AIS328DQTR STMicroelectronics

AIS328DQ High-performance ultra-low-power 3-axis accelerometer with digital output for automotive applications Datasheet - production data Applications Telematics and black boxes In-dash car navigation Tilt / inclination measurement Anti-theft devices Intelligent power saving Impact recognition and logging 3 QFN 24 (4 x 4 x 1.8 mm ) Vibration monitoring and compensation Motion-activated functions Description Features The AIS328DQ is an ultra-low-power high- performance 3-axis linear accelerometer with a AEC-Q100 qualification digital serial interface SPI standard output. An IC Wide supply voltage range: 2.4 V to 3.6 V compatible interface is also available. The device features ultra-low-power operational modes that Low voltage compatible IOs: 1.8 V allow advanced power saving and smart sleep-to- Ultra-low-power mode consumption: down to wakeup functions. The AIS328DQ has dynamic 10 A user-selectable full scales of 2g/4g/8g and is 2g/4g/8g dynamically selectable full scale capable of measuring accelerations with output data rates from 0.5 Hz to 1 kHz. The self-test SPI / IC digital output interface capability allows the user to check the functioning 16-bit data output of the sensor in the final application. The device 2 independent programmable interrupt may be configured to generate an interrupt signal generators through inertial wakeup events, or by the position of the device itself. Thresholds and the timing of System sleep/wakeup function interrupt generators are programmable by the end Extended temperature range: -40 C to 105 C user on-the-fly. Available in a small quad flat pack Embedded self-test no-lead package (QFPN) with a 4x4 mm footprint, the AIS328DQ is able to respond to the trend High shock survivability: up to 10000 g towards application miniaturization and is ECOPACK, RoHS and Green compliant 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 2020 DocID18160 Rev 4 1/45 This is information on a product in full production. www.st.comContents AIS328DQ 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 Electrical characteristics 10 2.3 Communication interface characteristics . 12 2.3.1 SPI - serial peripheral interface . 12 2.3.2 IC - inter IC control interface . 13 2.4 Absolute maximum ratings 14 2.5 Terminology . 15 2.5.1 Sensitivity 15 2.5.2 Zero-g level 15 2.5.3 Self-test . 15 2.5.4 Sleep-to-wakeup 16 3 Functionality 17 3.1 Sensing element 17 3.2 IC interface 17 3.3 Factory calibration 17 4 Application hints . 18 5 Digital interfaces . 19 5.1 IC serial interface 19 5.1.1 IC operation . 20 5.2 SPI bus interface . 22 5.2.1 SPI read . 23 5.2.2 SPI write 24 5.2.3 SPI read in 3-wire mode 25 6 Register mapping 26 2/45 DocID18160 Rev 4