Freescale Pressure Sensors
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Transcript of Freescale Pressure Sensors
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Freescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
Freescale Pressure Sensors
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Pressure Sensors Blood Pressure
Freescale Pressure Sensors
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
Blood Pressure Barometer/Altimeter Engine Control HVAC Applications Respiratory Applications Drug Delivery for Inhalers Consumer Appliance Industrial Equipment
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What are Sensors?
A sensor is a device that detects either a real world condition, or a change in a physical quantity, and converts that change into a useful input signal for a decision making center.
Some examples of physical quantities that our sensors measure include temperature, pressure, flow rate, acceleration, vibration, tilt, and touch.
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
Data Processing, Control, and ConnectivitySensor Input
Actuatoror
Output
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Diaphragm
Ion-implanted Strain
Signal Conditioning
Circuit
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
StrainGauge
Single Chip Integrated Silicon Pressure Sensor
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Pressure Sensor Cross Section
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
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DifferentialP1
P2
Gauge
P1
Types of Measurements
The bottom (P2) side is exposed to the atmosphere and P1 is where
The difference in pressure between two points is measured where pressure is applied to both sides of sensor.
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
Gauge
Absolute VacuumP1
P2 = ATM
the atmosphere and P1 is where pressure is applied.
Constraint Wafer
Pressure is applied to the top of the die while the bottom of the die is a vacuum sealed reference.
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Barometer
Altimeter
Internal Tire Pressure
MAP/BAP
Each needs a pressure measurement that is compared to a fixed reference pressure (vacuum).
Sensor is in an enclosed environment with pressure medium
Each needs a measurement that compares the barometric pressure in its surroundings to the
measurement pressure.
Blood Pressure Monitor
Water Level
Exhaust Gas Recirculation
ABSOLU
TEG
AGE
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
measurement pressure.
In general, anything below 10 psi (70 kPa).Exhaust Gas Recirculation
Air Mattress
Each requires a comparison of the pressure between two ports
of the sensor.
Flow measurement
HVAC Applications
Air Flow
Filter Pressure
Pressure Drop
GAG
ED
IFFEREN
TIAL
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VFS O
Span
S e n s it iv it y
Y = mX + B
Vout
Output Voltage
Understand our Data Sheet
Offset Sensor output at zero pressure
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
Full Scale Pressure
Vo f f
S e n s it iv it y
Zero Pressure
Pressure
Span Sensor output at full scale pressure minus the offset
Sensitivity - Slope of the line (m), mV/kPa
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Temperaturecompensation
Amplification
Amplification
MCU
MCU
Output
OutputMPX10DP
UN-COMPENSATED
Pressure Sensor Levels of IntegrationPressure Sensor Levels of IntegrationPRODUCT OFFERINGS
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
MPXV5004GINTEGRATED PRESSURE SENSOR (IPS)
MPXM2010GSCOMPENSATED MCU Output
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Level of Integration
Temperaturecompensation
Amplification
Amplification
MCU
MCU
Output
OutputMPX10DP
UN-COMPENSATED
Pressure Sensor Levels of IntegrationPressure Sensor Levels of Integration
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
MPXV5004GINTEGRATED PRESSURE SENSOR (IPS)
MPXM2010GSCOMPENSATED MCU Output
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Uncompensated:
Temperature Compensated& Calibrated:
Design Advantages Design Considerations
High sensitivity Lowest cost Provides positive and negative
pressure measurement
Device to device variation Temp-compensation circuitry required Amplification circuitry required
Minimal device to devicevariations (interchangeability)
Temperature compensationincluded on chip.
Lowest sensitivity than due tocompensation features
Priced higher than uncomp
PRODUCT OFFERINGS
AUTO ZERO +
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
Integrated:
included on chip. Provides positive and negative
pressure measurement
PLUG N PLAY Connect directly to MCU Amplified, calibrated for
span & offset. (Interchangeability) Temperature compensation
included on-chip
Priced higher than uncomp Amplification circuitry required
Priced higher than uncomp & compdevices.
Lower piece part count
AUTO ZERO +
AUTO ZERO +
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MPAK
MPAK Axial Port
SuperSmall
OutlinePackage(SSOP) Case
423A
Package Options
Case1317
Tire Pressure Monitor
Axial Port
MedicalChip Pak
Unibody
BASIC ELEMENT
GAUGE PORT
DualPort
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.
Case482
Vacuum Port
SmallOutline
Package(SOP) Side
PortDualPort
ThroughHole
Axial PortThrough
Hole 482BAxial Port
ThroughHole
Axial Port
ThroughHole
Axial Port
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Freescale Pressure sensor
MAP/BAP (Manifold/Barometric Absolute Pressure)
Placement in end product: engines, 2-stroke scooters.
Modules produced by Customer
TMFreescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. Freescale Semiconductor, Inc. 2006.