1

Motorola Sensor Device Data

50 kPa

Uncompensated

Silicon Pressure Sensors

The MPX50 silicon piezoresistive pressure sensor provides 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.

Features

• Low Cost

• Patented Silicon Shear Stress Strain Gauge Design

• Ratiometric to Supply Voltage

• Easy to Use Chip Carrier Package Options

• 60 mV Span (Typ)

• Differential and Gauge Options

•±0.25% (Max) Linearity

Application Examples

• Air Movement Control

• Environmental Control Systems

• Level Indicators

• Leak Detection

• Medical Instrumentation

• Industrial Controls

• Pneumatic Control Systems

• Robotics

Figure 1 shows a schematic of the internal circuitry on the stand–alone pressure

sensor chip.

Figure 1. Uncompensated Pressure Sensor Schematic

PIN 3

X–ducer

PIN 2

PIN 4

+ Vout

– Vout

+ VS

PIN 1

VOLTAGE OUTPUT versus APPLIED DIFFERENTIAL PRESSURE

The differential voltage output of the X–ducer 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).

Senseon and X–ducer are trademarks of Motorola, Inc.

Order this document

by MPX50/D

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

BASIC CHIP

CARRIER ELEMENT

CASE 344–15, STYLE 1

DIFFERENTIAL

PORT OPTION

CASE 344C–01, STYLE 1

MPX50

SERIES

0 to 50 kPa (0 – 7.25 psi)

60 mV FULL SCALE SPAN

(TYPICAL)

NOTE: Pin 1 is the notched pin.

PIN NUMBER

1

2

Gnd

+Vout

3

4

VS

–Vout

REV 5