Data Sheet

Freescale Semiconductor
Data Sheet: Technical Data
Document Number: MPXM2051G
Rev. 3.0, 11/2015
MPXM2051G, 0 to 50 kPa, Gauge
Compensated Pressure Sensors
MPXM2051G
The MPXM2051G device is a silicon piezoresistive pressure sensor 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.
MPAK package
Features
•
Temperature compensated over 0 °C to +85 °C
•
Available in easy-to-use tape and reel
•
Ratiometric to supply voltage
•
Gauge ported
MPXM2051GS/GST1
Case 98ARH99087A
Typical applications
•
Pump/motor controllers
•
Robotics
•
Level indicators
•
Medical diagnostics
•
Pressure switching
•
Top view
Non-invasive blood pressure measurement
'1&
9287
96
9287
*1'
Pinout
Ordering information
# of Ports
Pressure type
Device name
Shipping
Package
Absolute
Device
marking
MPXM2051GS
Rail
98ARH99087A
•
•
MPXM2051GS
MPXM2051GST1
Tape and reel
98ARH99087A
•
•
MPXM2051GS
None
Single
Dual
Gauge
Differential
Freescale reserves the right to change the detail specifications as may be required to permit
improvements in the design of its products.
© 2005, 2009, 2015 Freescale Semiconductor, Inc. All rights reserved.
Contents
1
2
3
4
5
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical and Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Voltage output versus applied differential pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On-chip Temperature Compensation and Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Package dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3
3
4
4
4
4
5
6
7
7
9
Related Documentation
The MPXM2051G device features and operations are described in a variety of reference manuals, user guides, and application
notes. To find the most-current versions of these documents:
1.
Go to the Freescale homepage at:
http://www.freescale.com/
2.
3.
In the Keyword search box at the top of the page, enter the device number MPXM2051G.
In the Refine Your Result pane on the left, click on the Documentation link.
MPXM2051G
2
Sensors
Freescale Semiconductor, Inc.
1
General Description
1.1
Block diagram
Figure 1 shows a block diagram of the internal circuitry integrated on a pressure sensor chip.
VS
Thin Film
Temperature
Compensation
and
Calibration
Transducer
Sensing
Element
VOUT+
VOUT-
GND
Figure 1. Integrated pressure sensor block diagram
1.2
Pinout
'1&
9287
96
9287
*1'
Figure 2. Device pinout (top view)
Table 1. Pin functions
Pin
Name
Function
1
GND
2
VOUT+
Output voltage
3
VS
Voltage supply
4
VOUT-
Output voltage
5
DNC
Do not connect to external circuitry or ground.
Ground
MPXM2051G
Sensors
Freescale Semiconductor, Inc.
3
2
Mechanical and Electrical Specifications
2.1
Maximum ratings
Table 2. Maximum ratings(1)
Rating
Symbol
Value
Unit
Pmax
200
kPa
Storage Temperature
Tstg
-40 to +125
°C
Operating Temperature
TA
-40 to +125
°C
Maximum Pressure
1.Exposure beyond the specified limits may cause permanent damage or degradation to the device.
2.2
Operating characteristics
Table 3. Operating characteristics (VS = 10 Vdc, TA = 25°C.)
Symbol
Min
Typ
Max
Pressure Range(1)
Characteristic
POP
0
—
50
kPa
Supply Voltage(2)
VS
—
10
16
Vdc
mAdc
Supply Current
Full Scale Span(3)
Offset(4)
Unit
Io
—
6.0
—
VFSS
38.5
40
41.5
mV
Voff
-1.0
—
1.0
mV
ΔV/ΔP
—
0.8
—
mV/kPa
Linearity
—
-0.3
—
0.3
%VFSS
Pressure Hysteresis(0 to 50 kPa)
—
—
±0.1
—
%VFSS
Temperature Hysteresis (-40°C to +125°C)
—
—
±0.5
—
%VFSS
TCVFSS
-1.0
—
1.0
%VFSS
Sensitivity
Temperature Effect on Full Scale Span
Temperature Effect on Offset
TCVoff
-1.0
—
1.0
mV
Input Impedance
Zin
1000
—
2500
Ω
Output Impedance
Zout
1400
—
3000
Ω
(5)
tR
—
1.0
—
ms
Warm-Up
—
—
20
—
ms
Offset Stability(6)
—
—
±0.5
—
%VFSS
Response Time
(10% to 90%)
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 (VFSS) is defined as the algebraic difference between the output voltage at full rated pressure and the output voltage at the
minimum rated pressure.
4.Offset (Voff) is defined as the output voltage at the minimum rated pressure.
5.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.
6.Offset stability is the product's output deviation when subjected to 1000 hours of Pulsed Pressure, Temperature Cycling with Bias Test.
2.3
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 relative to
the vacuum side. Similarly, output voltage increases as increasing vacuum is applied to the vacuum side relative to the pressure
side.
MPXM2051G
4
Sensors
Freescale Semiconductor, Inc.
2.4
Linearity
Linearity refers to how well a transducer's output follows the equation: VOUT = VOFF + sensitivity x P over the operating pressure
range. There are two basic methods for calculating nonlinearity: (1) end point straight line fit (see Figure 3) 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. The specified pressure sensor linearities are based on the end point straight line method
measured at the midrange pressure.
Least
Square
Deviation
Least Squares Fit
Relative Voltage Output
Exaggerated
Performance
Curve
Straight Line
Deviation
End Point
Straight Line Fit
OFFSET
0
50
100
Pressure (% Full scale)
Figure 3. Linearity specification comparison
MPXM2051G
Sensors
Freescale Semiconductor, Inc.
5
3
On-chip Temperature Compensation and Calibration
Figure 4 shows the minimum, maximum and typical output characteristics of the MPXM2051G series at 25 °C. The output is
directly proportional to the differential pressure and is essentially a straight line.
A silicone gel isolates the die surface and wire bonds from the environment, while allowing the pressure signal to be transmitted
to the silicon diaphragm.
40
VS = 10 Vdc
TA = 25°C
Output (mVdc)
35
TYP
30
25
20
SPAN
RANGE
(TYP)
MAX
15
10
MIN
5
kPa
PSI
0
-5
0
12.5
1.8
25
3.6
37.5
5.4
50
7.25
OFFSET
(TYP)
Figure 4. Output versus pressure differential
MPXM2051G
6
Sensors
Freescale Semiconductor, Inc.
4
Package Information
4.1
Package dimensions
This drawing is located at http://cache.freescale.com/files/shared/doc/package_info/98ARH99087A.pdf.
PIN 4
PIN 1
Case 98ARH99087A, 5-lead M-PAC
MPXM2051G
Sensors
Freescale Semiconductor, Inc.
7
Case 98ARH99087A, 5-lead M-PAC
MPXM2051G
8
Sensors
Freescale Semiconductor, Inc.
5
Revision History
Table 4. Revision history
Revision
number
Revision
date
3.0
11/2015
Description of changes
• Updated format.
MPXM2051G
Sensors
Freescale Semiconductor, Inc.
9
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© 2005, 2009, 2015 Freescale Semiconductor, Inc.
Document Number: MPXM2051G
Rev. 3.0
11/2015
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