ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005

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Motorola Sensor Device Data

50 kPa

On-Chip Temperature

Compensated & Calibrated

Silicon Pressure Sensors

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.

Figure 1. Temperature Compensated Pressure Sensor Schematic

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SENSING

ELEMENT

THIN FILM

TEMPERATURE

COMPENSATION

AND

CALIBRATION

CIRCUITRY

2

4

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).

Order this document

by MPX2050/D

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

MPX2050

SERIES

0 to 50 kPa (0 to 7.25 psi)

40 mV FULL SCALE SPAN

(TYPICAL)

PIN NUMBER

1

2

Gnd

3

4

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

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com