSB thus reading an effective
8-bit resolution. When BRES = 0 in BUF_CNTL2 the 8 MSB is the only data recorded in the buffer.
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 12 below. The register acceleration output
binary data is represented in 2’s complement format. For example, if N = 16 bits, then the Counts
range is from -32768 to 32767, and if N = 8 bits, then the Counts range is from -128 to 127.
16-bit
Register Data
(2’s complement)
0111 1111 1111 1111
0111 1111 1111 1110
…
0000 0000 0001
0000 0000 0000
1111 1111 1111 1111
…
1000 0000 0000 0001
1000 0000 0000 0000
Equivalent
Counts in
decimal
32767
32766
…
1
0
-1
…
-32767
-32768
Range = ±2g
+1.99994g
+1.99988g
…
+0.00006g
0.000g
-0.00006g
…
-1.99994g
-2.00000g
Range = ±4g
+3.99988g
+3.99976g
…
+0.00012g
0.0000g
-0.00012g
…
-3.99988g
-4.00000g
Range = ±8g
+7.99976g
+7.99951g
…
+0.00024g
0.0000g
-0.00024g
…
-7.99976g
-8.00000g
8-bit
Register Data
(2’s complement)
0111 1111
0111 1110
…
0000 0001
0000 0000
1111 1111
…
1000 0001
1000 0000
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Equivalent
Counts in
decimal
127
126
…
1
0
-1
…
-127
-128
Range = ±2g
+1.9844g
+1.9688g
…
+0.0156g
0.0000g
-0.0156g
…
-1.9844g
-2.000g
Range = ±4g
+3.9688g
+3.9375g
…
+0.0313g
0.0000g
-0.0313g
…
-3.9688g
-4.000g
Range = ±8g
+7.9375g
+7.8750g
…
+0.0625g
0.0000g
-0.0625g
…
-7.9375g
-8.000g
Table 12: Acceleration (g) Calculation
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