參數(shù)資料
型號(hào): MPX4250ASX
廠商: MOTOROLA INC
元件分類: 壓力傳感器
英文描述: INTEGRATED PRESSURE SENSOR 20 to 250 kPa (2.9 to 36.3 psi) 0.2 to 4.9 V OUTPUT
中文描述: ABSOLUTE, PEIZORESISTIVE PRESSURE SENSOR, 2.9-36.25Psi, 1.5%, 4.62-4.76V, ROUND, THROUGH HOLE MOUNT
封裝: PLASTIC, UNIBODY PACKAGE-6
文件頁數(shù): 3/8頁
文件大?。?/td> 145K
代理商: MPX4250ASX
3
Motorola Sensor Device Data
Figure 2. Cross–Sectional Diagram
(Not to Scale)
μ
PROCESSOR
A/D
51 k
50 pF
MPX4250A
OUPUT
(PIN 1)
Figure 3. Typical Decoupling Filter for Sensor to
Microprocessor Interface
éééééééééééé
éééééééééééé
éééééééééééé
P2
SILICONE
DIE COAT
WIRE BOND
STAINLESS STEEL
METAL COVER
BOND
DIE
P1
EPOXY
CASE
LEAD FRAME
SEALED VACUUM REFERENCE
Figure 2 illustrates the absolute sensing chip in the basic
chip carrier (Case 867). A fluorosilicone gel isolates the die
surface and wire bonds from the environment, while allowing
the pressure signal to be transmitted to the sensor dia-
phragm. The MPX4250A series pressure sensor operating
characteristics, and internal reliability and qualification tests
are based on use of dry air as the pressure media. Media,
other than dry air, may have adverse effects on sensor per-
formance and long–term reliability. Contact the factory for in-
formation regarding media compatibility in your application.
Figure 3 shows a typical decoupling circuit for interfacing
the integrated MAP sensor to the A/D input of a microproces-
sor. Proper decoupling of the power supply is recommended.
Figure 4 shows the sensor output signal relative to pres-
sure input. Typical, minimum, and maximum output curves
are shown for operation over temperature range of 0
°
to
85
°
C. (The output will saturate outside of the specified pres-
sure range.)
0
O
5.0
4.5
4.0
3.5
3.0
PRESSURE (ref: to sealed vacuum) in kPa
MAX
MIN
1
2
3
4
5
6
7
8
9
1
1
1
1
1
1
1
1
1
2
2
2
2
2.5
2.0
1.5
1.0
0.5
Figure 4. Output versus Absolute Pressure
2
2
2
1
TYP
TRANSFER FUNCTION:
Vout = VS* (0.004 x P–0.04)
±
Error
VS = 5.1 Vdc
TEMP = 0 to 85
°
C
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