KMX61-1021 Kionix

PART NUMBER: Digital Tri-axis Magnetometer/ KMX61-1021 Tri-axis Accelerometer Rev. 1.0 Specifications June 14 Product Description KMX61 is a 6 Degrees-of-Freedom inertial sensor system that 2 features 14-bit digital outputs accessed through I C communication. The KMX61 sensor consists of a tri-axial magnetometer plus a tri-axial accelerometer coupled with an ASIC. It is packaged in a 3x3x0.9mm Land Grid Array (LGA) package. The ASIC is realized in standard 0.18um CMOS technology and features flexible user programmable 2g/4g/8g full scale range for the accelerometer. Accelerometer and Magnetometer data can be accumulated in an internal 512 byte FIFO buffer and transmitted to the application processor. Acceleration sensing is based on the principle of a differential capacitance arising from acceleration-induced motion of the sense element, which utilizes common mode cancellation to decrease errors from process variation, temperature, and environmental stress. Capacitance changes are amplified and converted into digital signals which are processed by a dedicated digital signal processing unit. The digital signal processor applies filtering, bias and sensitivity adjustment, as well as temperature compensation. Magnetic sensing is based on the principle of magnetic impedance. The magnetic sensor detects very small magnetic fields by passing an electric pulse through a special electron spin aligned amorphous wire. Due to the high Curie temperature of the wire, the sensors thermal performance shows excellent stability. Noise performance is excellent with bias stability over temperature. Bias errors resulting from assembly can be trimmed digitally by the user. These sensors can accept supply voltages between 1.8V and 3.3V, and digital communication voltages between 1.8 and 3.3V. 36 Thornwood Dr. Ithaca, NY 14850 2014 Kionix All Rights Reserved tel: 607-257-1080 fax:607-257-1146 1.0 www.kionix.com - info kionix.com Page 1 of 51 Kionix Confidential PART NUMBER: Digital Tri-axis Magnetometer/ KMX61-1021 Tri-axis Accelerometer Rev. 1.0 Specifications June 14 Table of Contents PRODUCT DESCRIPTION .................................................................................................................................................................... 1 TABLE OF CONTENTS ......................................................................................................................................................................... 2 FUNCTIONAL DIAGRAM .................................................................................................................................................................... 4 PRODUCT SPECIFICATIONS ................................................................................................................................................................ 5 TABLE 1. MAGNETOMETER ........................................................................................................................................................................... 5 TABLE 2. ACCELEROMETER ........................................................................................................................................................................... 7 TABLE 3. ELECTRICAL ................................................................................................................................................................................... 9 KMX61 TRANSITION TIMING DIAGRAM ....................................................................................................................................................... 10 TABLE 4. TRANSITION TIMING ..................................................................................................................................................................... 10 KMX61 START UP TIME ............................................................................................................................................................................ 11 TABLE 5. START UP TIME ........................................................................................................................................................................... 11 2 KMX61 I C TIMING DIAGRAM ................................................................................................................................................................... 12 2 TABLE 6. I C TIMING (FAST MODE) ............................................................................................................................................................. 12 TABLE 7. ENVIRONMENTAL ......................................................................................................................................................................... 13 APPLICATION SCHEMATIC ........................................................................................................................................................................... 14 TABLE 8. KMX61 PIN DESCRIPTIONS ........................................................................................................................................................... 14 PACKAGE DIMENSIONS AND ORIENTATION: ................................................................................................................................................... 15 DIMENSIONS............................................................................................................................................................................................ 15 ORIENTATION .......................................................................................................................................................................................... 16 BOARD LAYOUT ........................................................................................................................................................................................ 16 KMX61 DIGITAL INTERFACE ............................................................................................................................................................ 17 2 I C SERIAL INTERFACE ................................................................................................................................................................................ 17 2 I C OPERATION ........................................................................................................................................................................................ 18 WRITING TO A KMX61 8-BIT REGISTER ........................................................................................................................................................ 19 READING FROM A KMX61 8-BIT REGISTER.................................................................................................................................................... 19 DATA TRANSFER SEQUENCES ...................................................................................................................................................................... 20 HS-MODE ............................................................................................................................................................................................... 21 POWER MODES ............................................................................................................................................................................... 22 OFF MODE .............................................................................................................................................................................................. 22 INITIAL STARTUP ....................................................................................................................................................................................... 22 STAND-BY MODE ...................................................................................................................................................................................... 23 SLEEP MODE ............................................................................................................................................................................................ 23 ENABLE MODE ......................................................................................................................................................................................... 23 KMX61 EMBEDDED REGISTERS ....................................................................................................................................................... 24 MAGNETOMETER OUTPUTS ........................................................................................................................................................................ 26 36 Thornwood Dr. Ithaca, NY 14850 2014 Kionix All Rights Reserved tel: 607-257-1080 fax:607-257-1146 1.0 www.kionix.com - info kionix.com Page 2 of 51 Kionix Confidential