STMicroelectronics LPR503ALTR

Overview

LPR503ALTR from STMicroelectronics is a dual-axis MEMS gyroscope measuring angular rate along pitch and roll axes with ±30°/s full-scale range, 140 Hz bandwidth, and analog absolute angular-rate outputs (1× and 4× amplified per axis) for motion sensing in compact portable electronics. It operates from 2.7 V to 3.6 V, supports -40 °C to +85 °C operation, and integrates self-test, power-down, and embedded low-pass filtering.

For engineers reviewing the LPR503ALTR datasheet, LPR503ALTR pinout, LPR503ALTR application, or LPR503ALTR equivalent, this device is selected for precision analog angular-rate measurement where temperature stability, shock survivability, and dual-axis output flexibility are critical - especially in image stabilization and motion UI subsystems requiring DC-coupled rate sensing.

Technical Context

The LPR503ALTR implements a single micromachined structure combining one driving mass and Coriolis-based sensing elements for both X and Y axes. Its CMOS interface IC provides two independent analog output channels per axis - one unamplified (±120°/s FS), one 4× amplified (±30°/s FS) - each with dedicated low-pass filtering and configurable high-pass reset capability.

It uses an internal PLL synchronized to the mechanical resonator, requiring external RC components on FILTVDD and VCONT pins for loop stability. The device delivers factory-trimmed zero-rate level (1.23 V) and sensitivity (8.3 mV/°/s unamplified, 33.3 mV/°/s amplified), with <0.03 %/°C sensitivity drift and <0.01 °/s/°C zero-rate drift over temperature.

Key Specifications

Pinout & Package

LPR503ALTR is housed in a 5 mm × 5 mm × 1.5 mm plastic land grid array (LGA-16L) package with bottom-side solder pads and no exposed leads - optimized for automated reflow assembly and minimal PCB footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPY503ALTR and LSM330DLC, the LPR503ALTR uniquely delivers dual-axis analog rate outputs in a minimal 5×5 mm footprint with no digital interface overhead - making it optimal for cost-sensitive, low-latency, or MCU-ADC-limited motion sensing applications.

Availability

LPR503ALTR is available at Aetrix Electronics and suitable for image stabilization, motion-controlled user interfaces, and GPS dead reckoning requiring stable component supply across consumer electronics, automotive infotainment, and industrial portable equipment programs.

Supply support for LPR503ALTR 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, R&D, and sales operations across Europe, Asia, and the Americas.

The LPR503ALTR belongs to ST's MEMS motion sensor family designed specifically for high-volume consumer applications demanding analog-output simplicity, factory-trimmed accuracy, and robust mechanical packaging - particularly where optical stabilization and intuitive motion UI are key differentiators.

FAQ

What is the purpose of the HP pin on the LPR503ALTR?

The HP (High Pass Filter Reset) pin allows external logic control to discharge the capacitor in an optional external high-pass filter network. When driven high, it resets the filter's DC operating point - preventing output saturation during large angular transients or power-up. This feature is especially valuable in camera stabilization systems where sudden pan movements would otherwise cause temporary loss of tracking fidelity.

Can the LPR503ALTR operate from a 2.5 V supply?

No. The LPR503ALTR specifies a minimum supply voltage of 2.7 V per its absolute maximum ratings and electrical characteristics table. Operation below 2.7 V may result in undefined behavior, reduced sensitivity, or failure to activate internal regulators and PLL circuits. For 2.5 V systems, consider voltage regulation or alternative sensors explicitly rated down to 2.5 V.

How does the self-test function verify mechanical integrity?

The self-test applies an electrostatic force to the micromachined driving mass, inducing a known Coriolis-like displacement that produces a predictable DC-level shift in the analog outputs. When ST pin is pulled high, the output changes by a specified amplitude (e.g., ~100 mV at 3 V supply), confirming both mechanical resonance and signal chain functionality - eliminating need for physical rotation during production test.

Why are pins 14 and 15 labeled "Res" and tied to Vdd?

Pins 14 and 15 are reserved internal connections required for proper die biasing and ESD protection network integrity. ST's datasheet mandates connection to Vdd - not floating or grounded - to ensure stable operation and prevent latch-up or parametric shift. Leaving them unconnected violates the recommended land pattern and risks functional instability or premature failure.