STMicroelectronics LPR530ALTR

Overview

LPR530ALTR from STMicroelectronics is a dual-axis MEMS gyroscope measuring angular rate along pitch and roll axes, with ±300°/s full-scale range, 140 Hz bandwidth, and analog outputs (amplified and non-amplified per axis). 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 - used in motion-sensing user interfaces and GPS-aided navigation systems.

For engineers reviewing the LPR530ALTR datasheet, LPR530ALTR pinout, LPR530ALTR application, or LPR530ALTR equivalent, key selection considerations include dual-axis analog output scaling (0.83 mV/°/s and 3.33 mV/°/s), zero-rate level stability (1.23 V ±0.05 °/s/°C drift), LGA-16 package compatibility, and integrated PLL-based drive/sense synchronization.

Technical Context

The LPR530ALTR implements Coriolis-effect sensing using a single micromachined driving mass oscillating continuously; angular rotation induces orthogonal displacement detected by capacitive transduction. Its CMOS interface IC provides two independent analog output paths per axis - one direct (OUTX/OUTY) and one 4× amplified (4xOUTX/4xOUTY) - each with dedicated low-pass filtering.

It embeds a PLL circuit requiring external RC components on FILTVDD and VCONT pins for phase-locked actuation; high-pass filter reset (HP pin) enables dynamic DC offset recovery during overload or power-up. Self-test (ST pin) applies electrostatic force to verify mechanical integrity without external stimulus.

Key Specifications

Pinout & Package

LPR530ALTR is housed in a 5 mm × 5 mm × 1.5 mm plastic land grid array (LGA-16) package with bottom-side exposed pads and no leads - optimized for compact PCB layout and thermal performance in motion-sensing modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPY530ALTR and LSM6DS3TR, LPR530ALTR uniquely delivers true dual-axis analog output in a single LGA-16 package with configurable gain per axis - enabling deterministic latency, minimal external components, and direct ADC interfacing without protocol overhead.

Availability

LPR530ALTR is available at Aetrix Electronics and suitable for motion-sensing user interfaces, GPS-aided navigation systems, industrial robotics, and remote pointing devices requiring stable component supply across extended temperature ranges.

Supply support for LPR530ALTR 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 devices for industrial, automotive, and consumer markets.

LPR530ALTR belongs to ST's MEMS gyroscope product line, engineered specifically for high-stability, low-power angular rate measurement in motion-enabled human interface and navigation applications - leveraging ST's mature LGA-packaged sensor manufacturing platform.

FAQ

What is the purpose of the FILTVDD and VCONT pins?

FILTVDD and VCONT pins connect to an external RC network that sets the loop dynamics of the internal PLL, ensuring precise phase synchronization between the micromachined driving oscillator and the Coriolis sensing circuit. Incorrect component values cause instability or reduced sensitivity, so values must match ST's recommended 1 MΩ/4.7 µF (FILTVDD) and 33 kΩ/2.2 nF–2.2 µF (VCONT) configuration.

How does the self-test (ST) function verify sensor integrity?

When ST pin is driven high, an electrostatic force moves the internal seismic mass, generating a known Coriolis-equivalent output shift (~1.0 V change at 3 V supply). The resulting DC-level change on OUTX/OUTY or 4xOUTX/4xOUTY is compared against datasheet-specified amplitude tolerances - confirming both mechanical mobility and analog signal chain functionality without external motion.

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

Pins 14 and 15 are reserved mechanical and electrical tie-points within the LGA-16 structure - not functional signal pins. Connecting them to Vdd maintains uniform thermal expansion, prevents solder voiding under the die, and ensures mechanical reliability during reflow and board flex. Leaving them floating risks package warpage or interconnect failure.

Can LPR530ALTR operate without external low-pass filtering?

Yes - its internal low-pass filter provides fixed 140 Hz bandwidth. However, external filtering is recommended to suppress high-frequency noise before ADC sampling. If unused, 4xOUTX/4xOUTY outputs require shorting 4xINX to OUTX and 4xINY to OUTY; non-amplified outputs (OUTX/OUTY) should have 4xINX/4xINY tied to Vref or GND to prevent floating inputs and amplifier instability.