AK8998 Datasheet, PDF (18/59 Pages) Asahi Kasei Microsystems – Preliminary

[AK8998/W/D]
9-2-2) G1/2 Gain Adjustment Circuit
VDD=3, 3.3, 5V±5%, Ta=-20 to 85ºC, register default, unless otherwise noted
Item
Symbol
Conditions
Min. Typ. Max. units Comments
Measurement in test mode
Unadjusted
Vg1 VP-VN=80mV
1150 1200 1250 mV
G1/2 output
voltage
VDD=5V±5%
Vg2 VP-VN=40mV
550 600 650 mV
VDD=3, 3.3±5%
G1
G1sc+ EIG[3:0]=Ch
5
times
adjustment
range
G1sc- EIG[3:0]=0h
70
times
Adj. Step G1stp
2,3,5,10
times
G2 adj.
G2sc1+ EIG[4]=0h,ESTC[0]=1h
3
times
G2sc1- EIG[4]=1h,ESTC[0]=1h
1.5
times
G2sc2+ EIG[4]=0h,ESTC[0]=0h
2.352
times
G2sc2- EIG[4]=1h,ESTC[0]=0h
1.176
times
9-2-3) Offset Voltage Adjustment Circuit
VDD=3, 3.3, 5V±5%, Ta=-20 to 85ºC, register default, unless otherwise noted
Item
Symbol
Conditions
Min.
Typ.
Max. units Comments
Measurement in test mode
Unadjusted
output voltage
Vo01 VDD=3, 3.3, 5V±5% 0.5*VDD 0.5*VDD 0.5*VDD V
-0.10
+0.10
Offset rough adj.
DAC adj. range
Ocr5+
EOCR[3]=0h
EOCR[2:0]=7h
VDD=5V±5%
+11200
mV
Ocr5- EOCR[3]=1h
EOCR[2:0]=7h
VDD=5V±5%
-11200
mV
Ocr3+ EOCR[3]=0h
EOCR[2:0]=7h
VDD=3, 3.3±5%
+5600
mV
Ocr3- EOCR[3]=1h
EOCR[2:0]=7h
VDD=3, 3.3±5%
-5600
mV
Adj. step Ocr5stp VDD=5V±5%
1600
mV
Ocr3stp VDD=3, 3.3±5%
800
mV
Offset fine adj.
DAC adj. range
Ocf5+ EOCF[7]=0h
EOCF[6:0]=3Fh
VDD=5V±5%
+1016
mV
Ocf5-
EOCF[7]=1h
EOCF[6:0]=3Fh
VDD=5V±5%
-1016
mV
Ocf3+ EOCF[7]=0h
EOCF[6:0]=3Fh
VDD=3, 3.3±5%
+508
mV
Ocf3-
EOCF[7]=1h
EOCF[6:0]=3Fh
VDD=3, 3.3±5%
-508
mV
Adj. step Ocf5stp VDD=5V±5%
8
mV
Ocf3stp VDD=3, 3.3±5%
4
mV
MSxxxxx-E-00
- 18 -
2012/11