AK8996 Datasheet, PDF (57/74 Pages) Asahi Kasei Microsystems – Pressure Sensor Interface IC

[AK8996/W]
c) Offset voltage temperature drift adjustment
Adjusts the offset voltage temperature secondary characteristics inherent to a sensor and the
AK8996. After performing the offset voltage adjustment at 25ºC, use the register's offset voltage
temperature characteristic coefficients for adjustment so that the absolute values of the AK8996's
coefficient are matched to those of the sensor's coefficient. (See 1) Adjustment Procedure
Description in "Functional Description" in the "Adjustment Sequence" section)
c-1) Offset voltage temperature drift 2^nd order coefficient adjustment (Register name: OT2)
Address: 04 hex D[7:0]=EOT2[7:0]
EOT2[6:0]
Ratio
Dec Hex
Bin
(%)
0 00 0000000 100.000
1 01 0000001 99.213
…..
16 10 0010000 87.402
…..
32 20 0100000 74.803
…..
64 40 1000000 49.606
…..
126 3E 1111110 0.7874
127 3F 1111111 0.0
EOT2[7]:0
VDD: 5V / 3V
0.00160000
/0.00080000
0.0015874
/0.0007937
0.00139842
/0.00069921
0.00119685
/0.000598425
0.0007937
/0.00039685
0.0000126
/0.000006299
0.0
EOT2[7]:1
VDD: 5V / 3V
-0.00160000
/-0.00080000
-0.0015874
/-0.0007937
-0.00139842
/-0.00069921
-0.00119685
/-0.000598425
-0.0007937
/-0.00039685
-0.0000126
/-0.000006299
0.0
Comments
Default
MS1055-E-02
57
2011/12