AK8996 Datasheet, PDF (59/74 Pages) Asahi Kasei Microsystems – Pressure Sensor Interface IC

[AK8996/W]
d) Sensitivity temperature drift adjustment (Register names: ST2P, ST2N, ST1PS, ST1P,
ST1NS, ST1N)
Adjusts the sensitivity temperature secondary characteristics inherent to a sensor and the AK8996.
After performing the span voltage adjustment at 25ºC, use the register's sensitivity temperature drift
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)
d-1) Sensitivity temperature drift 2^nd order coefficient adjustment (Register names: ST2P,
ST2N)
Address: 07 hex D[7:0]=EST2P[7:0], 08 hex D[7:0]=EST2N[7:0]
EST2P/N2[6:0]
Dec Hex
Bin
Ratio
(%)
EST2P/N[7]:0
VDD: 5V / 3V
EST2P/N[7]:1
VDD: 5V / 3V
Comments
0
00 0000000 100.000
0.00160000
/0.00080000
-0.00160000
/-0.00080000
Default
1 01 0000001 99.213
0.0015874
/0.0007937
-0.0015874
/-0.0007937
…..
16 10 0010000 87.402
0.00139842
/0.00069921
-0.00139842
/-0.00069921
…..
32 20 0100000 74.803
0.00119685
/0.000598425
-0.00119685
/-0.000598425
…..
64 40 1000000 49.606
0.0007937
/0.00039685
-0.0007937
/-0.00039685
…..
126 3E 1111110 0.7874
0.0000126
/0.000006299
-0.0000126
/-0.000006299
127 3F 1111111 0.0
0.0
0.0
MS1055-E-02
59
2011/12