STMicroelectronics LPR550AL

Overview

LPR550AL from STMicroelectronics is a dual-axis MEMS gyroscope measuring angular rate along pitch and roll axes with ±500°/s full-scale range, 140 Hz bandwidth, and analog absolute angular-rate outputs (both 1× and 4× amplified). It operates from 2.7 V to 3.6 V, supports -40 °C to +85 °C, and is used in motion-sensing user interfaces for gaming controllers and industrial robotics.

For engineers reviewing the LPR550AL datasheet, LPR550AL pinout, LPR550AL application, or LPR550AL equivalent, key selection considerations include its dual-axis analog output architecture, integrated self-test and power-down functions, temperature-stable zero-rate level (1.23 V), and LGA-16 package compatibility with high-shock environments.

Technical Context

The LPR550AL integrates a single micromachined driving mass operating on the Coriolis principle, with separate charge amplifiers and demodulators per axis. Its CMOS interface IC provides factory-trimmed analog voltage outputs referenced to 1.23 V, enabling direct ADC interfacing without external signal conditioning.

It embeds low-pass filtering (140 Hz −3 dB bandwidth), optional external high-pass filter reset via HP pin, and PLL-based actuation synchronization using FILTVDD/VCONT pins. Sensitivity drift is limited to 0.03 %/°C and zero-rate level drift to 0.08 °/s/°C over temperature.

Key Specifications

Pinout & Package

LPR550AL is housed in a 5 mm × 5 mm × 1.5 mm plastic land grid array (LGA-16) package with bottom-side solder pads and no exposed leads - optimized for compact PCB layouts and automated reflow assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-axis analog gyroscope applications.

Compared with ADXRS620 and LPY550AL, the LPR550AL uniquely delivers dual-axis analog outputs in one package with factory-trimmed zero-rate stability, eliminating axis alignment complexity and external signal conditioning - critical for responsive, low-latency motion interfaces.

Availability

LPR550AL is available at Aetrix Electronics and suitable for gaming controllers, industrial robotic joints, remote pointing interfaces, and autonomous mobile robot stabilization requiring stable component supply across extended temperature ranges and high-shock environments.

Supply support for LPR550AL 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, with manufacturing facilities across Europe, Asia, and the Americas, serving automotive, industrial, and consumer markets.

The LPR550AL belongs to ST's MEMS motion sensor product line, designed specifically for high-reliability analog angular rate measurement in motion-controlled human interfaces and industrial automation systems.

FAQ

What is the purpose of the HP pin on the LPR550AL?

The HP (High Pass Filter Reset) pin resets external high-pass filter capacitors by applying logic-high voltage. This clears accumulated DC offset during power-up or overload conditions, ensuring fast settling of the output baseline. It is recommended to assert HP at every power-on event to maintain accurate zero-rate tracking in motion applications.

How does the self-test function verify sensor integrity?

When ST pin is driven high, an electrostatic test force displaces the micromachined driving mass, generating a known Coriolis-like response. The resulting DC shift in 4xOUTX/4xOUTY (typically ~1.0 V) confirms both mechanical mobility and signal chain functionality - validating sensor health without external motion equipment.

Why are FILTVDD and VCONT pins required for external components?

FILTVDD and VCONT connect to an external RC network that stabilizes the internal PLL controlling the driving mass oscillation frequency. Without proper filtering (e.g., 1 MΩ + 4.7 µF on FILTVDD), PLL jitter increases, degrading angular rate accuracy and introducing noise into analog outputs.

Can the LPR550AL operate without external low-pass filtering?

Yes - the device includes an embedded 140 Hz low-pass filter. However, external filtering is recommended to suppress PCB noise and improve SNR. If unused, 4xOUTX/4xOUTY must be shorted to their respective 4xINX/4xINY pins; otherwise, output impedance mismatch causes gain error and instability.