AIS328DQ STMicroelectronics

AIS328DQ High-performance ultra low-power 3-axis accelerometer with digital output for automotive applications Datasheet production data Features Wide supply voltage range: 2.4 V to 3.6 V Low voltage compatible IOs: 1.8 V Ultra low-power mode consumption: down to 10 A 2g/4g/8g dynamically selectable full-scale 2 3 SPI / I C digital output interface QFN 24 (4 x 4 x 1.8 mm ) 16-bit data output 2 independent programmable interrupt generators System sleep/wakeup function Description Extended temperature range: -40 C to 105 C The AIS328DQ is an ultra low-power high Embedded self-test performance 3-axis linear accelerometer with a 2 High shock survivability: up to 10000 g digital serial interface SPI standard output. An I C compatible interface is also available. The device ECOPACK RoHS and Green compliant features ultra low-power operational modes that AEC-Q100 qualification allow advanced power saving and smart sleep-to- wakeup functions. The AIS328DQ has dynamic Applications user-selectable full-scales of 2g/4g/8g and is capable of measuring accelerations with output Telematics and black boxes data rates from 0.5 Hz to 1 kHz. The self-test In-dash car navigation capability allows the user to check the functioning of the sensor in the final application. The device Tilt / inclination measurement may be configured to generate an interrupt signal Anti-theft devices through inertial wakeup events, or by the position Intelligent power saving of the device itself. Thresholds and the timing of interrupt generators are programmable by the end Impact recognition and logging user on-the-fly. Available in a small quad flat pack Vibration monitoring and compensation no-lead package (QFPN) with a 4x4 mm footprint, Motion-activated functions the AIS328DQ is able to respond to the trend towards application miniaturization, and is guaranteed to operate over a temperature range from -40 C to +105 C. Table 1. Device summary Order codes Temperature range C Package Packaging AIS328DQ -40 to +105 QFPN 4x4x1.8 24L Tray AIS328DQTR -40 to +105 QFPN 4x4x1.8 24L Tape and reel April 2012 Doc ID 18160 Rev 3 1/43 This is information on a product in full production. www.st.com 43Contents AIS328DQ Contents 1 Block diagram and pin description . 6 1.1 Block diagram . 6 1.2 Pin description 6 2 Mechanical and electrical specifications 8 2.1 Mechanical characteristics . 8 2.2 Electrical characteristics . 9 2.3 Communication interface characteristics . 10 2.3.1 SPI - serial peripheral interface . 10 2.3.2 IC - inter IC control interface . 11 2.4 Absolute maximum ratings 12 2.5 Terminology . 13 2.5.1 Sensitivity 13 2.5.2 Zero-g level 13 2.5.3 Self-test . 13 2.5.4 Sleep-to-wakeup 14 3 Functionality 15 3.1 Sensing element 15 3.2 IC interface 15 3.3 Factory calibration 15 4 Application hints . 16 5 Digital interfaces . 17 5.1 IC serial interface 17 5.1.1 IC operation . 18 5.2 SPI bus interface . 19 5.2.1 SPI read . 20 5.2.2 SPI write 21 5.2.3 SPI read in 3-wire mode 22 6 Register mapping 23 2/43 Doc ID 18160 Rev 3