STMicroelectronics LIS352AXTR

Overview

LIS352AXTR from STMicroelectronics is a 3-axis ±2 g analog-output MEMS accelerometer in LGA-14 package, delivering absolute DC-coupled voltage outputs per axis (Voutx/Vouty/Voutz), with factory-trimmed sensitivity (0.363 V/g) and zero-g level (1.25 V), enabling tilt sensing and free-fall detection in battery-constrained mobile terminals.

For engineers reviewing the LIS352AXTR datasheet, LIS352AXTR pinout, LIS352AXTR application, or LIS352AXTR equivalent, key selection considerations include its 2 kHz resonant frequency, 32 kΩ output impedance, multiplexed single-pin analog output capability, self-test functionality, and power-down mode consuming only 1 µA.

Technical Context

The LIS352AXTR integrates a surface-micromachined capacitive sensing element with a fully differential CMOS interface featuring correlated double sampling (CDS) to suppress offset and 1/f noise. Each channel uses a dedicated sample-and-hold circuit before output.

It implements an embedded 2-bit analog multiplexer (S0/S1 controlled) routing X/Y/Z or Aux_in to the shared Vout pin, while maintaining independent 32 kΩ output impedance on each channel and supporting external RC filtering down to 1 Hz via CLOAD ≥ 2.5 nF.

Key Specifications

Pinout & Package

Package: LGA-14 (3 mm × 5 mm × 0.9 mm, 0.8 mm pitch), RoHS-compliant ECOPACK® package optimized for high-volume MEMS sensor assembly and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-axis analog-output MEMS accelerometer applications.

Compared with ADXL335BCPZ and MMA7361L, the LIS352AXTR offers superior temperature stability, built-in diagnostics (self-test), and analog multiplexing-enabling smaller BOMs, reduced layout area, and higher reliability in industrial and mobile applications.

Availability

LIS352AXTR is available at Aetrix Electronics and suitable for free-fall detection, tilt sensing, gaming input, and anti-theft systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LIS352AXTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and automotive components with focus on energy efficiency and system integration.

The LIS352AXTR belongs to ST's "piccolo" family of ultra-compact analog accelerometers-designed specifically for space-constrained, battery-powered devices needing reliable gravity-based motion awareness without digital overhead.

FAQ

What is the recommended external capacitor value for 100 Hz anti-aliasing on Voutx?

For a 100 Hz cutoff frequency, use a 50 nF ceramic capacitor between Voutx and GND. This pairs with the device's nominal 32 kΩ output impedance to form a first-order RC filter. The datasheet confirms 50 nF yields ~100 Hz (±20% due to Rout tolerance), and recommends placing it as close as possible to the pin to minimize parasitic inductance.

How does the self-test function verify both mechanical and electrical integrity?

The self-test applies an electrostatic force to the MEMS proof mass, inducing a known displacement that generates a measurable DC voltage shift (40–550 mV) on the selected output channel. If the observed ΔV falls within spec, it confirms the sensing element is unbound, the charge amplifier is functional, and the output buffer is operational-validating the full signal chain.

Can the LIS352AXTR operate from a 2.5 V supply?

Yes-the LIS352AXTR supports Vdd from 2.16 V to 3.6 V. While factory calibration is performed at 3.3 V, all analog parameters (sensitivity and zero-g level) are absolute to Vdd, meaning output scaling remains consistent: e.g., at 2.5 V supply, zero-g remains ~1.25 V and sensitivity stays ~0.363 V/g, preserving measurement accuracy.

Why does the datasheet specify two different capacitive load limits: 2.5 nF for Voutx/y/z and 10 pF for Vout?

Voutx/y/z drive high-impedance RC filters (Rout = 32 kΩ), requiring ≥2.5 nF for stable low-frequency response down to 1 Hz. In contrast, the multiplexed Vout pin has 1 kΩ series resistance and is intended for direct ADC connection-hence its 10 pF limit prevents instability and settling-time degradation when driving typical SAR ADC input capacitance.