AK8998 Datasheet, PDF (6/59 Pages) Asahi Kasei Microsystems – Preliminary

[AK8998/W/D]
2) Adjustment Accuracy
Item
Symbol Min.
Typ.
Note4)
Max.
Note5)
units
Comments
Offset adjustment accuracy
Cof
0.083
%FS
Offset temp. drift adjustment accuracy Coft
0.090
%FS
Output span adjustment accuracy
Csn
0.125
%FS
Sensitivity temp. adjustment accuracy Csnt
0.054
%FS
Sensitivity supply voltage and
temp. variation step
Cstv
0.316
0.158
%FS ESTC[0]=1h
%FS ESTC[0]=0h
Sample and hold circuit output error
Offset adjustment accuracy ^Note1)
Span adjustment accuracy ^Note2)
Offset adjustment accuracy ^Note3)
Cshe
Cofall
Csnall
Call
0.0
%FS
0.122
1.0
%FS
0.344
1.0
%FS ESTC[0]=1h
0.209
1.0
%FS ESTC[0]=0h
0.344
1.0
%FS ESTC[0]=1h
0.209
1.0
%FS ESTC[0]=0h
Note1) Cofall=(Cof^2+Coft^2)^(1/2)
Note2) Csnall=(Csn^2+Csnt^2+Cstv^2+Cshe^2)^(1/2)
Note3) Call=max(Cofall,Csnall)
Note4) Temp.=85ºC, VDD=4.75V, G1=10x, G2=1.5x(1.176x), G3=1.8x(2.3x), Offset temp. drift 1st order
coefficient=Min./Max., Sensitivity temp. drift 1st order coefficient=Min.*1/2, VOUT output
band-limited (≤500Hz @Fs=10kHz, ≤50Hz@Fs=1kHz) effective
Note5) Temp.=-20 to 85ºC, VDD=5V±5%, 3.3V±5%, 3.0V±5%, G1/G2/G3 =Min. to Max., Each
temperature coefficient=Min. to Max., VOUT output band-limited (≤500Hz @Fs=10kHz,
≤50Hz@Fs=1kHz) effective
* The adjustment accuracy is based on our definition as a reference. Please be aware the accuracy of
product depends on the sensor characteristics and adjustment method.
3) External Temperature Sensor Characteristics
Item
Symbol Min.
Sensor drive current Tsdi
Sensor temp. variation Tss
-2.4
Sensor voltage @25°C Tsv25
550
Typ.
50
-2.2
600
Max.
-2.0
650
units
µA
mV/°C
mV
Comments
50µA current drive
50µA current drive
4) Connection of Pressure Sensor and External Temperature Sensor
VS
EXTMP
AK8998
VP
VN
MSxxxxx-E-00
-6-
2012/11