PART NUMBER: 2g / 4g / 8g Tri-axis Digital KX023-1025 Rev. 12.0 Accelerometer Specifications 5-Apr-16 Product Description The KX023 is a tri-axis 2g, 4g or 8g silicon micromachined accelerometer with integrated 256 byte buffer, orientation, tap/double tap, and activity detecting algorithms. The sense element is fabricated using Kionixs proprietary plasma micromachining process technology. Acceleration sensing is based on the principle of a differential capacitance arising from acceleration-induced motion of the sense element, which further utilizes common mode cancellation to decrease errors from process variation, temperature, and environmental stress. The sense element is hermetically sealed at the wafer level by bonding a second silicon lid wafer to the device using a glass frit. A separate ASIC device packaged with the sense element provides signal conditioning, and intelligent user-programmable application algorithms. The accelerometer is delivered in a 3 x 3 x 0.9 mm LGA plastic package operating from a 1.71 3.6V DC supply. Voltage regulators are used to maintain constant internal operating voltages over the range of input supply voltages. This results in stable operating characteristics over the range of input supply voltages and virtually undetectable 2 ratiometric error. I C or SPI digital protocol is used to communicate with the chip to configure and TM check for updates to the orientation, Directional Tap detection and activity monitoring algorithms. Features 3 x 3 x 0.9 mm LGA User-selectable g Range and Output Data Rate User-selectable low power mode or high resolution mode Digital High-Pass Filter Outputs Embedded FIFO/FILO buffer Low Power Consumption with FlexSet Performance Optimization Internal voltage regulator TM Enhanced integrated Directional Tap/Double-Tap , and Device-orientation Algorithms User-configurable wake-up function 2 Digital I C up to 3.4 MHz Digital 3-wire and 4-wire SPI up to 10 MHz Lead-free Solderability Excellent Temperature Performance High Shock Survivability Factory Programmed Offset and Sensitivity Self-test Function 36 Thornwood Dr. Ithaca, NY 14850 2016 Kionix All Rights Reserved tel: 607-257-1080 fax:607-257-1146 www.kionix.com - info kionix.com Page 1 of 77 Not Recommended for New Designs PART NUMBER: 2g / 4g / 8g Tri-axis Digital KX023-1025 Rev. 12.0 Accelerometer Specifications 5-Apr-16 Table of Contents PRODUCT DESCRIPTION .................................................................................................................................................................... 1 FEATURES ......................................................................................................................................................................................... 1 TABLE OF CONTENTS ......................................................................................................................................................................... 2 FUNCTIONAL DIAGRAM .................................................................................................................................................................... 6 PRODUCT SPECIFICATIONS ................................................................................................................................................................ 7 MECHANICAL ............................................................................................................................................................................................ 7 ELECTRICAL ............................................................................................................................................................................................... 8 Start Up Time Profile ........................................................................................................................................................................ 9 Current Profile .................................................................................................................................................................................. 9 Power-On Procedure ....................................................................................................................................................................... 10 ENVIRONMENTAL ..................................................................................................................................................................................... 11 TERMINOLOGY ........................................................................................................................................................................................ 12 g ...................................................................................................................................................................................................... 12 Sensitivity ........................................................................................................................................................................................ 12 Zero-g offset ................................................................................................................................................................................... 12 Self-test ........................................................................................................................................................................................... 12 FUNCTIONALITY ....................................................................................................................................................................................... 13 Sense element ................................................................................................................................................................................. 13 ASIC interface ................................................................................................................................................................................. 13 Factory calibration .......................................................................................................................................................................... 13 APPLICATION SCHEMATIC .......................................................................................................................................................................... 14 PIN DESCRIPTIONS ................................................................................................................................................................................... 14 TEST SPECIFICATIONS ................................................................................................................................................................................ 15 PACKAGE DIMENSIONS AND ORIENTATION ................................................................................................................................................... 16 Dimensions ..................................................................................................................................................................................... 16 Orientation ..................................................................................................................................................................................... 17 DIGITAL INTERFACE ......................................................................................................................................................................... 19 2 I C SERIAL INTERFACE ............................................................................................................................................................................... 19 2 I C Operation .................................................................................................................................................................................. 20 Writing to 8-bit Register ................................................................................................................................................................. 21 Reading from 8-bit Register ............................................................................................................................................................ 21 Data Transfer Sequences ................................................................................................................................................................ 22 HS-mode ......................................................................................................................................................................................... 23 2 I C Timing Diagram ......................................................................................................................................................................... 24 SPI COMMUNICATIONS............................................................................................................................................................................. 25 4-Wire SPI Interface ........................................................................................................................................................................ 25 4-Wire SPI Timing Diagram ............................................................................................................................................................ 26 4-Wire Read and Write Registers ................................................................................................................................................... 27 3-Wire SPI Interface ........................................................................................................................................................................ 28 36 Thornwood Dr. Ithaca, NY 14850 2016 Kionix All Rights Reserved tel: 607-257-1080 fax:607-257-1146 www.kionix.com - info kionix.com Page 2 of 77 Not Recommended for New Designs