PART NUMBER: 8g / 16g / 32g / 64g Tri-axis KX134-1211 Digital Accelerometer Rev. 1.0 Specifications 31-Jul-2019 Product Description The KX134-1211 is a tri-axis 8g, 16g, 32g, or 64g silicon micromachined accelerometer featuring a user-configurable 3-stage Advanced Data Path (ADP) consisting of a low-pass filter, low-pass/high-pass filter, and RMS calculation engine. The KX134-1211 accelerometer also features an advanced Wake-Up and Back-to-Sleep detection with a high-resolution threshold capability configurable down to 15.6 mg, 512-byte buffer that continues to record data even when being TM read, as well as embedded engines for orientation, Directional-Tap /Double- TM Tap , and Free fall detection. 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 wafer. A separate ASIC device packaged with the sense element provides signal conditioning and intelligent user-programmable application algorithms. The KX134-1211 accelerometers offer lower noise and improved linearity over of the entire temperature range. The accelerometer is delivered in a 2 x 2 x 0.9 mm LGA 12-pin plastic package operating from a 1.7V 3.6V (VDD) / 1.2V 3.6V (IO VDD) DC supplies. Internal voltage regulators are used to maintain constant internal operating voltages over the range of input supply voltages. This results in stable operating characteristics even if the supply voltage changes. IC or SPI digital protocol is supported to configure the chip, read acceleration outputs, and check for TM TM updates to the orientation, Directional-Tap /Double-Tap detection, Free fall detection, and activity monitoring algorithms. Two configurable interrupt pins are also available to show the output of the embedded detection algorithms. Features TM TM Operating temperature range from -40C to +105C Integrated Free fall, Directional-Tap / Double-Tap , and Device-orientation algorithms Small footprint: 2 x 2 x 0.9 mm LGA 12-pin package User-configurable g-range up to 64g and Output Data Rate Improved ODR accuracy in Low Power mode over up to 25600Hz temperature Embedded 512-byte FIFO buffer continues to record data A user-configurable 3-stage Advanced Data Path (ADP) even when being read consisting of a low-pass filter, low-pass/high-pass filter, and RMS calculation engine. User-selectable Low Power or High-Performance modes High resolution Wake-Up / Back-to-Sleep functions with Internal voltage regulator 2 threshold configurable down to 15.6 mg Digital I C up to 3.4MHz and Digital SPI up to 10MHz User accessible manufacturer and part ID registers Excellent temperature performance with high shock Self-test Function survivability RoHS / REACH compliant 36 Thornwood Dr. Ithaca, NY 14850 2019 Kionix All Rights Reserved tel: 607-257-1080 fax:607-257-1146 894-12874-1907311605-0.2 www.kionix.com - info kionix.com Page 1 of 31 PART NUMBER: 8g / 16g / 32g / 64g Tri-axis KX134-1211 Digital Accelerometer Rev. 1.0 Specifications 31-Jul-2019 Table of Contents PRODUCT DESCRIPTION ................................................................................................................................................................... 1 FEATURES ......................................................................................................................................................................................... 1 TABLE OF CONTENTS ........................................................................................................................................................................ 2 FUNCTIONAL DIAGRAM .................................................................................................................................................................... 4 PRODUCT SPECIFICATIONS ............................................................................................................................................................... 5 MECHANICAL ............................................................................................................................................................................................. 5 ELECTRICAL ............................................................................................................................................................................................... 6 Start Up Time Profile ......................................................................................................................................................................... 7 Current Profile ................................................................................................................................................................................... 7 Power-On Procedure ......................................................................................................................................................................... 8 ENVIRONMENTAL ....................................................................................................................................................................................... 9 Handling, Mounting, Soldering ......................................................................................................................................................... 9 Floor Life ............................................................................................................................................................................................ 9 TERMINOLOGY ......................................................................................................................................................................................... 10 g ...................................................................................................................................................................................................... 10 Sensitivity ........................................................................................................................................................................................ 10 Zero-g offset .................................................................................................................................................................................... 10 Self-test ........................................................................................................................................................................................... 10 FUNCTIONALITY ........................................................................................................................................................................................ 11 Sense element ................................................................................................................................................................................. 11 ASIC interface .................................................................................................................................................................................. 11 Factory calibration .......................................................................................................................................................................... 11 APPLICATION SCHEMATIC .......................................................................................................................................................................... 12 PIN DESCRIPTION ..................................................................................................................................................................................... 12 PACKAGE DIMENSIONS AND ORIENTATION .................................................................................................................................................... 13 Dimensions ...................................................................................................................................................................................... 13 Orientation ...................................................................................................................................................................................... 14 DIGITAL INTERFACE ........................................................................................................................................................................ 17 2 I C SERIAL INTERFACE................................................................................................................................................................................ 17 2 I C Operation ................................................................................................................................................................................... 18 Writing to an 8-bit Register ............................................................................................................................................................. 20 Reading from an 8-bit Register ....................................................................................................................................................... 20 Data Transfer Sequences ................................................................................................................................................................. 21 HS-mode .......................................................................................................................................................................................... 22 2 I C Timing Diagram ......................................................................................................................................................................... 23 SPI COMMUNICATIONS ............................................................................................................................................................................. 24 4-Wire SPI Interface......................................................................................................................................................................... 24 4-Wire SPI Timing Diagram ............................................................................................................................................................. 25 4-Wire Read and Write Registers .................................................................................................................................................... 26 3-Wire SPI Interface......................................................................................................................................................................... 27 3-Wire SPI Timing Diagram ............................................................................................................................................................. 28 3-Wire Read and Write Registers .................................................................................................................................................... 29 36 Thornwood Dr. Ithaca, NY 14850 2019 Kionix All Rights Reserved tel: 607-257-1080 fax:607-257-1146 894-12874-1907311605-0.2 www.kionix.com - info kionix.com Page 2 of 31