STEVAL-MKI001V1

STEVAL-MKI001V1 MEMS analog output evaluation board based on LIS3L02AS4 Data Brief Features ■ 2.4 V to 3.6 V single supply operation ■ Low power consumption ■ ±2 g / ±6 g user selectable full-scale ■ 0.5 mg resolution over 100 Hz bandwidth ■ Embedded self-test and power down ■ Output voltage, offset and sensitivity ratiometric to the supply voltage ■ High shock survivability ■ Lead-free and ECOPACK™ compatible Applications ■ Mobile terminals ■ Gaming and virtual reality input devices ■ Free-fall detection for data protection ■ Antitheft systems and inertial navigation ■ Appliance and robotics STEVAL-MKI001V1 Description The STEVAL-MKI001V1 is an evaluation kit designed to provide the user with a platform for evaluating the LIS3L02AS4 MEMS accelerometer in the SO24 package with analog output. It implements a typical application composed of the LIS3L02AS4 accelerometer and the TS924 rail-torail precision buffer. The supply voltage is generated by an LE33 voltage regulator, which ensures the correct power required by the LIS3L02AS4 device. All parts on the STEVAL-MKI001V1 evaluation kit board are STMicroelectronics components. October 2007 Rev 2 For further information contact your local STMicroelectronics sales office. 1/5 www.st.com 5 General circuit description 1 STEVAL-MKI001V1 General circuit description The sensing element, capable of detecting the acceleration, is manufactured using a dedicated process developed by ST to produce inertial sensors and actuators in silicon. The IC interface is manufactured using a standard CMOS process that allows high level of integration to design a dedicated circuit which is trimmed to better match the sensing element characteristics. The LIS3L02AS4 has a user selectable full scale of ±2g, ±6g and it is capable of measuring accelerations over a bandwidth of 1.5 KHz for all axes. The device bandwidth may be reduced by using external capacitances. A self-test capability allows to check the mechanical and electrical signal path of the sensor. The LIS3L02AS4 is available in plastic SMD package and it is specified over an extended temperature range of -40°C to +85°C. 2/5 Board schematic 2 Board schematic STEVAL-MKI001V1 Scheme Figure 1. J2 1 2 psr VDD C1 2.2uF U1 LE33 U2 1 2 3 4 LE33 8 7 6 5 Full Scale Power Down Self Test 8 7 6 5 LE33 linear voltage regulator case: SO8 or TO92 1 2 3 4 1 2 3 1 2 3 J7 1 2 J5 1 2 3 J6 C2 100nF VDD VDD J1 1 2 Cx 1n5F VoutZ Cz 1n5F VoutX VoutY C4 100nF Power_Supply + VDD Cy 1n5F C3 10uF R1 10K VDD 1 2 3 4 5 6 7 8 9 10 11 12 U4 NC NC NC NC NC GND VDD Vy ST Vx PD Vz VoutX VoutY LIS3L02AS4 VDD NC NC NC NC NC NC Rsvd Rsvd Rsvd Rsvd Rsvd FS VX VY 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VZ TS924 rail to rail Low noise Quad operational amplifier U3 VOUT1 VOUT4 V-1 V-4 V+1 V+4 VCC GND V+2 V+3 V-2 V-3 VOUT2 VOUT3 TS924 VDD VX VY VZ VoutX VoutY VoutZ J3 1 2 3 1 2 3 J4 VoutZ Buffered Output Sensor Output 3/5 Revision history 3 STEVAL-MKI001V1 Revision history Table 1. 4/5 Document revision history Date Revision Changes 21-Aug-2007 1 Initial release 16-Oct-2007 2 Content reworked to improve readability, no technical changes STEVAL-MKI001V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2007 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 5/5