Sensors
MPL115A
Digital barometric pressure sensor
Overview
Freescale Semiconductor’s MPL115A series is
a simple barometer with digital output (I2C/SPI)
for cost-sensitive applications. A MEMS
pressure sensor with a conditioning IC provides
accurate pressure measurement. The MPL115A
is offered in a 5 x 3 x 1.2 mm LGA package for
space constrained applications. This surface
mount package is RoHS-compliant. The
MPL115A is ideal for battery and solar powered
applications with its low current consumption
at 1 μA in sleep mode and 5 μA in active mode.
The MPL115A enables altitude detection, weather
changes and will increase data capacity in
hard disk drives as well as providing absolute
pressure measurement for industrial equipment.
Target Applications
• Barometry(portableanddesk-top)
• Altimeter
• Weatherstations
• Harddiskdrives(HDD)
• Healthmonitoring
• Coolingfancontrol
• Deadreckoningassistance
• GPSnavigationassistance
• Woundmanagement
• Securityandsafety
• Ambientpressureswitch
• Leakdetection
• Vacuumequipment
MPL115A Block Diagrams
MPL115A1
SPI
Interface
MPL115A2
I2C
Interface
Diff
Amp
Temp
Sensor
MUX
ADC
Temperature
Pressure
Coefficient
Storage
DIN
GND
VDD
DOUT
SHDN
CS
CAP
SCLK
ADDR
ADDR
ADDR
ADDR
ADDR
SPI
Interface
Diff
Amp
Temp
Sensor
MUX
ADC
Temperature
Pressure
Coefficient
Storage
SDA
GND
VDD
RST
SHDN
CAP
SCL
ADDR
ADDR
ADDR
ADDR
ADDR
I
2
C
Interface
Learn More: For current information about Freescale
products and documentation, please visit
www.freescale.com/pressure.
Freescale and the Freescale logo are trademarks or registered trademarks of Freescale Semiconductor, Inc.
in the U.S. and other countries. All other product or service names are the property of their respective owners.
© Freescale Semiconductor, Inc. 2009
DocumentNumber:MPL115AFS
REV1
Selector Guide
Part Number
Operating
Supply
Voltage
Supply
Current
Pressure
Range Accuracy
Compensated
Temperature
Range
Digital
Interface Package
MPL115A1T1 2.4–5.5V 5 μA 50–115 kPa ± 1 kPa -20ºC–+85ºC SPI 8-pin LGA
MPL115A2T1 2.4–5.5V 5 μA 50–115 kPa ± 1 kPa -20ºC–+85ºC I2C8-pin LGA
Development Tools
Part Number Description
KITMPL115A1SPI Evaluation board that demonstrates the SPI communication protocol
KITMPL115A2I2C Evaluation board that demonstrates the I2C communication protocol
DEMOAPEXSENSOR The APEX (Altitude Pressure EXperimental) board showcases how pressure
sensors can be used to detect altitude at high resolution
Documentation
Document Number Title Description
MPL115A1 SPI Digital Barometer Data Sheet
MPL115A2 I2C Digital Barometer Data Sheet
AN3785 Using Digital Barometric Pressure
Sensors in Your Design
Application note for I2C and SPI interface board
implementation
AN3914 Modern Altimeter and Barometer
System Using the MPL115A
Application note that describes a modern
altimeter and barometer system
Features
• Digitaloutputoptions
MPL115A1 for SPI applications
MPL115A2 for I2C applications
• Low-profile3x5x1.2mmLGApackage
• Lowcurrentconsumption
Sleepmode:1μA
Activemode:5μAatonemeasurement
per second
• Temperatureandpressurecoefficients
available for temperature compensation
• Convenientpressureconversioninunitsof
kilopascals (kPa)
• 50to115kPaabsolutepressure
measurement range
• 1kPaaccuracy
• Operatingtemperaturerangefrom
-40ºC to +105ºC
• 2.4to5.5Voltpowersupply
Benefits
• Digitaloutputsimplifiessystemdesignwith
direct interface to microcontroller
• Smallpackageenablesdesignonspace
constrainedPCB
• Lowpowerconsumptionforbatteryand
solar powered applications
Freescale is a leading provider of pressure,
inertial and touch sensors and has offered
MEMS-based sensors for over 30 years.
The sensor ICs complement Freescale’s
broadportfolioofZigBee® technology,
microcontrollers, microprocessors, digital
signal processors, analog ICs and development
tools to offer system solutions to customers.
