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Motorola Sensor Device Data
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The MPX2050 series device is a silicon piezoresistive pressure sensors providing a
highly accurate and linear voltage output — directly proportional to the applied pressure.
The sensor is a single, monolithic silicon diaphragm with the strain gauge and a thin–film
resistor network integrated on–chip. The chip is laser trimmed for precise span and offset
calibration and temperature compensation.
Features
Temperature Compensated Over 0
°
C to +85
°
C
Unique Silicon Shear Stress Strain Gauge
Easy to Use Chip Carrier Package Options
Ratiometric to Supply Voltage
Differential and Gauge Options
±
0.25% Linearity (MPX2050)
Application Examples
Pump/Motor Controllers
Robotics
Level Indicators
Medical Diagnostics
Pressure Switching
Non–Invasive Blood Pressure Measurement
Figure 1 shows a block diagram of the internal circuitry on the stand–alone pressure
sensor chip.
VS
Figure 1. Temperature Compensated Pressure Sensor Schematic
3
SENSING
ELEMENT
THIN FILM
TEMPERATURE
COMPENSATION
AND
CALIBRATION
CIRCUITRY
2
4
Vout+
Vout–
1
GND
VOLTAGE OUTPUT versus APPLIED DIFFERENTIAL PRESSURE
The differential voltage output of the sensor is directly proportional to the differential
pressure applied.
The output voltage of the differential or gauge sensor increases with increasing
pressure applied to the pressure side (P1) relative to the vacuum side (P2). Similarly,
output voltage increases as increasing vacuum is applied to the vacuum side (P2)
relative to the pressure side (P1).
SEMICONDUCTOR TECHNICAL DATA
0 to 50 kPa (0 to 7.25 psi)
40 mV FULL SCALE SPAN
(TYPICAL)
PIN NUMBER
1
2
Gnd
+Vout
3
4
VS
–Vout
NOTE: Pin 1 is noted by the notch in
the lead.
MPX2050GP
CASE 344B
MPX2050GSX
CASE 344F
MPX2050D
CASE 344
MPX2050DP
CASE 344C
REV 8
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Freescale Semiconductor, Inc.
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