AK8999AD Datasheet, PDF (5/68 Pages) Asahi Kasei Microsystems – Pressure Sensor Control IC

CONFIDENTIAL
[AK8999A/AW/AD]
2) Adjustment Accuracy
Adjustment accuracy targets are shown below.
2.1) The case of 1st order adjustment
Parameter
Symbol Min.
Typ.
Note4)
Max.
Note5) Units Description
Offset adjustment accuracy
Cof
0.083
%FS
Offset temp. drift adjustment accuracy
Coft
0.120
%FS
Output span adjustment accuracy
Csn
0.146
%FS
Sensitivity temp. adjustment accuracy
Csnt
0.114
%FS
Sensitivity supply voltage and
Cstv
temp. variation step
0.057
%FS
Sample and hold circuit output error
Offset adjustment accuracy ^Note1)
Span adjustment accuracy ^Note2)
Offset adjustment accuracy ^Note3)
Cshe
Cofall
Csnall
Call
0.0
0.146
0.194
0.194
%FS
1.0
%FS
1.0
%FS
1.0
%FS
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. = 25ºC, VDD = 5V, G1 = 10x, G2 = 1.5x, G3 = 1.8x, Offset temp. drift 1st order coefficient = Min. or
Max., Sensitivity temp. drift 1st order coefficient = Min., VOUT output band-limited effective
(≤ 500Hz@Fs = 8.33kHz, ≤ 50Hz@Fs = 0.83kHz)
Note5) Temp. = -40 to 105ºC, VDD = 5V ± 10%, 3.3V ± 10%, 3.0V ± 10%, G1/G2/G3 = Min. to Max.,
Each temp. coefficient = Min. to Max., VOUT output band-limited effective
(≤ 500Hz@Fs = 8.33kHz, ≤ 50Hz@Fs = 0.83kHz)
2.2) The case of quasi 2nd order adjustment by piecewise linear approximation
Parameter
Symbol Min.
Typ.
Note9)
Max.
Note10)
Units
Description
Offset adjustment accuracy
Cof
0.083
%FS
Offset temp. drift adjustment accuracy
Coft
0.120
%FS
Offset temp. drift adjustment switching
accuracy using the piecewise linear
Coftc
0.0
%FS
approximation method
Output span adjustment accuracy
Csn
0.146
%FS
Sensitivity temp. adjustment accuracy
Csnt
0.114
%FS
Sensitivity temp. adjustment switching
accuracy using the piecewise linear
Csntc
0.0
%FS
approximation method
Sensitivity supply voltage and
Cstv
temp. variation step
0.057
%FS
Sample and hold circuit output error
Offset adjustment accuracy ^Note6)
Span adjustment accuracy ^Note7)
Offset adjustment accuracy ^Note8)
Cshe
Cofall
Csnall
Call
0.0
0.146
0.194
0.194
%FS
1.0
%FS
1.0
%FS
1.0
%FS
Note6) Cofall = (Cof^2+Coft^2)^(1/2)
Note7) Csnall = (Csn^2+Csnt^2+Cstv^2+Cshe^2)^(1/2)
Note8) Call = max(Cofall,Csnall)
Note9) Temp. = 25ºC, VDD = 5V, G1 = 10x, G2 = 1.5x, G3 = 1.8x, Offset temp. drift 1st order coefficient = Min. or
Max., Sensitivity temp. drift 1st order coefficient = Min., VOUT output band-limited effective
(≤ 500Hz@Fs = 8.33kHz, ≤50Hz@Fs=0.83kHz)
Note10) Temp. = -40 to 105ºC, VDD = 5V ± 10%, 3.3V ± 10%, 3.0V ± 10%, G1/G2/G3 = Min. to Max.,
Each temp. coefficient = Min. to Max., VOUT output band-limited effective
(≤ 500Hz@Fs = 8.33kHz, ≤ 50Hz@Fs = 0.83kHz)
* The adjustment accuracy is based on our definition. Please be careful the accuracy of product depends on the
sensor characteristics and adjustment method.
MS1600-E-00
-5-
2014/05