AK8996 Datasheet, PDF (61/74 Pages) Asahi Kasei Microsystems – Pressure Sensor Interface IC

[AK8996/W]
f) BUF gain adjustment (Register name: BUFG)
Sets up the buffer circuit's gain.
After the level shift voltage is determined by the VOUT voltage, use EOG[2:0] for gain adjustment so
that the detection maximum output is 4000mV (@VDD: 5.0V) with Vop (level shift voltage is
uppermost or lowermost) or Vpp (± output centered on the level shift voltage).
Address: 0E hex D[2:0]=EOG[2:0]
EOG[2: 0]
Ratio
Dec Hex Bin
(%)
0
0
000
100
1
1
001
125
2
2
010
150
3
3
011
175
4
4
100
200
Note 1) Dec 5 to 7 are unavailable.
BUFF gain
(times)
2.0
2.5
3.0
3.5
4.0
Total
(times)
25.00
31.25
37.50
43.75
50.00
Comments
Default
g) Pressure detector disable time (Register name: AS)
Sets up the pressure detector disable time.
In order for the pressure detector to accurately detect the pressure at power-up or standby exit ("L" to "H" at
STBYN pin), it must wait until the VOUT pin output reference voltage is stabilized (See Section 3 Pressure
Detection & Determination Circuit Operation at Power-Up and Standby Exit (STBYN pin "L" to "H") in
"Functional Description").
g-1) Pressure detection valid (EINT1[1:0]=1h)
Address : 0F hex D[2:0]=EAS[2:0]
EAS[2: 0]
Pressure Detector Disable Time (msec)
Dec Hex Bin fs: 100Hz fs: 1kHz fs: 2kHz fs: 10kHz
0
0
000
10
1.0
0.5
0.1
1
1
001
10
1.0
0.5
0.2
2
2
010
20
2.0
1.0
0.4
3
3
011
60
6.0
3.0
0.8
4
4
100
140
14.0
7.0
1.6
5
5
101
300
30.0
15.0
3.1
6
6
110
620
62.0
31.0
6.3
7
7
111
1260
126.0
63.0
12.5
Comments
Default
g-2) Pressure detection & self diagnosis valid (EINT1[1:0]=3h)
Address : 0F hex D[2:0]=EAS[2:0]
EAS[2: 0]
Pressure Detector Disable Time (msec)
Dec Hex Bin fs: 100Hz fs: 1kHz fs: 2kHz fs: 10kHz
0
0
000
10.2
1.2
0.7
0.3
1
1
001
10.2
1.2
0.7
0.3
2
2
010
40.2
4.2
2.2
0.6
3
3
011
80.2
8.2
4.2
1.0
4
4
100
160.2
16.2
8.2
1.8
5
5
101
320.2
32.2
16.2
3.3
6
6
110
640.2
64.2
32.2
6.5
7
7
111
1280.2
128.2
64.2
12.7
Comments
Default
MS1055-E-02
61
2011/12