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by MPX100/D
SEMICONDUCTOR TECHNICAL DATA
The MPX100 series device is a silicon piezoresistive pressure sensor providing a very
accurate and linear voltage output — directly proportional to the applied pressure. This
standard, low cost, uncompensated sensor permits manufacturers to design and add
their own external temperature compensating and signal conditioning networks.
Compensation techniques are simplified because of the predictability of Motorola’s single
element strain gauge design.
0 to 100 kPa (0–14.5 psi)
60 mV FULL SCALE SPAN
(TYPICAL)
Features
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Low Cost
Patented, Silicon Shear Stress Strain Gauge Design
Easy to Use Chip Carrier Package Options
Ratiometric to Supply Voltage
60 mV Span (Typ)
BASIC CHIP
CARRIER ELEMENT
CASE 344–15, STYLE 1
Absolute, Differential and Gauge Options
±0.25% Linearity (Max)
Application Examples
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Pump/Motor Controllers
Robotics
Level Indicators
Medical Diagnostics
Pressure Switching
Barometers
DIFFERENTIAL
PORT OPTION
Altimeters
CASE 344C–01, STYLE 1
Figure 1 illustrates a schematic of the internal circuitry on the stand–alone pressure
sensor chip.
NOTE: Pin 1 is the notched pin.
PIN 3
+ V
S
PIN NUMBER
PIN 2
+ V
1
2
Gnd
+V
3
4
V
S
out
X–ducer
–V
out
out
PIN 4
– V
out
PIN 1
Figure 1. Uncompensated Pressure Sensor Schematic
VOLTAGE OUTPUT versus APPLIED DIFFERENTIAL PRESSURE
The differential voltage output of the X–ducer is directly proportional to the differential
pressure applied.
The absolute sensor has a built–in reference vacuum. The output voltage will decrease
as vacuum, relative to ambient, is drawn on the pressure (P1) side.
The output voltage of the differential or gauge sensor increases with increasing
pressure applied to the pressure (P1) side relative to the vacuum (P2) side. Similarly,
output voltage increases as increasing vacuum is applied to the vacuum (P2) side
relative to the pressure (P1) side.
X–ducer is a trademark of Motorola, Inc.
REV 6
Motorola Sensor Device Data
1
Motorola, Inc. 1998