STMicroelectronics LPY403AL

Overview

LPY403AL from STMicroelectronics is a dual-axis MEMS gyroscope measuring angular rate along pitch and yaw axes with ±30 dps full-scale range, 140 Hz bandwidth, and analog voltage outputs (amplified and non-amplified) for both axes. It operates from 2.7 V to 3.6 V over −40 °C to +85 °C and is used in image stabilization for digital video cameras and motion-controlled user interfaces.

For engineers reviewing the LPY403AL datasheet, LPY403AL pinout, LPY403AL application, or LPY403AL equivalent, key selection considerations include its dual-axis analog output architecture, embedded self-test and sleep/power-down modes, temperature-stable sensitivity (33.3 mV/dps amplified), and LGA-28 package compatibility with high-shock industrial environments.

Technical Context

The LPY403AL integrates a single micromachined driving mass oscillating continuously and reacting via Coriolis force to applied angular rates on pitch (X) and yaw (Z) axes. Its CMOS interface IC conditions signals and delivers two independent analog outputs per axis - one unamplified (±120 dps FS, 8.3 mV/dps), one 4× amplified (±30 dps FS, 33.3 mV/dps).

It embeds low-pass filtering (140 Hz −3 dB bandwidth), optional external high-pass filter reset (HP pin), PLL-based drive/sense synchronization (requiring external RC network on VCONT/FILTVDD), and configurable operating modes (normal, sleep, power-down, self-test) controlled by ST and SLEEP/PD pins.

Key Specifications

Pinout & Package

The LPY403AL is housed in a plastic land grid array (LGA-28) package measuring 4 mm × 5 mm × 1 mm, optimized for surface-mount assembly and high-density PCB layouts. The package is ECOPACK® RoHS-compliant and qualified per JEDEC J-STD-020 for soldering reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPY410AL and ADXRS450, the LPY403AL uniquely balances ±30 dps precision, dual-axis analog integration in compact LGA-28, and ultra-low power sleep mode-making it optimal for battery-powered image stabilization and motion UI where resolution, size, and quiescent current are critical.

Availability

LPY403AL is available at Aetrix Electronics and suitable for image stabilization in digital video cameras, motion-controlled user interfaces, and industrial robotics requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for LPY403AL 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, serving automotive, industrial, and consumer markets.

The LPY403AL belongs to ST's MEMS motion sensor product line, designed specifically for high-accuracy, low-power analog angular rate measurement in compact portable and industrial systems.

FAQ

What is the function of the HP pin on the LPY403AL?

The HP (High-Pass Filter Reset) pin is an active-high logic input that resets the optional external high-pass filter. When driven high, it clears accumulated DC offset in the filter path, enabling faster transient response-especially critical after power-up or during overload recovery. It must be pulsed high briefly at startup or after large angular excursions to maintain baseline stability.

How do I configure the LPY403AL for power-down mode?

To enter power-down mode, drive the SLEEP/PD pin to Vdd (logic high) while keeping the ST pin at GND (logic low). In this state, supply current drops to 1–5 µA, all internal circuitry halts except basic biasing, and outputs go to high-impedance. Wake-up requires toggling SLEEP/PD low and allowing ~10 ms stabilization before reading valid data.

Can I use only the non-amplified outputs (OUTX/OUTZ) without connecting 4xIN pins?

No. If using only OUTX or OUTZ, pins 5 (4xIN Z) and 16 (4xIN X) must be tied to Vref (1.5 V) to disable the internal 4× amplifier stage and prevent undefined behavior. Leaving them floating violates the absolute maximum ratings and may cause output instability or increased noise.

What external components are required for stable operation?

Required external components include: (1) 100 nF ceramic + 10 µF aluminum decoupling capacitors near Vdd/GND; (2) RC network on VCONT and FILTVDD pins (per Figure 3 in datasheet) to set PLL loop filter characteristics; (3) optional external low-pass filter on 4xOUTX/4xOUTZ if tighter bandwidth than 140 Hz is needed; (4) pull-up/down resistors on ST and SLEEP/PD for defined logic states.