AK8999AW Datasheet, PDF (48/68 Pages) Asahi Kasei Microsystems – Pressure Sensor Control IC

CONFIDENTIAL
[AK8999A/AW/AD]
a.2) Offset voltage fine adjustment (OCF)
The offset voltage is adjusted finely.
The offset adjustment voltage varies ratiometrically with respect to the supply voltage.
The ratio in the table below is benchmarked to a VOUT output of 4800mV (@VDD: 5V) as 100%
(Ratio = (Offset voltage @VDD: 5V)/4800[mV]*100[%]).
Address : 01hex D[7:0] = EOCF[7:0]
EOCF [6:0]
Ratio VDD:3V, 3.3V
EOCF EOCF
Dec Hex
Bin
(%) [7] = 0 [7] = 1
(mV)
(mV)
0 00 0000000
0
0
0
1 01 0000001 0.17
4
-4
：：
：
：
：
：
15 0F 0001111 2.50
60
-60
16 10 0010000 2.67
64
-64
：：
：
：
：
：
31 1F 0011111 5.17
124
-124
32 20 0100000 5.33
128
-128
：：
：
：
：
：
63 3F 0111111 10.50
252
-252
64 40 1000000 10.67
256
-256
：：
：
：
：
：
126 7E 1111110 21.00
504
-504
127 7F 1111111 21.17
508
-508
VDD:5V
EOCF EOCF
[7] = 0
(mV)
[7] = 1
(mV)
0
0
8
-8
：
：
120
-120
128
-128
：
：
248
-248
256
-256
：
：
504
-504
512
-512
：
：
1008
-1008
1016
-1016
Description
Default
b) Output span voltage adjustment (EEPROM name: SCR, SC)
The span voltage is adjusted.
The magnification in the table below is benchmarked to a VOUT output of 4800 mV (@VDD: 5V) as 100%
(Ratio = (Output voltage @VDD: 5V)/4800[mV]*100[%]).
The output and sensitivity describes the adjustable output voltages with the assumed reference output
(2400mV@VDD: 3V, 4800mV@VDD: 5V) when ESC[7:0] = 0 dec.
b.1) Output span voltage coarse adjustment (EEPROM name: SCR)
The output span voltage is adjusted coarsely.
Address : 00 hex D[7] = ESCR[0]
D[7:0] Symbol
Mode setup
D[7] ESCR[0] Output span voltage coarse adjustment
0 SCRH 3.0x (1.57x to 3.0x) (defult)
1 SCRL 1.8x (1.1x to 1.8x)
MS1600-E-00
- 48 -
2014/05