LIS2DE

LIS2DE MEMS digital output motion sensor: ultra-low-power high-performance 3-axisfemt accelerometer Datasheet - production data Intelligent power saving for handheld devices Pedometers Display orientation Gaming and virtual reality input devices Impact recognition and logging LGA-14 (2.0x2.0x1 mm) Vibration monitoring and compensation Description Features The LIS2DE is an ultra-low-power high- Wide supply voltage, 1.71 V to 3.6 V performance 3-axis linear accelerometer Independent IO supply (1.8 V) and supply belonging to the femto family, with digital voltage compatible 2 I C/SPI serial interface standard output. The Ultra-low-power mode consumption down to device features ultra-low-power operational 2 A modes that allow advanced power saving and smart embedded functions. 2g/4g/8g/16g dynamically selectable full scales The LIS2DE has dynamically user-selectable full 2 scales of 2g/4g/8g/16g and is capable of I C/SPI digital output interface measuring accelerations with output data rates 8-bit data output from 1 Hz to 5 kHz. The self-test capability allows 2 independent programmable interrupt the user to check the functioning of the sensor in generators for free-fall and motion detection the final application. The device may be configured to generate interrupt signals by two 6D/4D orientation detection independent inertial wakeup/free-fall events as Sleep-to-wake and Return-to-sleep well as by the position of the device itself. functions Thresholds and the timing of interrupt generators Free-fall detection are programmable by the end user on the fly. The LIS2DE has an integrated 32-level first-in, first-out Motion detection (FIFO) buffer allowing the user to store data in Embedded temperature sensor order to limit intervention by the host processor. Embedded self-test The LIS2DE is available in a small thin plastic land grid array package (LGA) and it is Embedded FIFO guaranteed to operate over an extended 10000 g high shock survivability temperature range from -40 C to +85 C. ECOPACK , RoHS and Green compliant Table 1. Device summary Applications Temp. Order codes Package Packaging range C Motion-activated functions LIS2DE -40 to +85 LGA-14 Tray Free-fall detection LIS2DETR -40 to +85 LGA-14 Tape and reel Click/double-click recognition June 2014 DocID023717 Rev 2 1/45 This is information on a product in full production. www.st.comContents LIS2DE Contents 1 Block diagram and pin description . 7 1.1 Block diagram . 7 1.2 Pin description 7 2 Mechanical and electrical specifications 9 2.1 Mechanical characteristics . 9 2.2 Temperature sensor characteristics . 10 2.3 Electrical characteristics 10 2.4 Communication interface characteristics . 11 2.4.1 SPI - serial peripheral interface . 11 2 2.4.2 I C - inter-IC control interface 12 2.5 Absolute maximum ratings 13 3 Terminology and functionality 14 3.1 Terminology . 14 3.1.1 Sensitivity 14 3.1.2 Zero-g level 14 3.2 Functionality . 14 3.2.1 Normal mode, low-power mode . 14 3.2.2 Self-test . 14 3.2.3 6D / 4D orientation detection . 15 3.2.4 Sleep-to-wake and return-to-sleep functions . 15 3.3 Sensing element 15 3.4 IC interface 16 3.5 Factory calibration 16 3.6 FIFO . 16 3.7 Temperature sensor . 16 4 Application hints . 17 4.1 Soldering information 17 5 Digital main blocks . 18 5.1 FIFO . 18 2/45 DocID023717 Rev 2