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AK8999AW Datasheet, PDF (52/68 Pages) Asahi Kasei Microsystems – Pressure Sensor Control IC
CONFIDENTIAL
[AK8999A/AW/AD]
d) Offset voltage temperature drift adjustment (EEPROM name: OTP, OTN)
The offset voltage temperature drift for the pressure sensor is adjusted, including the AK8999A internal
error.
After performing the offset voltage adjustment at 25C, use the EEPROM's offset voltage temperature
characteristic coefficients for adjustment so that the absolute values of the AK8999A's coefficient are matched
to those of the sensor's coefficient.
d.1) Offset voltage temperature drift adjustment (EEPROM name: OTP, OTN, EOCF[7] = 0h)
Address : 03 hex D[1:0] = EOTP/N[8], Address :04 hex, 05 hex D[7:0] = EOTP/N[7:0]
EOTP/N[7:0]
Ratio
VDD:3V, 3.3V
VDD:5V
Dec Hex
Bin
EOTP/N EOTP/N EOTP/N EOTP/N
Description
(%) [8] = 0 [8] = 1 [8] = 0 [8] = 1
(mV/C) (mV/C) (mV/C) (mV/C)
0 00 00000000 0.00
0.000
0.000
0.000
0.000 Default
1 01 00000001 0.39
0.072
-0.072
0.144
-0.144
2 02 00000010 0.78
0.145
-0.145
0.289
-0.289
3 03 00000011 1.18
0.217
-0.217
0.433
-0.433
4 04 00000100 1.57
0.289
-0.289
0.577
-0.577
::
:
:
:
:
:
:
122 7A 01111010 47.84
8.803
-8.803 17.606 -17.606
123 7B 01111011 48.24
8.876
-8.876 17.751 -17.751
126 7E 01111110 49.41
9.092
-9.092 18.184 -18.184
127 7F 01111111 49.80
9.164
-9.164 18.328 -18.328
128 80 10000000 50.20
9.236
-9.236 18.472 -18.472
129 81 10000001 50.59
9.308
-9.308 18.616 -18.616
130 82 10000010 50.98
9.381
-9.381 18.761 -18.761
131 83 10000011 51.37
9.453
-9.453 18.905 -18.905
132 84 10000100 51.76
9.525
-9.525 19.049 -19.049
133 85 10000101 52.16
9.597
-9.597 19.194 -19.194
::
:
:
:
:
:
:
204 CC 11001100 80.00
14.72
-14.72
29.44
-29.44
205 CD 11001101 80.39
14.79
-14.79
29.58
-29.58
::
:
:
:
:
:
:
223 DF 11011111 87.45
16.09
-16.09
32.18
-32.18
::
:
:
:
:
:
:
236 EC 11101100 92.55 17.029 -17.029 34.058 -34.058
237 ED 11101101 92.94 17.101 -17.101 34.202 -34.202
::
:
:
:
:
:
:
255 FF 11111111 100.00 18.400 -18.400 36.800 -36.800
MS1600-E-00
- 52 -
2014/05