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STMicroelectronics EK3L02DQ

Name: EK3L02DQ
Brand: STMicroelectronics
SKU: EK3L02DQ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EK3L02DQ

Manufacturer:: STMicroelectronics

Category:: Sensor Evaluation Boards

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Datasheet:: EK3L02DQ.pdf

Description:: BOARD EVAL MEMS FOR LIS3L02DQ

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Inventory:3,692

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Product details

Overview

LIS3L02DQ from STMicroelectronics is a 3-axis ±2g digital output linear MEMS accelerometer with I²C/SPI interfaces, 12-bit resolution, and motion-triggered interrupt capability. It operates from 2.7V to 3.6V, features 1.8V-compatible I/Os, embedded self-test, and is factory-trimmed for offset and sensitivity across -20°C to +70°C. Used in mobile device tilt sensing, anti-theft motion detection, and gaming input systems.

For engineers reviewing the LIS3L02DQ datasheet, LIS3L02DQ pinout, LIS3L02DQ application, or LIS3L02DQ equivalent, key selection considerations include its dual-interface flexibility (I²C Fast Mode up to 400 kHz / SPI up to 8 MHz), programmable interrupt threshold, RDY/INT signal timing behavior, and QFN-44 package thermal and mechanical shock survivability (10,000g/0.1ms).

Technical Context

The LIS3L02DQ integrates a surface-micromachined capacitive sensing element with three independent ΣΔ ADCs and reconstruction filters, delivering digitized acceleration data at selectable output rates from 280 Hz to 4.48 kHz via decimation factor configuration. Its analog front-end includes low-noise charge amplifiers operating at 107.5 kHz and 35.8 kHz.

Factory calibration stores trimming values for gain, offset, common mode, and internal clock frequency in non-volatile memory, enabling plug-and-play operation without user calibration. The device supports inertial wake-up via configurable threshold detection on any axis, with interrupt assertion on the RDY/INT pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Acceleration Range	±2.0 g - Full-scale range optimized for motion detection and orientation sensing in portable electronics.
Resolution	12-bit - Provides 4096 discrete output levels; 1 LSB = 0.97 mg for precise low-g motion discrimination.
Output Data Rate	280–4480 Hz - Configurable via decimation factor (8–128); enables trade-off between bandwidth and power consumption.
Supply Voltage	2.7 V to 3.6 V - Single supply operation compatible with Li-ion battery systems and 3.3 V logic rails.
I/O Voltage	1.8 V compatible - Allows direct interfacing with low-voltage microcontrollers without level shifters.
Self-Test Output Change	+100 to +400 LSB (X), –100 to –400 LSB (Y/Z) - Linear, voltage-ratiometric response confirms mechanical and signal chain integrity.
Zero-g Offset Drift	±0.8 LSB/°C - Low temperature coefficient ensures stable baseline over industrial ambient range.

Pinout & Package

Package: QFN-44, 7 mm × 7 mm × 1 mm, lead-free and RoHS-compliant (ECO-PACK®). Exposed thermal pad recommended for PCB grounding and thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
3, 22	GND	Dedicated ground connections for analog and digital domains; must be tied together at single-point star ground.
4, 21	Vdd	Main core supply (2.7–3.6 V); requires local 100 nF ceramic + 10 µF aluminum decoupling per supply pin.
20	Vdd_IO	Independent I/O supply (1.8 V to Vdd+0.1 V); enables voltage-level flexibility for host MCU interface.
15	RDY/INT	Open-drain interrupt output; asserts low on data-ready or programmable motion threshold exceedance.
16	SDO	SPI serial data output only; tri-stated in I²C mode; requires pull-up when used as general-purpose output.
17	SDA/SDI/SDO	Multi-function pin: I²C bidirectional SDA, SPI SDI (input), or 3-wire SDO (output) - mode selected by CS state and CTRL_REG2.
18	SCL/SPC	Multi-function clock: I²C SCL or SPI SPC; driven by host; no internal pull-up required in SPI mode.
19	CS	SPI enable / I²C mode select: high = I²C mode (SDO floating, SDA bidirectional); low = SPI mode.

Key Features

Feature	Design Value
Embedded Self-Test	Electrostatic actuation verifies MEMS structure integrity and signal chain functionality without external equipment.
Programmable Interrupt Threshold	Configurable per-axis acceleration threshold enables selective wake-up and reduces host polling overhead.
Dual Serial Interface	Single-pin-mapped I²C (400 kHz Fast Mode) and SPI (up to 8 MHz) support flexible integration with diverse MCUs.
Factory Calibration	Non-volatile trimming of offset, sensitivity, and clock frequency eliminates need for system-level calibration.
High Shock Survivability	Rated for 10,000g/0.1ms mechanical shock - suitable for handheld devices subject to drop impact.

Applications

Mobile Device Tilt Sensing

Anti-Theft Motion Detection

Use Scenario: Detecting orientation changes (portrait/landscape) and screen rotation in smartphones and tablets.

IC Role / Device Role / Timing Role: Primary 3-axis orientation sensor providing real-time acceleration vectors to application processor.

Use Value: 12-bit resolution and ±2g range deliver sub-degree tilt accuracy; RDY/INT pin synchronizes data reads with motion events.

Use Scenario: Triggering alarm or GPS reporting when unauthorized movement exceeds threshold in parked vehicles or secured assets.

IC Role / Device Role / Timing Role: Low-power inertial wake-up sensor that exits standby only upon motion detection.

Use Value: 15 µA power-down current and programmable interrupt threshold minimize battery drain while ensuring reliable event capture.

Gaming Input Devices

Vibration Monitoring Systems

Use Scenario: Translating hand gestures and controller tilt into game actions in motion-controlled consoles and VR peripherals.

IC Role / Device Role / Timing Role: Real-time motion capture sensor feeding raw acceleration data to host MCU at up to 4.48 kHz.

Use Value: 4.48 kHz maximum output rate and low latency (<6 ms turn-on time) enable responsive gesture recognition.

Use Scenario: Measuring low-amplitude structural vibrations in industrial machinery or HVAC systems for predictive maintenance.

IC Role / Device Role / Timing Role: Precision DC-coupled acceleration transducer capturing static and dynamic vibration components.

Use Value: ±0.3% FS non-linearity (X/Y) and ±0.6% FS (Z) ensure accurate amplitude fidelity for spectral analysis.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-axis ±2g digital accelerometer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LIS3DH	Wider supply range (1.71–3.6 V), lower power (1 µA in power-down), integrated FIFO, but QFN-16 package.	Better suited for ultra-low-power wearable designs requiring burst-mode sampling and motion buffering.	Select if system-level power budget <10 µA in sleep or FIFO-based data aggregation is required.
ADXL345	Same ±2g range and I²C/SPI interface, but 13-bit resolution, higher noise density (4 mg/√Hz), and different interrupt architecture.	Preferred in legacy industrial control systems where Analog Devices ecosystem integration is established.	Select if existing firmware uses ADXL345 register map or requires higher-resolution static tilt measurement.

Compared with LIS3L02DQ, LIS3DH offers superior power efficiency and smaller footprint but lacks QFN-44 mechanical robustness; ADXL345 provides broader vendor support but trades off shock survivability and factory calibration stability.

Availability

LIS3L02DQ is available at Aetrix Electronics and suitable for motion-activated mobile terminals, anti-theft security systems, and gaming input peripherals requiring stable component supply and long-term production continuity.

Supply support for LIS3L02DQ 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 microcontrollers, sensors, power ICs, and automotive-grade components.

The LIS3L02DQ belongs to ST's MEMS inertial sensor product line, engineered specifically for cost-sensitive consumer electronics requiring high-shock reliability, factory-calibrated accuracy, and dual-interface flexibility in compact SMD packages.

FAQ

What is the function of the RDY/INT pin?

The RDY/INT pin serves dual purpose: it asserts low when new acceleration data is ready (RDY mode), or when programmed motion threshold is exceeded (INT mode). Its open-drain output requires an external pull-up resistor and can be configured via CTRL_REG1 register bits. In I²C mode, it operates as active-low interrupt; in SPI mode, it may also indicate data-ready status depending on configuration.

How does the self-test feature work electrically?

The self-test applies electrostatic force to the MEMS proof mass by switching internal reference voltages, inducing a known displacement. This generates a ratiometric output change: +100 to +400 LSB on X-axis, –100 to –400 LSB on Y/Z axes, proportional to Vdd. The test validates both mechanical integrity and analog signal chain functionality without external stimuli.

Can LIS3L02DQ operate with Vdd_IO = 1.8 V while Vdd = 3.3 V?

Yes - Vdd_IO may be independently set to 1.8 V while Vdd is at 3.3 V, enabling direct connection to 1.8 V logic families. However, SPI clock frequency is limited to 4 MHz under this condition (per Table 4), and all I/O pins (SDA/SDI/SDO, SCL/SPC, RDY/INT, CS) will be referenced to Vdd_IO for voltage thresholds.

What is the significance of the "Reserved" pins (13 and 14)?

Pins 13 and 14 are marked "Reserved" in the datasheet: Pin 13 should be left unconnected or tied to Vdd_IO; Pin 14 should be left unconnected or tied to GND. These pins have no defined electrical function and must not be used for signal routing, decoupling, or thermal relief. Connecting them incorrectly may affect internal biasing or ESD protection paths.

EK3L02DQ Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Box

Product Status:: Obsolete

Sensor Type:: Accelerometer, 3 Axis

Sensing Range:: ±2g

Interface:: I2C, Serial, SPI

Sensitivity:: 1024LSb/g

Voltage - Supply:: 2.7V ~ 3.6V

Embedded:: -

Contents:: Board(s)

Utilized IC / Part:: LIS3L02DQ

EK3L02DQ FAQ

1.How can I place an order for EK3L02DQ through Aetrix?

Please submit a Request for Quotation (RFQ) for EK3L02DQ 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 EK3L02DQ reliable?

The price and inventory of EK3L02DQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EK3L02DQ is usually 5 days.

3.What payment methods are accepted for EK3L02DQ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EK3L02DQ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for EK3L02DQ?

EK3L02DQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EK3L02DQ 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 EK3L02DQ?

For technical support, including EK3L02DQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EK3L02DQ requirements.

6.How does Aetrix verify that EK3L02DQ is sourced from the original manufacturer or authorized distributors?

All EK3L02DQ 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 EK3L02DQ meets industry standards.

7.What is the process for return or replacement of EK3L02DQ?

All EK3L02DQ units undergo pre-shipment inspection (PSI). If there is an issue with EK3L02DQ, 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 EK3L02DQ part is unused and in its original packaging.

Return procedure for EK3L02DQ:

1.Submit a request within 90 days.

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

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