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AK8996W Datasheet, PDF (31/71 Pages) HuaXinAn Electronics CO.,LTD – Pressure Sensor Control IC | |||
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[AK8996/W]
7. å§åã»ã³ãµã¼&AK8996ãªãã»ããåã³æ度温度2次ç¹æ§èª¿æ´
以ä¸ã«ç¤ºããããã¯å³ããã¨ã«ãå§åã»ã³ãµã¼ã®æã¤æ¸©åº¦ç¹æ§ï¼2次ç¹æ§ï¼ã調æ´ããããã®å
·ä½çãª
æ¹æ³ã説æãã¾ãã
æ³¨ï¼ èª¿æ´ç²¾åº¦ãä¸ããããã«ã使ç¨ããã温度min./max.ã§èª¿æ´ãè¡ã£ã¦ä¸ããã
AC[1:0]
2ND[1:0]
OT2, OT1S,
OT1
ST2P, ST2N,
ST1PS, ST1P,
ST1NS, ST1N
2nd order function
generation block
Offset Temp.
+/- Gain
Temp.
STV
+40mV
VP
OTSW[0]
STSW[0]
0.5*VS
Gain Amp.1 Gain Amp.2 Gain Amp.3
VN
-40mV
ING
OCR, OCF
SCS, SC
INSW[1:0]
Temperature
Sensor
2nd order
characteristic
generator
2nd order function generation block
EOT2[7:0] EST2P[7:0]
EST2N[7:0]
2nd order
characteristic
tuning
1st order
characteristic
tuning
EOT1[9:0] EST1P[9:0]
EST1N[9:0]
2ND[1:0]
以ä¸ã®å¼ã«ç¤ºããããããªå§åã»ã³ãµã¼ã®ãªãã»ããåã³æ度2次温度ç¹æ§ããAK8996ã®æã¤åç¹æ§ãç¨
ãã¦ãã£ã³ã»ã«ãããã¨ã§ãå®ç¾ãã¾ãã
å§åã»ã³ãµã¼ãªãã»ããåã³æ度2次温度ç¹æ§Vsen(T)ï¼
Vsen (T) = αT^2+βT+γ
AK8996ãªãã»ããåã³æ度2次温度ç¹æ§Vic(T)ï¼
Vic=[(g*a)T^2+(g*b)T+(g*c)]+[dT+e]=(g*a)T^2+(g*b+d)T+(g*c+e)
2次é¢æ°
1次é¢æ°
2次温度ç¹æ§ããã£ã³ã»ã«ããããã«ã¯ã以ä¸ã«èª¬æãã測å®ãæä½3温度ï¼ex. 25°C, -40°C, +105°Cï¼ã§å®
æ½ããå¿
è¦ãããã¾ãã
MS1055-J-04
31
2011/12
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