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[原创] ST LSM303AGR超小型高性能电子罗盘3D评估方案

关键词:MEMS 电子罗盘 eCompass 传感器 LSM303AGR

时间:2016-05-18 10:21:54       作者:ST       来源:中电网

ST公司的LSM303AGR是超小型高性能系统封装电子罗盘eCompass模块,集成了3D数字线性加速度传感器和3D数字磁传感器,以及支持标准, 快模式, 快模式+和高速(100 kHz, 400 kHz,1 MHz和3.4 MHz) I2C串行接口和SPI串行标准接口.主要用在倾斜补偿指南针,地图旋转,位置检测,运动激活和自由落体检测.本文介绍了LSM303AGR主要特性,框图和电连接图,以及LSM303AGR适配板STEVAL-MKI172V1主要特性,电路图和材料清单.

The LSM303AGR is an ultra-low-power highperformancesystem-in-package featuring a 3Ddigital linear acceleration sensor and a 3D digitalmagnetic sensor.

The LSM303AGR has linear acceleration fullscales of ±2g/±4g/±8g/16g and a magnetic fielddynamic range of ±50 gauss.

The LSM303AGR includes an I2C serial businterface that supports standard, fast mode, fastmode plus, and high-speed (100 kHz, 400 kHz,1 MHz, and 3.4 MHz) and an SPI serial standardinterface.

The system can be configured to generate aninterrupt signal for free-fall, motion detection andmagnetic field detection.

The magnetic and accelerometer blocks can beenabled or put into power-down mode separately.

The LSM303AGR is available in a plastic landgrid array package (LGA) and is guaranteed tooperate over an extended temperature rangefrom -40℃ to +85℃.

LSM303AGR主要特性:

3 magnetic field channels and 3 accelerationchannels
±50 gauss magnetic dynamic range
±2/±4/±8/16 g selectable acceleration fullscales
16-bit data output
SPI/I2C serial interfaces
Analog supply voltage 1.71 V to 3.6 V
Selectable power mode/resolution foraccelerometer and magnetometer
Single measurement mode for magnetometer
Programmable interrupt generators for freefall,motion detection and magnetic field
detection
Embedded self-test
Embedded temperature sensor
Embedded FIFO
ECOPACK®, RoHS and “Green”compliant

LSM303AGR应用:

Tilt-compensated compasses
Map rotation
Position detection
Motion-activated functions
Free-fall detection

图1.LSM303AGR框图

图2. LSM303AGR电连接图

标准DIL 24插座LSM303AGR适配板STEVAL-MKI172V1

The STEVAL-MKI172V1 is an adapter board designed to facilitate the evaluation of MEMS devices in the LSM303AGR product family. The board offers an effective solution for fast system prototyping and device evaluation directly within the user’s own application.

The STEVAL-MKI172V1 can be plugged into a standard DIL 24 socket. The adapter provides the complete LSM303AGR pinout and comes ready-to-use with the required decoupling capacitors on the VDD power supply line.

This adapter is supported by the STEVAL-MKI109V2 motherboard which includes a high performance 32-bit microcontroller functioning as a bridge between the sensor and a PC, on which it is possible to use the downloadable graphical user interface (Unico GUI), or dedicated software routines for customized applications.

LSM303AGR适配板STEVAL-MKI172V1主要特性:

Complete LSM303AGR pinout for a standard DIL 24 socket
Fully compatible with the STEVAL-MKI109V2 motherboard
RoHS compliant

图3.LSM303AGR适配板STEVAL-MKI172V1外形图

图4.LSM303AGR适配板STEVAL-MKI172V1电路图
LSM303AGR适配板STEVAL-MKI172V1材料清单:

详情请见:
http://www2.st.com/content/ccc/resource/technical/document/datasheet/74/c4/19
/54/62/c5/46/13/DM00177685.pdf/files/DM00177685.pdf/jcr:content/translations/en.DM00177685.pdf

http://www2.st.com/content/ccc/resource/technical/document/data_brief/group0
/17/2c/0e/05/c7/0c/41/54/DM00282297/files/DM00282297.pdf/jcr:content/translations/en.DM00282297.pdf

以及http://www2.st.com/content/ccc/resource/technical/document/application_note/group0/6d/cd/b8/e0/44
/98/4e/81/DM00265383/files/DM00265383.pdf/jcr:content/translations/en.DM00265383.pdf

en.DM00177685.pdf
en.DM00265383.pdf
en.DM00282297.pdf

 

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