STMicroelectronics LPR410ALTR

Overview

LPR410ALTR from STMicroelectronics is a dual-axis MEMS gyroscope measuring angular rate along pitch and roll axes with ±100 dps full-scale range, 140 Hz bandwidth, and analog outputs (amplified and non-amplified) for both axes; used in motion-controlled user interfaces and GPS navigation systems.

For engineers reviewing the LPR410ALTR datasheet, LPR410ALTR pinout, LPR410ALTR application, or LPR410ALTR equivalent, this page delivers verified mechanical and electrical specifications, validated pin functions, confirmed operating modes (normal/sleep/power-down/self-test), and real-world integration guidance for motion-sensing designs.

Technical Context

The LPR410ALTR integrates a single micromachined driving mass operating on the Coriolis principle, with a CMOS interface IC providing analog voltage outputs proportional to angular rate. It features embedded low-pass filtering (140 Hz -3 dB bandwidth) and optional external high-pass filter reset via HP pin.

Power management is implemented through dedicated SLEEP/PD and ST pins, enabling four distinct operational states: normal, sleep (2.1 mA), power-down (5 µA), and self-test. The device uses a PLL-based sensing architecture synchronized via VCONT and FILTVDD pins with external RC components.

Key Specifications

Pinout & Package

LPR410ALTR is housed in a plastic land grid array (LGA-28) package measuring 4 mm × 5 mm × 1 mm, optimized for surface-mount assembly and mechanical shock survivability (up to 3000 g).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXRS645 and LPY410AL, the LPR410ALTR uniquely delivers dual-axis analog outputs in one LGA-28 package with integrated power modes and self-test-enabling compact, low-BOM-count motion interfaces without external ADC or digital processing overhead.

Availability

LPR410ALTR is available at Aetrix Electronics and suitable for GPS navigation systems, motion tracking wearables, pointing devices, and motion-controlled user interfaces requiring stable component supply across industrial temperature ranges.

Supply support for LPR410ALTR 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 analog products for industrial, automotive, and consumer markets.

The LPR410ALTR belongs to ST's MEMS gyroscope product line, engineered specifically for cost-sensitive, low-power motion-sensing applications requiring analog output fidelity and robust mechanical performance in compact LGA packages.

FAQ

What is the function of the HP pin on the LPR410ALTR?

The HP (High-Pass Filter Reset) pin is an active-high logic input that resets any external high-pass filter connected to the device. Applying logic '1' to HP ensures faster transient response after power-up or during overload conditions by clearing accumulated DC offset in the external filter network. It must be driven from a clean digital source and is not internally pulled.

How do I configure the LPR410ALTR for power-down mode?

To enter power-down mode, drive the SLEEP/PD pin to Vdd while holding the ST pin at GND. In this state, supply current drops to 5 µA and all sensing and output circuitry is disabled. The device retains its configuration and resumes normal operation within microseconds upon returning SLEEP/PD to GND, with no recalibration needed.

Can I use only the non-amplified outputs (OUTX/OUTY) without connecting 4xINX/4xINY?

No - when using OUTX/OUTY, pins 5 (4xINX) and 16 (4xINY) must be biased to Vref (1.5 V) to prevent floating amplifier inputs. Leaving them unconnected causes undefined output behavior and increased noise. This biasing ensures proper common-mode operation of the internal amplifiers even when their outputs are unused.

What is the purpose of the VCONT and FILTVDD pins?

VCONT and FILTVDD are PLL filter nodes requiring external RC networks to stabilize the internal phase-locked loop that synchronizes the driving and sensing circuits. A typical configuration uses a 100 kΩ resistor from VCONT to FILTVDD and a 10 nF capacitor from FILTVDD to GND. Incorrect or missing components cause oscillation, output instability, or failure to start up reliably.