DEV-13630 SparkFun

Freescale Semiconductor Document Number: MPL3115A2 Data Sheet: Advance Information Rev 2.2, 07/2012 An Energy Efficient Solution by Freescale 2 I C Precision Altimeter MPL3115A2 2 The MPL3115A2 employs a MEMS pressure sensor with an I C interface to 50 to 110 kPa provide accurate Pressure/Altitude and Temperature data. The sensor outputs are digitized by a high resolution 24-bit ADC. Internal processing removes compensation tasks from the host MCU system. Multiple user-programmable, power saving, interrupt and autonomous data acquisition modes are available, including programmed acquisition cycle timing, and poll-only modes. Typical active supply current is 40 A per measurement-second for a stable 30 cm output resolution. Pressure output can be resolved with output in fractions of a Pascal, and Altitude can be resolved in fractions of a meter. The MPL3115A2 is offered in a 5 mm by 3 mm by 1.1 mm LGA package and specified for operation from -40 C to 85 C. Package is surface mount with a stainless steel lid and is RoHS compliant. Features LGA PACKAGE 1.95V to 3.6V Supply Voltage, internally regulated by LDO 5.0 mm by 3.0 mm by 1.1 mm 1.6V to 3.6V Digital Interface Supply Voltage Fully Compensated internally Direct Reading, Compensated Top View Pressure: 20-bit measurement (Pascals) Altitude: 20-bit measurement (meters) V 1 8 SCL DD Temperature: 12-bit measurement (degrees Celsius) Programmable Events 2 7 SDA CAP Autonomous Data Acquisition 3 6 INT1 GND Resolution down to 1 ft. / 30 cm 32 Sample FIFO V 4 5 INT2 DDIO Ability to log data up to 12 days using the FIFO 1 second to 9 hour data acquisition rate 2 I C digital output interface (operates up to 400 kHz) Pin Connections Application Examples High Accuracy Altimetry Smartphones/Tablets Personal Electronics Altimetry GPS Dead Reckoning GPS Enhancement for Emergency Services Map Assist, Navigation Weather Station Equipment ORDERING INFORMATION of Ports Pressure Type Digital Device Name Package Options Case No. Interface None Single Dual Gauge Differential Absolute MPL3115A2 Tray 2153 MPL3115A2R1 Tape & Reel (1000) 2153 This document contains information on a new product. Specifications and information herein are subject to change without notice. 2011-2012 Freescale Semiconductor, Inc. All rights reserved.Contents 1 Block Diagram and Pin Descriptions 3 2 Mechanical and Electrical Specifications 5 2.1 Mechanical Characteristics . 5 3 Electrical Characteristics . 6 2 3.1 I C Interface Characteristics 7 3.2 Absolute Maximum Ratings 9 4 Quick Start Quick Setup Guide 10 5 Terminology . 14 5.1 Resolution . 14 5.2 Accuracy 14 5.3 Pressure/Altitude 14 5.4 Power Modes of Operation 15 6 Functionality . 15 6.1 Factory Calibration 16 6.2 Barometer/Altimeter Function 16 6.3 Temperature Function 16 6.4 Autonomous Data Acquisition 16 6.5 FIFO 16 6.6 External Interrupts . 16 6.7 Pressure/Altitude and Temperature Delta . 17 6.8 Min/Max Data Value Storage 17 6.9 Digital Interface 17 7 Register Descriptions 19 7.1 Sensor Status 21 7.2 Device ID . 25 7.3 FIFO Setup 25 7.4 Time Delay Register 27 7.5 System Mode Register . 27 7.6 System Interrupt Status 27 7.7 Sensor Data . 28 7.8 Barometric Pressure Input 29 7.9 Pressure/Altitude Target 29 7.10 Temperature Target . 29 7.11 Pressure/Altitude Window . 30 7.12 Temperature Window 30 7.13 Minimum Pressure 30 7.14 Maximum Pressure 31 7.15 Minimum Temperature . 31 7.16 Maximum Temperature . 32 7.17 Control Registers . 32 7.18 Offset Correction 37 8 Soldering/Landing Pad Information 39 9 Tape and Reel Specifications . 42 Related Documentation The MPL3115A2 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: