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LIS344ALHTR

3-axis analog accelerometer, +/-2/6g, 2.4-3.6V, LGA-16 (4x4mm), ratiometric, self-test

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Manufacturer Part：

LIS344ALHTR

Package：

LGA-16 (4.0 x 4.0 x 1.5 mm)

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Description

Product Overview

The LIS344ALHTR from STMicroelectronics is a high-performance 3-axis linear accelerometer with analog output, featuring user-selectable +/-2g or +/-6g full-scale ranges in an ultra-compact LGA-16 (4x4x1.5mm) package. Operating from 2.4V to 3.6V with factory-trimmed sensitivity and offset, it provides ratiometric analog voltage outputs ideal for motion sensing and tilt measurement in consumer and industrial applications.

Key Specifications

Number of Axes 3 (X, Y, Z)
Full-Scale Range +/-2g or +/-6g (selectable)
Output Type Analog (ratiometric to supply)
Supply Voltage 2.4 V to 3.6 V
Sensitivity (+/-2g) 660 mV/g (typ)
Zero-g Offset 1.5 V (typ at 3.0V)
Bandwidth 1.5 kHz (selectable via external caps)
Self-Test Integrated
Shock Survival 10,000 g
Operating Temperature -40C to +85C

Features

  • User-selectable +/-2g or +/-6g full-scale range for flexibility
  • Ratiometric analog output eliminates need for ADC reference
  • Factory-trimmed sensitivity and offset for consistent performance
  • Embedded self-test function for system integrity verification
  • 10,000g shock survival for rugged environments
  • Ultra-compact LGA-16 (4x4x1.5mm) package

Applications

  • Free-fall detection and motion sensing
  • Tilt measurement and orientation detection
  • Vibration monitoring and analysis
  • Gaming and virtual reality input devices

The LIS344ALHTR from STMicroelectronics is a high-performance 3-axis linear accelerometer with analog voltage output in an ultra-compact LGA-16 package. The device features user-selectable full-scale ranges of +/-2g and +/-6g, with sensitivity of 660 mV/g (typical at +/-2g, 3.0V supply) and zero-g offset of 1.5V. The output voltage is ratiometric to the supply voltage, simplifying ADC interface design. Factory trimming ensures consistent sensitivity and offset across devices. The device operates from 2.4V to 3.6V with current consumption of 650 uA typical. An integrated self-test function allows system integrity verification by applying an electrostatic force to the sensing element. The MEMS sensing element can survive mechanical shocks up to 10,000g.

The LIS344ALHTR uses a capacitive MEMS sensing element with a proof mass suspended by silicon springs. (1) Sensing Element: Each axis consists of a movable proof mass with interdigitated fingers forming differential capacitors with fixed electrodes. When acceleration is applied along any axis, the proof mass displaces, changing the differential capacitance. (2) Capacitance-to-Voltage: An internal C-V converter measures the capacitance change and produces a voltage proportional to the applied acceleration. The analog output voltage is ratiometric to the supply voltage (VDD/2 at zero-g). (3) Range Selection: The FS pin selects between +/-2g (FS=0) and +/-6g (FS=1) full-scale ranges by adjusting the capacitive sensitivity. (4) Bandwidth: The output bandwidth is set by external capacitors on the Cx, Cy, Cz pins, allowing cutoff frequency from 40 Hz to 1500 Hz. (5) Self-Test: Setting the ST pin activates an electrostatic force on the proof mass, producing a known output deflection that verifies sensor functionality.

Pin Name Type Function
1 Vdd Power Supply voltage (2.4-3.6V)
2 GND Ground Ground reference
3,4 Res – Reserved (connect to GND)
5 OutZ Output Z-axis analog output
6 OutY Output Y-axis analog output
7 OutX Output X-axis analog output
8 FS Input Full-scale selection (0=+/-2g, 1=+/-6g)
9 ST Input Self-test enable (active high)
10 Cz I/O Bandwidth setting cap for Z-axis
11 Cy I/O Bandwidth setting cap for Y-axis
12 Cx I/O Bandwidth setting cap for X-axis
13,14 Res – Reserved
15 Pd Input Power down (active low, connect to Vdd)
16 Vdd Power Supply voltage
  • Free-fall detection and motion sensing in consumer electronics with analog output
  • Tilt measurement and orientation detection in industrial equipment
  • Vibration monitoring and analysis with 1.5 kHz bandwidth
  • Gaming and VR input devices with self-test verification
Manufacturer Part Number Package Notes
STMicroelectronics LIS331DLHTR LGA-16 Digital (SPI/I2C) output version
STMicroelectronics LIS35DETR LGA-16 +/-2g, digital output
Analog Devices ADXL335BCPZ LFCSP-16 3-axis analog, +/-3g
NXP MMA7361LC LGA-16 3-axis analog, +/-1.5/6g
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