LIS3DH STMicroelectronics

LIS3DH MEMS digital output motion sensor ultra low-power high performance 3-axes nano accelerometer Features Wide supply voltage, 1.71 V to 3.6 V Independent IOs supply (1.8 V) and supply voltage compatible Ultra low-power mode consumption down to 2 A LGA-16 (3x3x1 mm) 2g/4g/8g/16g dynamically selectable full- 2 belonging to the nano family, with digital I C/SPI scale serial interface standard output. The device 2 I C/SPI digital output interface features ultra low-power operational modes that allow advanced power saving and smart 16 bit data output embedded functions. 2 independent programmable interrupt generators for free-fall and motion detection The LIS3DH has dynamically user selectable full scales of 2g/4g/ 8g/ 16g and it is capable of 6D/4D orientation detection measuring accelerations with output data rates Free-fall detection from 1 Hz to 5 kHz. The self-test capability allows Motion detection the user to check the functioning of the sensor in the final application. The device may be Embedded temperature sensor configured to generate interrupt signals by two Embedded self-test independent inertial wake-up/free-fall events as Embedded 96 levels of 16 bit data output FIFO well as by the position of the device itself. Thresholds and timing of interrupt generators are 10000 g high shock survivability programmable by the end user on the fly. The ECOPACK RoHS and Green compliant LIS3DH has an integrated 32-level first in, first out (FIFO) buffer allowing the user to store data for Applications host processor intervention reduction. The LIS3DH is available in small thin plastic land grid Motion activated functions array package (LGA) and it is guaranteed to Free-fall detection operate over an extended temperature range from -40 C to +85 C. Click/double click recognition Intelligent power saving for handheld devices Table 1. Device summary Pedometer Temp. Order codes Package Packaging Display orientation range C Gaming and virtual reality input devices LIS3DH -40 to +85 LGA-16 Tray Impact recognition and logging LIS3DHTR -40 to +85 LGA-16 Tape and reel Vibration monitoring and compensation Description The LIS3DH is an ultra low-power high performance three axes linear accelerometer May 2010 Doc ID 17530 Rev 1 1/42 www.st.com 42Contents LIS3DH Contents 1 Block diagram and pin description . 8 1.1 Block diagram . 8 1.2 Pin description 8 2 Mechanical and electrical specifications . 10 2.1 Mechanical characteristics 10 2.2 Temperature sensor characteristics . 11 2.3 Electrical characteristics 11 2.4 Communication interface characteristics . 12 2.4.1 SPI - serial peripheral interface . 12 2.4.2 I2C - Inter IC control interface 13 2.5 Absolute maximum ratings 14 3 Terminology and functionality 15 3.1 Terminology . 15 3.1.1 Sensitivity 15 3.1.2 Zero-g level 15 3.2 Functionality . 15 3.2.1 Normal mode, low power mode . 15 3.2.2 Self-test . 16 3.2.3 6D / 4D orientation detection . 16 3.3 Sensing element 16 3.4 IC interface 16 3.5 Factory calibration 17 3.6 FIFO . 17 3.7 Auxiliary ADC 17 4 Application hints . 18 4.1 Soldering information 18 5 Digital main blocks . 19 5.1 FIFO . 19 5.1.1 Bypass mode . 19 2/42 Doc ID 17530 Rev 1