ON-CHIP TEMPERATURE COMPENSATION, CALIBRATION AND SIGNAL CONDITIONING
The performance over temperature is achieved by
from the factory. Contact the factory for information regarding
integrating the shear-stress strain gauge, temperature
media tolerance in your application.
compensation, calibration and signal conditioning circuitry
Figure 3 shows the recommended decoupling circuit for
onto a single monolithic chip.
interfacing the output of the MPXV5004G to the A/D input of
Figure 2 illustrates the gauge configuration in the basic
the microprocessor or microcontroller. Proper decoupling of
chip carrier (Case 482). A fluorosilicone gel isolates the die
the power supply is recommended.
surface and wire bonds from the environment, while allowing
Figure 4 shows the sensor output signal relative to
the pressure signal to be transmitted to the silicon diaphragm.
pressure input. Typical, minimum and maximum output
The MPXV5004G series sensor operating characteristics
are based on use of dry air as pressure media. Media, other
curves are shown for operation over a temperature range of
10°C to 60°C using the decoupling circuit shown in Figure 3
than dry air, may have adverse effects on sensor
The output will saturate outside of the specified pressure
performance and long-term reliability. Internal reliability and
range.
qualification test for dry air, and other media, are available
Fluorosilicone
Gel Die Coat
Wire Bond
Die
P1
Stainless
Steel Cap
Thermoplastic
Case
Lead Frame
1.0 µF
P2
Differential Sensing
Element
Die Bond
Figure 2. Cross-Sectional Diagram (Not to Scale)
+5 V
Vout
Vs
IPS
0.01 µF
GND
OUTPUT
470 pF
5.0
TRANSFER FUNCTION:
Vout = VS*[(0.2*P) + 0.2] ± 2.5% VFSS
4.0
VS = 5.0 V ± 0.25 Vdc
TEMP = 10 to 60°C
3.0
Max
Min
2.0
Typical
Figure 3. Recommended Power Supply Decoupling and
Output Filtering.
(For additional output filtering, please refer to Application
Note AN1646.)
1.0
2 kPa
200 mm H2O
4 kPa
400 mm H2O
Figure 4. Output versus Pressure Differential
at ±2.5% VFSS
(See Note 5 in Operating Characteristics)
Sensors
Freescale Semiconductor
MPXV5004G
3