STMicroelectronics LPR550ALTR

Overview

LPR550ALTR 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, delivers high temperature stability (-40 °C to +85 °C), and integrates self-test, power-down, and low-pass filtering-used in motion-sensing game controllers and industrial robotics.

For engineers reviewing the LPR550ALTR datasheet, LPR550ALTR pinout, LPR550ALTR application, or LPR550ALTR equivalent, key selection criteria include its dual-axis analog output architecture, ±500°/s dynamic range, LGA-16 package compatibility, embedded self-test capability, and temperature-stable zero-rate level (1.23 V) for precision motion sensing in embedded systems.

Technical Context

The LPR550ALTR implements a Coriolis-effect-based sensing principle using a single micromachined driving mass oscillating continuously; angular rotation induces orthogonal displacement sensed as voltage. Its CMOS interface IC provides two independent analog output channels per axis-one unamplified (±2000°/s FS, 0.5 mV/°/s sensitivity) and one 4× amplified (±500°/s FS, 2 mV/°/s).

It embeds a PLL for driving/sensing synchronization, supports external high-pass filter reset via HP pin, and includes internal low-pass filtering (140 Hz −3 dB bandwidth). Power-down mode reduces current to ≤5 µA, and self-test applies electrostatic force to verify mechanical integrity without external stimulus.

Key Specifications

Pinout & Package

LPR550ALTR is housed in a 5 mm × 5 mm × 1.5 mm plastic land grid array (LGA-16) package with bottom-side exposed pads for thermal and mechanical stability. The package is RoHS-compliant, ECOPACK® certified, and qualified per JEDEC J-STD-020C for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADXRS620 and MPU-6050, LPR550ALTR offers native dual-axis analog outputs with minimal external components, embedded self-test for functional safety validation, and guaranteed −40 °C to +85 °C performance-making it optimal for cost-sensitive, low-latency motion interfaces where analog simplicity and robustness are prioritized.

Availability

LPR550ALTR is available at Aetrix Electronics and suitable for gaming peripherals, industrial robotics, pointing devices, and autonomous mobile robots requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LPR550ALTR 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/mixed-signal products for industrial, automotive, and consumer markets.

LPR550ALTR belongs to ST's MEMS motion sensor product line, engineered specifically for high-reliability, low-power angular rate measurement in space-constrained motion interfaces-leveraging mature LGA-packaged accelerometer manufacturing expertise.

FAQ

What is the difference between OUTX/OUTY and 4xOUTX/4xOUTY outputs?

OUTX and OUTY provide unamplified analog outputs with ±2000°/s full-scale range and 0.5 mV/°/s sensitivity, suited for high-dynamic-range applications. 4xOUTX and 4xOUTY deliver internally amplified signals with ±500°/s full-scale range and 2 mV/°/s sensitivity, optimized for higher resolution and direct ADC interfacing. Both pairs share the same zero-rate level (1.23 V) and temperature stability.

How does the self-test (ST) pin function, and what voltage levels activate it?

The ST pin activates self-test when driven to logic high (≥0.8×Vdd); at Vdd = 3.0 V, this means ≥2.4 V. In self-test mode, an electrostatic force displaces the sensing mass, causing a predictable DC-level shift in 4xOUTX/4xOUTY outputs (~±100 mV). A logic low (≤0.2×Vdd, or ≤0.6 V at 3.0 V) disables self-test and restores normal operation. No external components are needed.

Can LPR550ALTR operate without external filtering components?

Yes-the device includes an embedded low-pass filter with 140 Hz −3 dB bandwidth and requires no external components for basic operation. However, external low-pass or high-pass filters are recommended for noise suppression or AC-coupled applications. If using 4× amplified outputs, pins 4–5 and 9–10 must be shorted; if using only unamplified outputs, pins 5 and 9 should be tied to GND or Vref to prevent floating inputs.

What is the role of FILTVDD and VCONT pins, and what external components are required?

FILTVDD and VCONT form the PLL filter network that stabilizes the internal oscillator driving the micromachined mass. Per ST's application guidance, a 1 MΩ resistor and 4.7 µF capacitor connect between VCONT and GND, while a 33 kΩ resistor and 2.2 nF–2.2 µF capacitor connect between FILTVDD and GND. These values set PLL bandwidth and jitter performance; deviation may cause output instability or increased noise.