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

STMicroelectronics LIS3L02AQ

Name: LIS3L02AQ
Brand: STMicroelectronics
SKU: LIS3L02AQ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LIS3L02AQ

Manufacturer:: STMicroelectronics

Category:: Accelerometers

Package:: 44-QFN

Datasheet:: LIS3L02AQ.pdf

Description:: ACCELEROMETER 2-6G ANALOG 44QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LIS3L02AQ from STMicroelectronics is a low-power, analog-output, three-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 embedded self-test functionality. It operates from 2.4 V to 3.6 V, features factory-trimmed sensitivity and offset, and is specified for -40°C to +85°C in QFN-44 package - deployed in motion-activated mobile functions and free-fall data protection systems.

For engineers reviewing the LIS3L02AQ datasheet, LIS3L02AQ pinout, LIS3L02AQ application, or LIS3L02AQ equivalent, key selection considerations include its analog ratiometric output architecture, axis-specific bandwidth (4.0 kHz X/Y, 2.5 kHz Z), power-down mode (5 µA), self-test logic interface (ST pin), and full-scale selection via FS pin - all critical for inertial sensing in space-constrained embedded systems.

Technical Context

The LIS3L02AQ integrates a THELMA-process silicon MEMS sensing element with a CMOS interface IC featuring correlated double sampling (CDS) to suppress 1/f noise and offset drift. Its fully differential signal path feeds three independent sample-and-hold (S&H) circuits operating at 66 kHz, enabling oversampling-based noise reduction.

Output offset and sensitivity are ratiometric to Vdd - scaling linearly with supply voltage - which eliminates supply-induced error in downstream ADC stages. The device supports configurable bandwidth via external load capacitance (Cload ≤ 320 pF) and includes dedicated logic pins for self-test (ST), power-down (PD), and full-scale selection (FS).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.4 V to 3.6 V - enables direct interface with 3.3 V microcontroller I/O domains without level-shifting.
Full-Scale Range	±2 g or ±6 g (FS pin logic-controlled) - allows dynamic range optimization per application: low-g precision (e.g., tilt) vs. high-g shock detection.
Resolution	0.5 mg over 100 Hz BW - supports sub-degree inclination measurement with 12-bit-equivalent effective resolution.
Bandwidth	X/Y: 4.0 kHz; Z: 2.5 kHz - sufficient for vibration monitoring and impact detection up to audio frequencies.
Self-Test Output Delta	±20–50 mV (FS=2g) - provides deterministic electrical verification of sensor integrity without mechanical stimulus.
Power-Down Current	2–5 µA - extends battery life in portable devices during idle periods while retaining configuration state.
Output Impedance	80–140 kΩ - requires high-input-impedance ADC or buffer stage to avoid signal attenuation.

Pinout & Package

Package: QFN-44 (7 mm × 7 mm × 1.8 mm), exposed thermal pad, RoHS-compliant surface-mount package with 0.5 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
4 GND	Ground reference	Primary analog/digital return path; must be low-impedance and connected to PCB ground plane.
5 Vdd	Power supply input	Supplies both MEMS sensing element and CMOS interface; requires local 100 nF decoupling.
6 Vouty	Analog Y-axis output	Ratiometric single-ended voltage (Vdd/5 @ 2g full-scale); drives high-Z ADC inputs directly.
7 ST	Self-test control input	Logic 1 activates internal electrostatic actuation; output delta confirms sensor path integrity.
8 Voutx	Analog X-axis output	Identical ratiometric behavior to Vouty; enables synchronous 2-axis acquisition with shared Vdd reference.
14 PD	Power-down enable	Logic 1 places device in ultra-low-current state; wake-up time = 550×Cload + 0.3 ms.
15 Voutz	Analog Z-axis output	Same ratiometric scaling; lower bandwidth (2.5 kHz) reflects mechanical resonance constraints of vertical axis.
16 FS	Full-scale selection	Logic 0 = ±2 g; Logic 1 = ±6 g - configures internal gain and range before power-on or during operation.

Key Features

Feature	Design Value
THELMA MEMS process	Enables robust, wafer-level batch-manufactured silicon accelerometers with high shock survivability (10,000 g).
Correlated Double Sampling (CDS)	Reduces 1/f noise and offset drift in analog front-end, improving DC stability for static tilt sensing.
Ratiometric output architecture	Output voltage scales linearly with Vdd, eliminating supply rail variation errors in ADC conversion chains.
Factory-trimmed calibration	Non-volatile trimming parameters loaded at power-up - no host MCU calibration required for basic operation.
Configurable bandwidth	External Cload sets cutoff frequency per axis (f_c = 1/(2π·110 kΩ·C_load)), supporting adaptive filtering.

Applications

Mobile Motion Activation

Gaming Input Devices

Use Scenario: Detecting screen orientation changes and gesture-based UI commands in smartphones and tablets.

IC Role / Device Role / Timing Role: Analog 3-axis acceleration transducer providing real-time orientation vector for OS-level rotation handling.

Use Value: Enables seamless portrait/landscape switching and shake-to-undo with <100 ms latency and ±2g range optimized for human-hand motion.

Use Scenario: Translating physical controller tilt and shake into game character movement or camera control.

IC Role / Device Role / Timing Role: Low-latency analog inertial sensor feeding MCU ADC for real-time motion mapping.

Use Value: Delivers 0.5 mg resolution and 4 kHz X/Y bandwidth to capture rapid wrist flicks and subtle tilts without aliasing.

Free-Fall Data Protection

Appliance Control & Robotics

Use Scenario: Triggering hard disk head parking or SSD write-protection when laptop detects sudden vertical drop.

IC Role / Device Role / Timing Role: High-reliability inertial monitor detecting ≥2g sustained downward acceleration over 10–50 ms window.

Use Value: Uses factory-trimmed offset and ratiometric output to maintain detection threshold accuracy across Vdd and temperature variations.

Use Scenario: Monitoring door slam force, washing machine drum imbalance, or robotic joint acceleration feedback.

IC Role / Device Role / Timing Role: Analog acceleration monitor interfaced to industrial-grade microcontroller ADC for closed-loop control.

Use Value: ±6g full-scale mode (FS=1) captures high-magnitude transient events like impact or motor startup surges.

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog-output 3-axis 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 embedded self-test.	Lacks ST pin; requires external test stimulus; better suited for cost-sensitive, non-safety-critical tilt sensing.	Select ADXL335 if self-test is unnecessary and wider Vdd tolerance is prioritized over resolution.
LIS331DLH	Digital (I²C/SPI) output, 10-bit resolution, integrated FIFO, lower power (7 µA in LP mode), no analog outputs.	Requires digital interface and firmware parsing; eliminates need for external ADC but adds protocol overhead.	Select LIS331DLH when system already uses digital sensors and firmware can manage packetized data streams.

Compared with ADXL335 and LIS331DLH, the LIS3L02AQ uniquely delivers ratiometric analog outputs with embedded self-test and factory calibration - making it optimal for analog-centric designs requiring deterministic hardware-level validation and minimal MCU resource usage.

Availability

LIS3L02AQ is available at Aetrix Electronics and suitable for motion-activated mobile terminals, free-fall data protection systems, and appliance control applications requiring stable component supply and legacy-compatible inertial sensing.

Supply support for LIS3L02AQ 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 LIS3L02AQ belongs to ST's early-generation analog MEMS accelerometer family, engineered specifically for cost-sensitive, low-power embedded motion sensing where analog interface simplicity and hardware self-test reliability are primary design requirements.

FAQ

What is the function of the FS pin on the LIS3L02AQ?

The FS (Full-Scale) pin selects the device's measurement range: logic low (≤0.8 V) configures ±2 g, and logic high (≥2.2 V) configures ±6 g. This setting adjusts internal gain and determines output voltage scaling (Vdd/5 for 2g, Vdd/15 for 6g), enabling dynamic range adaptation without changing external circuitry.

How does the ratiometric output benefit system design?

The LIS3L02AQ's output voltage, offset, and sensitivity scale linearly with Vdd, so when used with an ADC referenced to the same supply, supply voltage variations cancel out. This eliminates the need for separate voltage references or post-conversion compensation algorithms, simplifying signal chain design and improving long-term measurement stability.

Can the LIS3L02AQ operate at 1.8 V?

No - the absolute minimum supply voltage is 2.4 V per datasheet specifications. Operation below 2.4 V risks undefined behavior, including failure to power the MEMS element or CMOS interface, loss of ratiometric accuracy, and inability to meet timing or self-test specifications. Systems requiring 1.8 V operation should consider newer alternatives like the LIS3DH.

What is the purpose of the reserved pins (e.g., pins 17–18, 20, 22–23, 26–28)?

These pins are reserved for internal test, future feature expansion, or die-package alignment and must be left unconnected unless explicitly directed otherwise in ST's application notes. Connecting them to Vdd or GND may cause unpredictable behavior; pin 26 is optionally tied to Vdd or GND per layout guidance, but all others require floating or NC termination per datasheet Figure 3.

LIS3L02AQ Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 44-QFN

Packaging:: Tray

Product Status:: Obsolete

Type:: Analog

Axis:: X, Y, Z

Acceleration Range:: ±2g, 6g

Sensitivity (LSB/g):: -

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

Bandwidth:: 4kHz (X,Y), 2.5kHz (Z)

Output Type:: Analog Voltage

Voltage - Supply:: 2.4V ~ 3.6V

Features:: Adjustable Bandwidth, Selectable Scale

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

LIS3L02AQ FAQ

1.How can I place an order for LIS3L02AQ through Aetrix?

Please submit a Request for Quotation (RFQ) for LIS3L02AQ 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 LIS3L02AQ reliable?

The price and inventory of LIS3L02AQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LIS3L02AQ is usually 5 days.

3.What payment methods are accepted for LIS3L02AQ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LIS3L02AQ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LIS3L02AQ?

LIS3L02AQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LIS3L02AQ 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 LIS3L02AQ?

For technical support, including LIS3L02AQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LIS3L02AQ requirements.

6.How does Aetrix verify that LIS3L02AQ is sourced from the original manufacturer or authorized distributors?

All LIS3L02AQ 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 LIS3L02AQ meets industry standards.

7.What is the process for return or replacement of LIS3L02AQ?

All LIS3L02AQ units undergo pre-shipment inspection (PSI). If there is an issue with LIS3L02AQ, 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 LIS3L02AQ part is unused and in its original packaging.

Return procedure for LIS3L02AQ:

1.Submit a request within 90 days.

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

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