STMicroelectronics LIS344AL

Overview

LIS344AL from STMicroelectronics is a 3-axis analog-output MEMS linear accelerometer in LGA-16 package, delivering ±3.5g full-scale range, ratiometric output (0.100×V_DD V/g sensitivity), and factory-trimmed offset/sensitivity. It operates from 2.7–3.3 V, supports self-test activation via ST pin, and targets motion sensing in compact consumer electronics requiring DC-coupled acceleration measurement.

For engineers reviewing the LIS344AL datasheet, LIS344AL pinout, LIS344AL application, or LIS344AL equivalent, this page provides verified mechanical dimensions, confirmed analog channel routing (VoutX/VoutY/VoutZ), self-test voltage shift values (±84 mV), bandwidth configuration via external C_load, and real-world orientation response data at 3.0 V supply.

Technical Context

The LIS344AL integrates a surface-micromachined capacitive sensing element with a fully differential CMOS interface featuring Correlated Double Sampling (CDS) to suppress 1/f noise and offset. Its output stage uses a 32 kΩ internal resistor per channel to form a first-order RC low-pass filter with external C_load, enabling configurable bandwidth from DC to 2.0 kHz.

All analog parameters-including zero-g level (V_DD/2 ±15%), sensitivity (0.100×V_DD ±10% V/g), and self-test output shift-are ratiometric to V_DD. Factory trimming stores calibration coefficients in non-volatile memory, eliminating need for user calibration at power-up.

Key Specifications

Pinout & Package

Package: LGA-16 (4.0 × 4.0 × 1.5 mm, 0.5 mm pitch), RoHS/ECOPACK® compliant, qualified per JEDEC J-STD-020C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LIS344AL, LIS3LV02DL offers lower cost and power but sacrifices range and diagnostic capability, while ADXL335 provides broader vendor support yet demands more design effort for offset/sensitivity compensation.

Availability

LIS344AL is available at Aetrix Electronics and suitable for mobile terminals, gaming peripherals, appliance control systems, and anti-theft devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LIS344AL 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The LIS344AL belongs to ST's legacy MEMS inertial sensor family targeting ultra-compact, low-power analog motion sensing in cost-sensitive consumer electronics-prioritizing integration, factory calibration, and robustness over digital interfaces or advanced features.

FAQ

What is the minimum required load capacitance for LIS344AL outputs?

The LIS344AL requires ≥2.5 nF external capacitance on each VoutX/VoutY/VoutZ pin to ensure stable low-pass filtering and avoid oscillation. This value sets the upper limit of usable bandwidth (≈2 kHz with 32 kΩ Rout); smaller capacitors increase bandwidth but risk instability or noise amplification.

How does the self-test function verify sensor integrity?

Asserting ST pin high applies an electrostatic force to the proof mass, inducing a known acceleration equivalent to ±84 mV DC shift at 3.0 V supply. Measuring this shift confirms both mechanical mobility of the sensing element and correct operation of the analog signal chain-including amplifier, S&H, and output buffer.

Can LIS344AL operate outside its specified 2.7–3.3 V supply range?

No. Absolute maximum ratings specify V_DD from –0.3 V to 6.0 V, but functional operation is guaranteed only between 2.7 V and 3.3 V. Below 2.7 V, sensitivity and offset deviate beyond specification; above 3.3 V, long-term reliability degrades due to increased stress on internal CMOS structures.

Why are multiple GND pins provided in the LGA-16 package?

The six dedicated GND pins (pins 3,5,6,7 and implied grounding of NC pins per layout guidance) minimize ground impedance and isolate analog return paths from digital switching noise. This reduces crosstalk between axes and preserves DC accuracy-critical for tilt-sensing applications where sub-10 mg offset stability is required.