AK8998 Datasheet, PDF (24/59 Pages) Asahi Kasei Microsystems – Preliminary

Adjustment Sequence
[AK8998/W/D]
Power ON
EEPROM Write
Enable set
(Add 1Eh D[0] set)
EEPROM initialize
(Add 1Fh D[7:0] set)
Control Register
Access set
(Add 1Dh D[0] set)
Gain(G1/G2/G3) set
Add 0Ch D[4:0]=1C hex
Add 02h D[7:0]=FF hex
Measurement
mode routine
ex. Ta:25°C
ex. Pressure:0kPa
VREF adjustment
(CAdd 00h D[4:1] set
IREF adjustment
(CAdd 00h D[4:1] set
OSC adjustment
(CAdd 00h D[4:1] set
Add 10h D[3:0] set)
VTMP adjustment
(CAdd 00h D[4:1] set
Add 13h D[1] &
11h D[7:0] set)
S/H circuit output
error adjustment
routine
Offset adjustment
(Add 00h D[3:0] &
01h D[7:0] set)
ex. Pressure:100kPa
Gain(G1/G2) set
(Add 0Ch D[4:0] set)
ex. Pressure:0kPa
Offset readjustment
(Add 00h D[3:0] &
01h D[7:0] set)
Level shift set
(Add 0Ah D[0] &
0Bh D[7:0] set)
ex. Pressure:100kPa
note1) EEPROM Address is indicated by “Add”,
Control Register Address is indicated by “CAdd”.
note2) Please refer the digital part flow chart
for EEPROM / Control Register writing and reading.
Span adjustment
(Add 02h D[7:0] set)
ex. Ta:85°C
ex. Pressure:0kPa
Offset temperature
adjustment
(Add 03h D[0] &
04h D[7:0] set)
ex. Pressure:100kPa
Span temperature
adjustment
(Add 05h D[0] &
06h D[7:0] set)
ex. Pressure:0kPa
ex. Ta:25°C
Offset
fine adjustment
(Add 01h D[7:0] set)
ex. Pressure:100kPa
Span
fine adjustment
(Add 02h D[7:0] set)
ex. Pressure:0kPa
Pressure Detector 1
setting routine
Pressure Detector 2
setting routine
Control Register
Access set
(Add 1Dh D[7] set)
EEPROM Write
Enable set
(Add 1Fh D[0] set)
Power OFF
MSxxxxx-E-00
- 23 -
2012/11