LIS35DE STMicroelectronics

LIS35DE MEMS motion sensor 3-axis - 2g/8g smart digital output piccolo accelerometer Feature 2.16 V to 3.6 V supply voltage 1.8V compatible IOs < 1 mW power consumption 2g/8g dynamically selectable full-scale 2 LGA14 (3x5x0.9mm) I C/SPI digital output interface Programmable multiple interrupt generator process developed by ST to produce inertial Click and double click recognition sensors and actuators in silicon. Embedded high pass filter The IC interface is manufactured using a CMOS 10000g high shock survivability process that allows to design a dedicated circuit ECOPACK RoHS and Green compliant which is trimmed to better match the sensing (see Section 8) element characteristics. The LIS35DE has dynamically user selectable full Applications scales of 2g/8g and it is capable of measuring accelerations with an output data rate of 100 Hz Free-fall detection or 400 Hz. Motion activated functions The device may be configured to generate inertial Gaming and virtual reality input devices wake-up/free-fall interrupt signals when a Vibration monitoring and compensation programmable acceleration threshold is crossed at least in one of the three axes. Thresholds and timing of interrupt generators are programmable Description by the end user on the fly. The LIS35DE is an ultra compact low-power three The LIS35DE is available in plastic Thin Land axis linear accelerometer. It includes a sensing Grid Array package (TGA) and it is designed to element and an IC interface able to provide the operate over an extended temperature range from measured acceleration to the external world 2 -40C to +85C. through I C/SPI serial interface. The sensing element, capable of detecting the acceleration, is manufactured using a dedicated Table 1. Device summary Order code Temp range, CPackage Packing LIS35DE -40 to +85 LGA14 Tray LIS35DETR -40 to +85 LGA14 Tape and reel April 2009 Doc ID 15594 Rev 1 1/39 www.st.com 39 Contents LIS35DE Contents 1 Block diagram and pin description . 5 1.1 Block diagram . 5 1.2 Pin description 5 2 Mechanical and electrical specifications 7 2.1 Mechanical characteristics . 7 2.2 Electrical characteristics . 8 2.3 Communication interface characteristics 9 2.3.1 SPI - serial peripheral interface 9 2.3.2 I2C - Inter IC Control Interface 10 2.4 Absolute maximum ratings 11 2.5 Terminology . 12 2.5.1 Sensitivity 12 2.5.2 Zero-g level 12 2.5.3 Click and double click recognition . 12 3 Functionality 13 3.1 Sensing element 13 3.2 IC interface 13 3.3 Factory calibration 13 4 Application hints . 14 4.1 Soldering information 14 5 Digital interfaces . 15 5.1 I2C serial interface 15 5.1.1 I2C operation . 16 5.2 SPI bus interface . 17 5.2.1 SPI read . 19 5.2.2 SPI write 19 5.2.3 SPI read in 3-wires mode . 20 6 Register mapping 21 2/39 Doc ID 15594 Rev 1