PPXV50GC7U [MOTOROLA]

GAGE, PEIZORESISTIVE PRESSURE SENSOR, 0-7.25Psi, 0.25%, 20-80mV, RECTANGULAR, THROUGH HOLE MOUNT, SOP-8;


型号：	PPXV50GC7U
厂家：	MOTOROLA
描述：	GAGE, PEIZORESISTIVE PRESSURE SENSOR, 0-7.25Psi, 0.25%, 20-80mV, RECTANGULAR, THROUGH HOLE MOUNT, SOP-8 传感器换能器
文件：	总4页 (文件大小：174K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SEMICONDUCTOR TECHNICAL DATA

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.

0 to 50 kPa (0–7.25 psi)

60 mV FULL SCALE SPAN

(TYPICAL)

SMALL OUTLINE

Features

PACKAGE

•

Low Cost

Patented Silicon Shear Stress Strain Gauge Design

Ratiometric to Supply Voltage

Easy to Use Chip Carrier Package Options

60 mV Span (Typ)

BASIC CHIP

CARRIER ELEMENT

CASE 344–15, STYLE 1

Differential and Gauge Options

±0.25% (Max) Linearity

PPXV50GC6U

CASE 482A–01

Application Examples

•

Air Movement Control

Environmental Control Systems

Level Indicators

Leak Detection

Medical Instrumentation

Industrial Controls

PPXV50GC7U

CASE 482C–03

DIFFERENTIAL

PORT OPTION

CASE 344C–01, STYLE 1

Pneumatic Control Systems

Robotics

PIN NUMBER

Figure 1 shows a schematic of the internal circuitry

NOTE: Pin 1 is the notched pin.

Gnd

N/C

on the stand–alone pressure sensor chip.

PIN NUMBER

+ V

out

Gnd

–V

out

+ V

out

–V

out

X–ducer

– V

out

GND

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 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).

REV 7

Motorola Sensor Device Data

3–25

MAXIMUM RATINGS

Rating

Symbol

Value

200

Unit

kPa

°C

(8)

Overpressure (P1 > P2)

max

(8)

Burst Pressure (P1 > P2)

burst

500

Storage Temperature

Operating Temperature

stg

–40 to +125

°C

OPERATING CHARACTERISTICS (V = 3.0 Vdc, T = 25°C unless otherwise noted, P1 > P2)

Characteristic

Symbol

Min

Typ

—

Max

Unit

kPa

Vdc

mAdc

(1)

Pressure Range

(2)

Supply Voltage

Supply Current

Full Scale Span

—

3.0

6.0

—

(3)

FSS

(4)

Offset

off

Sensitivity

(5)

∆V/∆P

—

1.2

—

mV/kPa

Linearity

Pressure Hysteresis (0 to 50 kPa)

(5)

–0.25

—

0.25

—

FSS

(5)

—

± 0.1

± 0.5

—

Temperature Hysteresis (– 40°C to +125°C)

—

(5)

Temperature Coefficient of Full Scale Span

(5)

TCV

FSS

–0.22

—

–0.16

—

/°C

µV/°C

FSS

Temperature Coefficient of Offset

TCV

off

± 15

—

(5)

Temperature Coefficient of Resistance

Input Impedance

TCR

0.28

400

750

—

0.34

550

1800

—

%Z /°C

—

Ω

Output Impedance

out

—

(6)

Response Time (10% to 90%)

1.0

Warm–Up

—

(9)

Offset Stability

—

± 0.5

—

FSS

MECHANICAL CHARACTERISTICS

Characteristic

Symbol

Min

—

Typ

2.0

—

Max

—

Unit

Weight (Basic Element Case 344–15)

—

Grams

kPa

(7)

Common Mode Line Pressure

—

690

NOTES:

1. 1.0 kPa (kiloPascal) equals 0.145 psi.

2. Device is ratiometric within this specified excitation range. Operating the device above the specified excitation range may induce additional

error due to device self–heating.

3. Full Scale Span (V

) is defined as the algebraic difference between the output voltage at full rated pressure and the output voltage at the

minimum rated pressure.

FSS

4. Offset (V ) is defined as the output voltage at the minimum rated pressure.

off

5. Accuracy (error budget) consists of the following:

•

Linearity:

Output deviation from a straight line relationship with pressure, using end point method, over the specified

pressure range.

•

Temperature Hysteresis: Output deviation at any temperature within the operating temperature range, after the temperature is

cycled to and from the minimum or maximum operating temperature points, with zero differential pressure

applied.

•

Pressure Hysteresis:

Output deviation at any pressure within the specified range, when this pressure is cycled to and from the

minimum or maximum rated pressure, at 25°C.

•

TcSpan:

TcOffset:

Output deviation at full rated pressure over the temperature range of 0 to 85°C, relative to 25°C.

Output deviation with minimum rated pressure applied, over the temperature range of 0 to 85°C, relative

to 25°C.

•

TCR:

deviation with minimum rated pressure applied, over the temperature range of –40°C to +125°C,

relative to 25°C.

6. Response Time is defined as the time for the incremental change in the output to go from 10% to 90% of its final value when subjected to

a specified step change in pressure.

7. Common mode pressures beyond specified may result in leakage at the case–to–lead interface.

8. Exposure beyond these limits may cause permanent damage or degradation to the device.

9. Offset stability is the product’s output deviation when subjected to 1000 hours of Pulsed Pressure, Temperature Cycling with Bias Test.

3–26

Motorola Sensor Device Data

TEMPERATURE COMPENSATION

Figure 2 shows the typical output characteristics of the

MPX50 series over temperature.

or by designing your system using the MPX2050 series

sensors.

Several approaches to external temperature compensa-

tion over both –40 to +125°C and 0 to +80°C ranges are

presented in Motorola Applications Note AN840.

The X–ducer piezoresistive pressure sensor element is a

semiconductor device which gives an electrical output signal

proportional to the pressure applied to the device. This de-

vice uses a unique transverse voltage diffused semiconduc-

tor strain gauge which is sensitive to stresses produced in a

thin silicon diaphragm by the applied pressure.

Because this strain gauge is an integral part of the silicon

diaphragm, there are no temperature effects due to differ-

ences in the thermal expansion of the strain gauge and the

diaphragm, as are often encountered in bonded strain gauge

pressure sensors. However, the properties of the strain

gauge itself are temperature dependent, requiring that the

device be temperature compensated if it is to be used over

an extensive temperature range.

LINEARITY

Linearity refers to how well a transducer’s output follows

the equation: V

= V + sensitivity x P over the operating

out

off

pressure range (see Figure 3). There are two basic methods

for calculating nonlinearity: (1) end point straight line fit or (2)

a least squares best line fit. While a least squares fit gives

the “best case” linearity error (lower numerical value), the

calculations required are burdensome.

Conversely, an end point fit will give the “worst case” error

(often more desirable in error budget calculations) and the

calculations are more straightforward for the user. Motorola’s

specified pressure sensor linearities are based on the end

point straight line method measured at the midrange

pressure.

Temperature compensation and offset calibration can be

achieved rather simply with additional resistive components,

100

LINEARITY

–40°C

MPX50

+25°C

V = 3 Vdc

ACTUAL

P1 > P2

SPAN

RANGE

(TYP)

+125°C

SPAN

FSS

)

THEORETICAL

PSI

kPa

OFFSET

(TYP)

OFFSET

)

OFF

MAX

PRESSURE DIFFERENTIAL

PRESSURE (kPA)

Figure 2. Output versus Pressure Differential

Figure 3. Linearity Specification Comparison

SILICONE

DIE COAT

STAINLESS STEEL

METAL COVER

EPOXY

DIE

WIRE BOND

LEAD FRAME

CASE

RTV DIE

BOND

Figure 4. Cross–Sectional Diagram (not to scale)

Figure 4 illustrates the differential or gauge configuration

in the basic chip carrier (Case 344–15). A silicone gel iso-

lates the die surface and wire bonds from the environment,

while allowing the pressure signal to be transmitted to the sil-

icon diaphragm.

tics and internal reliability and qualification tests are based

on use of dry air as the pressure media. Media other than dry

air may have adverse effects on sensor performance and

long term reliability. Contact the factory for information re-

garding media compatibility in your application.

The MPX50 series pressure sensor operating characteris-

Motorola Sensor Device Data

3–27

PRESSURE (P1)/VACUUM (P2) SIDE IDENTIFICATION TABLE

Motorola designates the two sides of the pressure sensor

pressure sensor is designed to operate with positive differen-

as the Pressure (P1) side and the Vacuum (P2) side. The

Pressure (P1) side is the side containing silicone gel which

isolates the die from the environment. The Motorola MPX

tial pressure applied, P1 > P2.

The Pressure (P1) side may be identified by using the

table below:

Part Number

Case Type

344–15

Pressure (P1) Side Identifier

Stainless Steel Cap

MPX50D

MPX50DP

MPX50GP

344C–01

344B–01

344D–01

344E–01

344A–01

344F–01

344G–01

Side with Part Marking

Side with Port Attached

Stainless Steel Cap

MPX50GVP

MPX50GS

Side with Port Attached

Stainless Steel Cap

MPX50GVS

MPX50GSX

MPX50GVSX

Side with Port Attached

Stainless Steel Cap

ORDERING INFORMATION

MPX50 series pressure sensors are available in differential and gauge configurations. Devices are available with basic

element package or with pressure port fittings which provide printed circuit board mounting ease and barbed hose pressure

connections.

MPX Series

Device Type

Basic Element

Ported Elements

Options

Case Type

Case 344–15

Order Number

MPX50D

Device Marking

MPX50D

Differential

Gauge

Case 344C–01

Case 344B–01

Case 344D–01

Case 344E–01

Case 344A–01

Case 344F–01

Case 344G–01

MPX50DP

MPX50GP

MPX50GVP

MPX50D

MPX50GP

MPX50GVP

MPX50GS

MPX50GVS

MPX50GSX

MPX50GVSX

Gauge Vacuum

Gauge Stovepipe

Gauge Vacuum Stovepipe

Gauge Axial

Gauge Vacuum Axial

ORDERING INFORMATION — SMALL OUTLINE PACKAGE

Small outline package is currently available as a prototype status device. Please contact factory for more information or

mechanical samples.

Device

PPXV50GC6U

PPXV50GC7U

Case No.

482A–01

482C–03

Packing Options

Rails

Marking

PPXV50G

Rails

PPXV50G

3–28

Motorola Sensor Device Data

PPXV50GC7U [MOTOROLA]

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