MPX4100 Ver la hoja de datos (PDF) - Motorola => Freescale
Número de pieza
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MPX4100 Datasheet PDF : 8 Pages
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FLUORO SILICONE
GEL DIE COAT
STAINLESS
DIE
STEEL CAP
WILREEABDONDÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉP1 ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉDPEILCEPAAOSSXTEYIC
FRAME
ABSOLUTE ELEMENT
BOND
SEALED VACUUM REFERENCE P2
Figure 2. Cross Sectional Diagram
(Not to Scale)
SENSOR
OUTPUT
(PIN 1)
50 pF
MPX4100 SERIES
A/D
51 k
µ PROCESSOR
Figure 3. Decoupling Filter for Sensor to
Microprocessor Interface
Figure 2 illustrates an 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 MPX4100A 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
performance and long–term reliability. Contact the factory for
information 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 decoupilng 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 a temperature range of 0° to
85°C. (The output will saturate outside of the specified pres-
sure range.)
5.0
4.5 TRANSFER FUNCTION:
MAX
4.0
Vout = Vs* (.01059*P–.152) ± Error
VS = 5.1 Vdc
3.5 TEMP = 0 to 85°C
TYP
3.0
20 kPa TO 105 kPa
MPX4100A
2.5
2.0
1.5
1.0
MIN
0.5
0
Pressure (ref: to sealed vacuum) in kPa
Figure 4. Output versus Absolute Pressure
Motorola Sensor Device Data
3
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