AK8998 Datasheet, PDF (49/59 Pages) Asahi Kasei Microsystems – Preliminary

[AK8998/W/D]
i) Input gain adjustment (EEPROM name: ING)
EEPROM for setting the total gain.
The input gain is adjusted according to the full-scale voltage of the pressure sensor.
i-1) Sensitivity temperature drift adj. range: -4000ppm/°C to +2500ppm/°C (ESTC[0]=1h)
Address : 0C hex D[4:0]=EIG[4:0]
EIG[3:0]
G1 Gain
Dec Hex
Bin
(times)
00
11
22
33
44
55
66
77
88
99
10 A
11 B
12 C
13 D
14 E
15 F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
70.0
60.0
50.0
40.0
35.0
30.0
25.0
20.0
15.0
12.0
10.0
7.0
5.0
Setup
prohibited
Total Gain (times)
EIG[4]=0 EIG[4]=1
G2: 3x
G2: 1.5x
210.0
105.0
180.0
90.0
150.0
75.0
120.0
60.0
105.0
52.5
90.0
45.0
75.0
37.5
60.0
30.0
45.0
22.5
36.0
18.0
30.0
15.0
21.0
10.5
15.0
7.5
Setup
Setup
prohibited prohibited
Comments
Default
i-2) Sensitivity temperature drift adj. range: -2500ppm/°C to +1000ppm/°C (ESTC[0]=0h)
Address : 0C hex D[4:0]=EIG[4:0]
EIG[3:0]
G1 Gain
Dec Hex
Bin
(times)
00
11
22
33
44
55
66
77
88
99
10 A
11 B
12 C
13 D
14 E
15 F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
70.0
60.0
50.0
40.0
35.0
30.0
25.0
20.0
15.0
12.0
10.0
7.0
5.0
Setup
prohibited
Total Gain (times)
EIG[4]=0 EIG[4]=1
G2: 2.352x G2: 1.176x
164.7
82.4
141.2
70.6
117.6
58.8
94.1
47.1
82.4
41.2
70.6
35.3
58.8
29.4
47.1
23.5
35.3
17.6
28.2
14.1
23.5
11.8
16.5
8.2
11.8
5.9
Comments
初期値
Setup
Setup
prohibited prohibited
MSxxxxx-E-00
- 46 -
2011/12