M OT O RO LA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MPX2050/D
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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.
0 to 50 kPa (0 to 7.25 psi)
40 mV FULL SCALE SPAN
(TYPICAL)
Features
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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
MPX2050D
CASE 344
±0.25% Linearity (MPX2050)
Application Examples
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Pump/Motor Controllers
Robotics
Level Indicators
Medical Diagnostics
Pressure Switching
Non–Invasive Blood Pressure Measurement
MPX2050GP
CASE 344B
Figure 1 shows a block diagram of the internal circuitry on the stand–alone pressure
sensor chip.
V
S
3
T HI N FI L M
T EM P ER ATU R E
CO M PE N SATI O N
A ND
2
4
V
o
u
u
t
t
+
-
SE NSI NG
EL E ME NT
V
o
CAL IB R ATI O N
CI RCU I TRY
MPX2050DP
CASE 344C
1
G
N
D
Figure 1. Temperature Compensated Pressure Sensor Schematic
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).
MPX2050GSX
CASE 344F
PIN NUMBER
1
2
Gnd
+V
3
4
V
S
–V
out
out
NOTE: Pin 1 is noted by the notch in
the lead.
REV 8
Motorola Sensor Device Data
1
Motorola, Inc. 2002