HXY MOSFET LIS2DW12TR-HXY

LIS2DW12TR is an accelerometer IC featuring rich functionality, low power consumption, compact size, and precise measurement. It communicates with the MCU via I²C/SPI interface, and acceleration measurement data can be retrieved through interrupt mode or polling mode. INT1 and INT2 provide numerous auto-detected interrupt signals suitable for a wide range of motion detection applications. Interrupt sources include position data interrupts, FIFO data WTM and OVERRUN interrupts, 6D/4D orientation detection interrupts, free-fall detection interrupts, sleep and wake-up detection interrupts, and single/double-tap detection interrupts. An internal high-precision calibration module accurately compensates for sensor offset and gain errors. It supports dynamically selectable full-scale ranges of ±2G / ±4G / ±8G / ±16G, capable of measuring acceleration at output data rates from 1Hz to 400Hz. The self-test function allows users to verify sensor functionality within the end application. The available tilt calibration function compensates for tilt caused by SMT or PCB mounting without occupying system resources, and system updates do not affect sensor parameters. The LIS2DW12TR is an ultra-compact, low-power, digital-output 3-axis linear accelerometer in an LGA package. The complete device includes a mechanical sensing unit and an IC interface that acquires information from the sensing unit and provides signals to an external MCU via I²C or SPI interface. The mechanical sensing unit consists of a suspended proof mass and a silicon frame. The proof mass is connected to the silicon frame at several points called anchors and is free to move in the direction of the sensed acceleration. To ensure compatibility with conventional packaging technology, a cap is placed on top of the sensing element to prevent the moving parts from being blocked during the molding stage of plastic packaging. When the sensor is subjected to acceleration, the proof mass is displaced from its nominal position, causing an imbalance in the capacitive half-bridge. This imbalance is measured by charge integration of voltage pulses applied to the capacitors. Under steady-state conditions, the nominal capacitance values are in the range of a few pF, while the maximum capacitance variation under applied acceleration is in the fF range. The complete measurement chain consists of a low-noise capacitive amplifier that converts the capacitive imbalance of the MEMS sensor into an analog voltage, which is then delivered to the user via an ADC. Acceleration data is accessible through the I²C/SPI interface, making the device particularly well-suited for direct interfacing with microcontrollers. The LIS2DW12TR features a data-ready signal (RDY) that indicates when a new set of measured acceleration data is available, simplifying data synchronization in digital systems using this device. It can also be configured to generate inertial wake-up and free-fall interrupt signals based on acceleration events programmed along the enabled axes. The IC interface is factory-calibrated for sensitivity (So) and zero-g level (Tyoff). Trim values are stored in the device's internal EEPROM. Each time the device powers on, the trim parameters are downloaded into registers for use during normal operation. This allows the device to be used without further calibration. In this configuration, an interrupt is generated when the device is stationary in a known orientation. All 6-direction detection in 3D space are enabled. Refer to the application note for detailed configuration. An interrupt is generated when the sensor is in free-fall condition. During free fall, the sensor proof mass is in a weightless state, with the theoretical output of all three axes being zero. When the sensor detector detects that the three-axis output falls below the threshold, an interrupt signal is generated and the corresponding status register is set. Sleep detection: When the sensor output remains constant within a given threshold range for a period of time, the sensor is determined to be inactive.

• Supply voltage 1.71V to 3.6V
• Separate IO supply (1.8V), compatible with supply voltage
• Power-down mode current as low as 1uA
• ±2G / ±4G / ±8G / ±16G selectable full-scale range
• 12-bit valid data (DLPF)
• I²C/SPI digital output interface
• 6D/4D orientation detection
• Free-fall detection
• Single/double-tap and motion detection
• Programmable interrupt generator
• Embedded self-test
• Embedded FIFO
• 10000g high shock resistance

• Mobile phones/tablets
• Indoor navigation
• Image rotation
• Motion-activated UI
• Gaming
• Smart wearables