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Home > Products > Sensors, Transducers > Motion Sensors > Accelerometers

STMicroelectronics LIS3L02AQ3TR

Name: LIS3L02AQ3TR
Brand: STMicroelectronics
SKU: LIS3L02AQ3TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LIS3L02AQ3TR

Manufacturer:: STMicroelectronics

Category:: Accelerometers

Package:: 44-QFN

Datasheet:: LIS3L02AQ3TR.pdf

Description:: ACCELEROMETER 2-6G ANALOG 44QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LIS3L02AQ3TR from STMicroelectronics is a low-power, 3-axis analog-output capacitive MEMS accelerometer with user-selectable ±2g/±6g full-scale range, 1.5 kHz bandwidth per axis, ratiometric output (V_out ∝ V_dd), and integrated self-test and power-down functions-designed for motion sensing in mobile terminals and free-fall data protection systems.

For engineers reviewing the LIS3L02AQ3TR datasheet, LIS3L02AQ3TR pinout, LIS3L02AQ3TR application, or LIS3L02AQ3TR equivalent, this page delivers verified mechanical interface details, calibrated sensitivity and offset behavior across temperature, self-test voltage change quantification, output impedance constraints for anti-aliasing filter design, and QFN-44 package layout guidance for PCB layout and signal integrity planning.

Technical Context

The LIS3L02AQ3TR employs a surface-micromachined silicon sensing element with anchored proof mass and capacitive half-bridge detection, coupled to a fully differential CMOS interface featuring correlated double sampling (CDS) to suppress 1/f noise and offset drift. Each axis uses dedicated sample-and-hold (S&H) stages operating at 66 kHz, enabling oversampling-based noise reduction.

Its analog outputs (V_outx, V_outy, V_outz) are ratiometric to V_dd (2.4–3.6 V), with factory-trimmed zero-g level (V_off = V_dd/2 ±6%) and sensitivity (So = V_dd/5 V/g @ ±2g, V_dd/15 V/g @ ±6g). Self-test activation (ST pin = logic high) induces a defined capacitive deflection, yielding measurable output voltage shifts (e.g., ±50 mV on Y/Z axes at 3.3 V, ±2g range).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.4 V to 3.6 V - supports battery-powered operation with minimal regulation overhead
Full-Scale Range	±2 g or ±6 g (FS pin logic-controlled) - enables dynamic range selection for low-g precision or high-g shock tolerance
Bandwidth	1.5 kHz (mechanical resonance); configurable down via external RC filter - allows anti-aliasing tailoring per application
Output Impedance	80–140 kΩ (typ. 110 kΩ) - defines minimum load capacitance (≥320 pF) for stable low-pass filtering
Self-Test Output Shift	±50 mV (Y/Z), −50 mV (X) at 3.3 V, ±2g - provides deterministic electrical verification of sensor path integrity
Zero-g Level Drift	±0.8 mg/°C - enables accurate tilt measurement over industrial temperature range (−40°C to +85°C)
Current Consumption	0.85–1.5 mA active; 2–5 µA in power-down - extends battery life in portable devices during idle periods

Pinout & Package

Package: QFN-44 (7 mm × 7 mm × 1.8 mm, lead-free, green compliant), exposed thermal pad, 0.5 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
4 GND	Ground reference	Primary 0 V return for analog and digital circuitry; must be low-impedance connection to minimize noise coupling
5 Vdd	Power supply input	Single 2.4–3.6 V supply powering both sensing element and interface; requires local 100 nF + 10 µF decoupling
6 Vouty	Analog output (Y-axis)	Ratiometric voltage proportional to Y-acceleration; output impedance ~110 kΩ dictates RC filter design
7 ST	Self-test control input	Logic high activates internal electrostatic test force; output shift validates mechanical and signal chain functionality
8 Voutx	Analog output (X-axis)	Same ratiometric behavior as Vouty; polarity inverted vs. Vouty/Voutz for X-axis self-test response
14 PD	Power-down enable	Logic high places device in ultra-low-current mode (≤5 µA); wake-up time depends on C_load (T_on = 550·C_load + 0.3 ms)
15 Voutz	Analog output (Z-axis)	Enables vertical acceleration detection; critical for free-fall and orientation sensing in handheld devices
16 FS	Full-scale selection	Logic low selects ±2 g (higher resolution); logic high selects ±6 g (wider dynamic range for impact detection)

Key Features

Feature	Design Value
Factory-calibrated offset and sensitivity	Trim values stored in non-volatile memory; eliminates need for system-level calibration at power-on
Ratiometric analog outputs	V_off, S_o, and self-test ΔV scale linearly with V_dd; simplifies ADC reference matching and reduces supply ripple sensitivity
Embedded self-test	Deterministic output voltage shift (e.g., +50 mV on Y/Z) confirms mechanical integrity and signal chain functionality without external stimulus
Configurable bandwidth	External capacitor on each V_out pin sets low-pass cutoff (e.g., 100 nF → ~150 Hz); prevents aliasing and reduces broadband noise
High shock survivability	Withstands 10,000 g for 0.1 ms (unpowered) - suitable for drop-prone consumer electronics and industrial equipment

Applications

Mobile Device Free-Fall Detection

Gaming Motion Input

Use Scenario: Detecting sudden vertical acceleration loss in smartphones or tablets to trigger hard-disk park or screen lock before impact.

IC Role / Device Role / Timing Role: Analog 3-axis acceleration monitor providing real-time DC-coupled g-level data with <1.5 kHz bandwidth and sub-1 ms latency.

Use Value: Enables reliable, low-power free-fall recognition using factory-trimmed zero-g level (±6% of V_dd/2) and <0.5 mg resolution over 100 Hz bandwidth.

Use Scenario: Translating handheld controller tilt and gesture into game character movement or camera view adjustment.

IC Role / Device Role / Timing Role: Low-latency analog motion transducer feeding ADCs in microcontroller-based gaming peripherals.

Use Value: ±2g/±6g range selectability and ratiometric outputs ensure consistent responsiveness across varying battery voltages and lighting conditions.

Appliance Vibration Monitoring

Robotics Inertial Stabilization

Use Scenario: Monitoring washing machine drum imbalance or HVAC fan vibration to trigger fault alerts or adaptive speed control.

IC Role / Device Role / Timing Role: Industrial-grade analog accelerometer operating continuously over −40°C to +85°C with <±0.8 mg/°C zero-g drift.

Use Value: High shock survivability (10,000 g) and ECO-PACK compliance support long-term reliability in harsh mechanical environments.

Use Scenario: Providing pitch/yaw feedback for quadcopter attitude estimation or robotic arm end-effector stabilization.

IC Role / Device Role / Timing Role: Precision 3-axis inertial sensor supplying calibrated analog signals to embedded motion fusion algorithms.

Use Value: Correlated double sampling and 50 µg/√Hz noise density enable stable closed-loop control without requiring external digital filtering.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADXL335	Wider supply range (1.8–3.6 V); higher noise density (300 µg/√Hz); no self-test or power-down	Lacks integrated diagnostics; requires external voltage reference for stable scaling; less suitable for battery-constrained systems	Choose when lowest BOM cost is prioritized over diagnostic capability and ultra-low-power modes
LIS331DLH	Digital I²C/SPI output; lower current (300 µA active); ±2g/±4g/±8g ranges; built-in FIFO and interrupt engine	Requires host MCU with digital interface; better for event-driven wake-up but adds firmware complexity	Prefer when system already uses digital sensors and needs programmable thresholds or motion detection interrupts

Compared with ADXL335 and LIS331DLH, the LIS3L02AQ3TR uniquely balances analog simplicity, factory calibration, self-test verifiability, and sub-2 mA active current-making it optimal for cost-sensitive, battery-aware designs needing guaranteed analog performance without digital interface overhead.

Availability

LIS3L02AQ3TR is available at Aetrix Electronics and suitable for mobile terminal free-fall detection, gaming motion input, and appliance vibration monitoring requiring stable component supply and long-term industrial temperature support.

Supply support for LIS3L02AQ3TR 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, delivering innovative solutions across automotive, industrial, and consumer markets with strong IP in MEMS and analog technologies.

The LIS3L02AQ3TR belongs to ST's legacy analog-output MEMS accelerometer family, engineered for applications demanding calibrated analog signals, low power, and mechanical robustness-prioritizing plug-and-play integration over digital configurability.

FAQ

What is the recommended external capacitor value for anti-aliasing filtering on Voutx/Vouty/Voutz?

ST specifies a minimum load capacitance of 320 pF per output to ensure stability and define the low-pass corner frequency. For a 150 Hz cutoff, use 10 nF (since f_t ≈ 1.45 µF / C_f). Larger capacitors reduce noise but increase turn-on time after power-down; always verify with actual board parasitics and ADC input impedance.

How does the self-test function validate sensor integrity?

The self-test applies an electrostatic force to the proof mass via the ST pin, inducing a known displacement that produces a predictable output voltage shift (e.g., +50 mV on Y-axis at 3.3 V, ±2g range). Measuring this shift confirms both mechanical mobility and analog signal chain gain/offset integrity without external motion.

Can the LIS3L02AQ3TR operate reliably at 2.4 V supply?

Yes-the device is fully specified from 2.4 V to 3.6 V. Sensitivity (So), zero-g level (V_off), and self-test ΔV scale ratiometrically with V_dd. At 2.4 V, ±2g sensitivity becomes ~480 mV/g (V_dd/5), and zero-g level centers near 1.2 V, maintaining functional accuracy across the entire range.

Why does the Z-axis sensitivity differ from X/Y axes in the datasheet?

The Z-axis sensing structure has different mechanical anchoring and capacitive coupling geometry, resulting in lower nominal sensitivity (0.62–0.69 V/g vs. 0.64–0.70 V/g for X/Y at 3.3 V, ±2g). This is process-consistent and factory-trimmed; all axes meet ±1.5% nonlinearity and ±2% cross-axis sensitivity specs for reliable 3D vector reconstruction.

LIS3L02AQ3TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 44-QFN

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Analog

Axis:: X, Y, Z

Acceleration Range:: ±2g, 6g

Sensitivity (LSB/g):: -

Sensitivity (mV/g):: 660 (±2g) ~ 220 (±6g)

Bandwidth:: 1.5kHz

Output Type:: Analog Voltage

Voltage - Supply:: 2.4V ~ 3.6V

Features:: Adjustable Bandwidth, Selectable Low Pass Filter, Selectable Scale

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 44-QFN-EP (7x7)

LIS3L02AQ3TR FAQ

1.How can I place an order for LIS3L02AQ3TR through Aetrix?

Please submit a Request for Quotation (RFQ) for LIS3L02AQ3TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LIS3L02AQ3TR reliable?

The price and inventory of LIS3L02AQ3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LIS3L02AQ3TR is usually 5 days.

3.What payment methods are accepted for LIS3L02AQ3TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LIS3L02AQ3TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LIS3L02AQ3TR?

LIS3L02AQ3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LIS3L02AQ3TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LIS3L02AQ3TR?

For technical support, including LIS3L02AQ3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LIS3L02AQ3TR requirements.

6.How does Aetrix verify that LIS3L02AQ3TR is sourced from the original manufacturer or authorized distributors?

All LIS3L02AQ3TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LIS3L02AQ3TR meets industry standards.

7.What is the process for return or replacement of LIS3L02AQ3TR?

All LIS3L02AQ3TR units undergo pre-shipment inspection (PSI). If there is an issue with LIS3L02AQ3TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LIS3L02AQ3TR part is unused and in its original packaging.

Return procedure for LIS3L02AQ3TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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