STMicroelectronics LIS3L02ALTR

Overview

LIS3L02ALTR from STMicroelectronics is a 3-axis analog-output MEMS accelerometer with ±2g full-scale range, 0.5 mg resolution over 100 Hz bandwidth, ratiometric output (Vdd/5 V/g sensitivity), and embedded self-test function. It operates from 2.4 V to 3.6 V, consumes 0.85–1.5 mA, and is housed in an 8-pin LGA-8 package for compact inertial sensing in mobile terminals and free-fall detection systems.

For engineers reviewing the LIS3L02ALTR datasheet, LIS3L02ALTR pinout, LIS3L02ALTR application, or LIS3L02ALTR equivalent, this page delivers verified mechanical and electrical specifications, validated pin-level circuit roles, confirmed temperature performance (−40°C to +85°C), and real-world design implications of its ratiometric analog outputs and self-test voltage shift.

Technical Context

The LIS3L02ALTR 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. Its three independent analog outputs (Voutx, Vouty, Voutz) are each buffered by a high-impedance S/H stage operating at 66 kHz sampling frequency.

Each channel's output impedance is 80–140 kΩ, enabling low-pass filtering via external capacitors ≥1 nF to set corner frequencies from 1 Hz to 500 Hz. The self-test function applies electrostatic force via the ST pin, inducing axis-specific DC voltage shifts (±20–100 mV at Vdd = 3.3 V), verifying mechanical and signal-path integrity without external stimulus.

Key Specifications

Pinout & Package

The LIS3L02ALTR is packaged in an 8-pin LGA-8 (5 mm × 5 mm × 1.6 mm) lead-free ECOPACK® package with exposed die pad for thermal and mechanical stability. Pin 1 (ST) is electrically connected to the self-test control input and marked by a top-side indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXL335 and LIS331DLH, the LIS3L02ALTR uniquely combines analog ratiometric outputs, deterministic self-test voltage shift, and factory-trimmed zero-g/sensitivity-enabling plug-and-play integration into analog-signal-chain designs without calibration or protocol overhead.

Availability

LIS3L02ALTR is available at Aetrix Electronics and suitable for mobile terminal tilt sensing, gaming motion input, and free-fall data protection requiring stable component supply across extended temperature ranges and long-lifecycle programs.

Supply support for LIS3L02ALTR 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 specializing in MEMS, power management, microcontrollers, and automotive ICs, with manufacturing and R&D operations across Europe, Asia, and the Americas.

The LIS3L02ALTR belongs to ST's legacy analog-output MEMS accelerometer family designed for cost-sensitive, space-constrained consumer and industrial motion-sensing applications where simplicity, reliability, and analog interface compatibility are critical.

FAQ

What is the minimum recommended load capacitance for LIS3L02ALTR outputs?

The datasheet specifies a minimum load capacitance of 1 nF for each output (Voutx/Vouty/Voutz) to ensure stable operation and defined low-pass filtering. Using less than 1 nF risks instability due to interaction with the 80–140 kΩ output impedance, potentially causing gain error or oscillation. External capacitors also enable anti-aliasing before ADC sampling.

How does the self-test function verify sensor integrity?

The self-test applies electrostatic force to the proof mass via the ST pin, inducing a known DC voltage shift (±20–100 mV depending on axis and Vdd). Measuring this shift confirms both mechanical mobility of the sensing element and correct gain/offset behavior of the analog signal chain-without requiring physical motion or external test equipment.

Why is the LIS3L02ALTR's output ratiometric to Vdd?

Ratiometric output means sensitivity (V/g) and zero-g level (V) scale linearly with Vdd-e.g., at 3.3 V, sensitivity is ~0.66 V/g and zero-g is ~1.65 V; at 2.4 V, they scale to ~0.48 V/g and ~1.2 V. This eliminates need for a separate precision voltage reference, simplifying analog signal conditioning when Vdd is stable.

Can LIS3L02ALTR operate reliably after exposure to 3000 g mechanical shock?

Yes-the absolute maximum rating specifies survival of 3000 g for 0.5 ms while powered and 10,000 g for 0.1 ms when unpowered. Post-shock functionality is preserved due to robust silicon micromachining and cap-sealed structure. However, zero-g offset may shift up to ±0.5 mg/°C, remaining within specified drift limits.