MPX7050D Просмотр технического описания (PDF) - Motorola => Freescale

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MPX7050D

50 kPa High Zin, On-Chip Temperature Compensated & Calibrated Silicon Pressure Sensor

Motorola => Freescale 

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

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The new MPX7050 series pressure sensor incorporates all the innovative features of

Motorola’s MPX2000 series family including the patented, single piezoresistive strain

gauge (X–ducer) and on–chip temperature compensation and calibration. In addition, the

MPX7050 series has a high input impedance of typically 10 kΩ for those portable, low

power and battery–operated applications. This device is suitable for those systems in

which users must have a dependable, accurate pressure sensor that will not consume

significant power. The MPX7050 series device is a logical and economical choice for

applications such as portable medical instrumentation, and remote sensing systems with

4 – 20 mAmp transmission.

Features

• Temperature Compensated Over 0°C to +85°C

• Unique Silicon Shear Stress Strain Gauge

• Easy to Use Chip Carrier Package Options

• Available in Differential and Gauge Configurations

• Ratiometric to Supply Voltage

• ± 0.25% Linearity

Application Examples

• Portable Medical Instrumentation

• Remote Sensing Systems

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

sensor chip.

VS

3

HIGH

Zin

X–ducer

SENSING

ELEMENT

THIN FILM

TEMPERATURE

COMPENSATION

AND

CALIBRATION

CIRCUITRY

2

Vout+

4 Vout–

1

GND

Figure 1. Temperature Compensated 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 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.

REV 3

©MMoottoororolal,aInSc.e1n9s97or Device Data

MSPEXR7I0E5S0

0 to 50 kPa (0 to 7.25 psi)

40 mV FULL SCALE SPAN

(TYPICAL)

BASIC CHIP

CARRIER ELEMENT

CASE 344–15, STYLE 1

DIFFERENTIAL

PORT OPTION

CASE 344C–01, STYLE 1

NOTE: Pin 1 is the notched pin.

PIN NUMBER

1

Gnd

3

VS

2

+Vout

4 –Vout

1

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