STMicroelectronics LPR450AL

Overview

LPR450AL from STMicroelectronics is a dual-axis MEMS gyroscope measuring angular rate along pitch and roll axes with ±500 dps full-scale range, 140 Hz -3 dB bandwidth, and analog absolute-rate outputs (both 1× and 4× amplified). It operates from 2.7 V to 3.6 V across –40 °C to +85 °C and is used in motion-controlled pointing devices and game controllers.

For engineers reviewing the LPR450AL datasheet, LPR450AL pinout, LPR450AL application, or LPR450AL equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative options for motion-sensing system design.

Technical Context

The LPR450AL integrates a single micromachined driving mass oscillating continuously and responding via Coriolis effect to applied angular rates. Its CMOS interface IC provides factory-trimmed analog voltage outputs referenced to 1.5 V Vref, with non-ratiometric sensitivity (2 mV/dps for 4× output).

It embeds low-pass filtering (140 Hz cutoff), self-test actuation via electrostatic force, and configurable power modes-normal, sleep (2.1 mA), and power-down (1–5 µA)-controlled by dedicated ST and SLEEP/PD pins per Table 6.

Key Specifications

Pinout & Package

LPR450AL uses an LGA-28 (4 mm × 5 mm × 1 mm) land grid array package with exposed pad for mechanical stability and thermal dissipation. Pin layout follows ST's standardized LGA footprint for MEMS sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPY450AL, LPR450AL saves one device and PCB footprint for dual-axis needs; compared with LSM330DLC, it retains analog simplicity, lower latency, and direct ADC compatibility without protocol stack overhead.

Availability

LPR450AL is available at Aetrix Electronics and suitable for motion-controlled pointing devices, game controllers, industrial robotics, and human-machine interface systems requiring stable component supply and long-term manufacturability.

Supply support for LPR450AL 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 and R&D facilities across Europe, Asia, and the Americas.

LPR450AL belongs to ST's MEMS motion sensor product line, designed specifically for cost-sensitive, low-power consumer and industrial motion-sensing applications requiring analog output fidelity and robust mechanical performance.

FAQ

What is the purpose of the HP pin on the LPR450AL?

The HP (High-Pass Filter Reset) pin resets an optional external high-pass filter by applying a logic high. This action clears accumulated DC offset during overload or power-up events, ensuring rapid return to accurate rate measurement. It is recommended to assert HP at startup and after large transient inputs to maintain signal integrity in motion-tracking loops.

How do I configure the LPR450AL for power-down mode?

To enter power-down mode, drive the SLEEP/PD pin high (≥0.8×Vdd) while holding the ST pin low (≤0.2×Vdd), per Table 6. In this state, supply current drops to 1–5 µA and all analog outputs are disabled. Wake-up occurs within microseconds upon returning SLEEP/PD to low, with no reinitialization required.

Can I use only the 4× amplified outputs without external components?

Yes - 4xOUTX and 4xOUTY are internally buffered and provide low-impedance outputs. However, if using only amplified outputs, pins 1–5 (X path) and 16–20 (Y path) must be shorted respectively to route the signal through the amplifier. No external amplification is needed, but decoupling capacitors (100 nF + 10 µF) near Vdd remain mandatory.

What does the "NC" designation mean for multiple pins on the LPR450AL?

"NC" indicates internally not connected - these pins (e.g., pins 2–4, 6, 8, 10–13, 15, 18, 21, 23, 25) have no electrical function and must be left floating or tied to GND/Vdd only if required for mechanical stability or ESD protection per layout guidelines. They are not reserved for future features or test access.