STMicroelectronics LIS302DLH

Overview

LIS302DLH from STMicroelectronics is a MEMS digital-output 3-axis accelerometer in the "piccolo" family, serving as an inertial motion sensor for handheld and portable electronics. It delivers ±2g/±4g/±8g dynamically selectable full-scale range, 16-bit output resolution, ultra-low-power operation down to 10 µA, and dual programmable interrupt outputs (INT1/INT2) for free-fall and motion detection - enabling intelligent power management in battery-constrained devices.

For engineers reviewing the LIS302DLH datasheet, LIS302DLH pinout, LIS302DLH application, or LIS302DLH equivalent, key selection criteria include its I²C/SPI dual-interface support, 0.5 Hz–1 kHz configurable output data rate, 6D orientation detection capability, embedded self-test function, and LGA-14 (3×5×0.8 mm) ultra-thin package suitable for space-constrained PCB layouts.

Technical Context

The LIS302DLH integrates a capacitive MEMS sensing element with a low-noise signal conditioning chain, 12-bit ADC (with 16-bit data register format), and digital control logic supporting both I²C (standard/fast mode) and SPI (3- or 4-wire) serial interfaces. Its interrupt generators are fully programmable via dedicated registers (INT1_CFG/INT2_CFG) for threshold, duration, and event type (motion, free-fall, 6D position).

Power management includes three operational modes: normal (250 µA), low-power (10 µA), and power-down (1 µA), with sleep-to-wake-up triggered by inertial events or timer-based wake cycles. The built-in high-pass filter enables zero-g offset cancellation and vibration rejection, while factory calibration ensures ±20 mg typical zero-g offset accuracy over −40 °C to +85 °C.

Key Specifications

Pinout & Package

LGA-14 (3 mm × 5 mm × 0.8 mm) land grid array package with bottom-terminal layout, optimized for automated assembly and minimal PCB footprint in ultra-thin mobile designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LIS302DLH, LIS3DSH trades I²C flexibility and ultra-low-power operation for higher bandwidth, while MMA8452Q emphasizes resolution and integrated FIFO at the expense of interrupt configurability and dual-interface support - making LIS302DLH optimal for balanced power/performance/portability in space-constrained portable electronics.

Availability

LIS302DLH is available at Aetrix Electronics and suitable for smartphone display orientation, pedometer activity tracking, free-fall protection in portable storage, and gaming motion input requiring stable component supply across high-volume production cycles.

Supply support for LIS302DLH 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 automotive, industrial, and consumer markets.

The "piccolo" accelerometer family - including LIS302DLH - was engineered specifically for ultra-low-power, space-constrained portable electronics, emphasizing thin-profile packaging, dual-protocol digital interfaces, and intelligent interrupt-driven operation to minimize host processor load.

FAQ

What is the minimum supply voltage required for reliable operation of the LIS302DLH?

The LIS302DLH operates reliably from 2.16 V to 3.6 V on Vdd and 1.71 V to (Vdd + 0.1 V) on Vdd_IO. Below 2.16 V, internal regulation fails and measurement accuracy degrades; operation at 2.16 V is validated per ST's electrical characteristics table and supports direct connection to partially discharged Li-ion cells.

How does the LIS302DLH handle I²C and SPI interface selection?

Interface selection is controlled solely by the CS pin: logic high selects I²C mode (SDA/SCL active), logic low selects SPI mode (SDI/SDO/SPC active). No register writes or power-cycle required - mode switching occurs dynamically, enabling runtime protocol reconfiguration in field-upgradable firmware.

Can the LIS302DLH detect orientation changes without host processor intervention?

Yes - its embedded 6D orientation detection engine compares normalized axis magnitudes against programmable thresholds and asserts INT1 or INT2 automatically upon position change. This offloads tilt-state evaluation from the MCU, reducing active CPU time and extending battery life in always-on orientation-aware applications.

What is the purpose of the reserved pins (Pin 3 and Pin 11) on the LGA-14 package?

Pin 3 must be connected to Vdd and Pin 11 to GND per ST's mechanical and layout guidelines. These connections stabilize internal reference nodes and ensure proper biasing of the MEMS sensing element; leaving them floating causes unpredictable offset drift and increased noise in output data.