STMicroelectronics E-LIS3L02AS4

Overview

E-LIS3L02AS4 from STMicroelectronics is a low-power, analog-output 3-axis linear accelerometer with user-selectable ±2g/±6g full-scale range, 0.5 mg resolution over 100 Hz bandwidth, ratiometric output voltage (Voutx/Vouty/Voutz), and integrated self-test and power-down functions. It operates from 2.4 V to 3.6 V and is used in mobile terminal motion sensing, free-fall detection for HDD protection, and inertial navigation subsystems.

For engineers reviewing the E-LIS3L02AS4 datasheet, E-LIS3L02AS4 pinout, E-LIS3L02AS4 application, or E-LIS3L02AS4 equivalent, this device delivers calibrated analog acceleration signals per axis with factory-trimmed zero-g offset and sensitivity, enabling plug-and-play integration into space-constrained industrial and consumer motion-sensing systems without external calibration.

Technical Context

The LIS3L02AS4 integrates a surface-micromachined silicon sensing element with a fully differential CMOS interface featuring Correlated Double Sampling (CDS) to suppress 1/f noise and offset. Its three independent S/H stages sample at 66 kHz, supporting DC–1.5 kHz bandwidth per axis with external RC filtering.

All analog parameters - zero-g level (Vdd/2 ±10%), sensitivity (Vdd/5 @ ±2g or Vdd/15 @ ±6g), and self-test voltage change - are ratiometric to supply voltage. The device uses internal 110 kΩ output impedance with minimum 320 pF load capacitance to define low-pass corner frequency, enabling configurable anti-aliasing.

Key Specifications

Pinout & Package

Package: SO24 (Small Outline, 24-pin), lead-free and ECOPACK® compliant, 15.6 mm × 7.6 mm × 2.65 mm body height, 0.6 g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LIS331DLH and ADXL335, the E-LIS3L02AS4 uniquely combines analog simplicity, embedded self-test, and dual full-scale selection in a single SO24 package - making it optimal for cost-sensitive, space-constrained designs requiring verified mechanical integrity and rapid power-state transitions.

Availability

E-LIS3L02AS4 is available at Aetrix Electronics and suitable for mobile terminal motion sensing, HDD free-fall protection, and industrial vibration monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for E-LIS3L02AS4 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 analog, MEMS, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The LIS3L02AS4 belongs to ST's legacy analog MEMS accelerometer product line, engineered specifically for cost-effective, high-reliability motion sensing in battery-powered and shock-prone applications where analog interface simplicity and factory calibration are essential.

FAQ

What is the recommended decoupling for E-LIS3L02AS4?

Place a 100 nF ceramic capacitor and a 10 µF aluminum electrolytic capacitor as close as possible to pins 6 (GND) and 7 (Vdd). This dual-capacitor network suppresses high-frequency switching noise and low-frequency supply sag, ensuring stable biasing of the internal charge amplifier and S/H circuits across operating temperatures.

How does the FS pin affect sensitivity and noise performance?

When FS = 0 (±2g), sensitivity is Vdd/5 V/g (e.g., 0.66 V/g at 3.3 V); when FS = 1 (±6g), sensitivity drops to Vdd/15 V/g (0.22 V/g). Noise density remains constant at ~50 µg/√Hz, so resolution degrades proportionally - 0.5 mg at ±2g becomes ~1.5 mg at ±6g - but dynamic range increases threefold.

Can E-LIS3L02AS4 be used without external filtering capacitors?

Yes, but only for DC or very low-frequency applications. Without external Cload, the internal 110 kΩ Rout and stray capacitance yield an undefined, high corner frequency (>10 kHz), risking aliasing and increased broadband noise. ST specifies minimum 320 pF Cload per output to ensure stable operation and defined bandwidth.

Is the self-test function usable at all supply voltages?

Yes, but self-test output voltage change scales cubically with Vdd. At 2.4 V, ΔVst is ~22 mV (vs. ±50 mV at 3.3 V); at 3.6 V, it reaches ~72 mV. Users must adjust pass/fail thresholds accordingly. The test validates both mechanical displacement and analog signal path integrity across the full 2.4–3.6 V range.