STMicroelectronics LPY4150ALTR

Overview

LPY4150ALTR from STMicroelectronics is a dual-axis MEMS gyroscope measuring angular rate along pitch and yaw axes with ±1500 dps full-scale range, analog absolute-rate outputs (1× and 4× amplified), 140 Hz bandwidth, and operation from 2.7 V to 3.6 V across –40 °C to +85 °C - used in motion-sensing pointing devices and gaming controllers.

For engineers reviewing the LPY4150ALTR datasheet, LPY4150ALTR pinout, LPY4150ALTR application, or LPY4150ALTR equivalent, key selection considerations include dual-axis analog output scaling, embedded self-test and sleep mode control, temperature-stable zero-rate level (±0.25 dps/°C drift), and LGA-28 package compatibility with high-shock industrial environments.

Technical Context

The LPY4150ALTR integrates a single micromachined driving mass operating on the Coriolis principle, with CMOS signal conditioning delivering two independent analog voltage outputs per axis (OUTX/OUTZ and 4xOUTX/4xOUTZ). Its internal PLL synchronizes drive and sense interfaces, while embedded low-pass filtering supports configurable bandwidth up to 140 Hz.

It features three programmable power modes - normal, sleep (2.1 mA), and power-down (1–5 µA) - controlled via dedicated ST and SLEEP/PD pins. The device includes an integrated high-pass filter reset (HP) input and factory-trimmed reference voltage (Vref = 1.5 V) for stable DC biasing of analog outputs.

Key Specifications

Pinout & Package

LGA-28 (4 mm × 5 mm × 1 mm) land grid array package with exposed thermal pad; RoHS-compliant ECOPACK® construction qualified per JEDEC J-STD-020 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 ADXRS649YZ and LPY4250ALTR, the LPY4150ALTR uniquely balances dual-axis analog immediacy, ±1500 dps precision, and ultra-low-power sleep mode - making it optimal for battery-constrained motion UIs where latency, simplicity, and thermal stability are prioritized over raw range or digital bus compatibility.

Availability

LPY4150ALTR is available at Aetrix Electronics and suitable for gaming peripherals, industrial HMIs, robotics end-effectors, and smart-TV pointing devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LPY4150ALTR 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 LPY4150ALTR belongs to ST's MEMS motion sensor product line, designed specifically for high-reliability, low-power analog angular rate sensing in human-interface and motion-control applications - leveraging ST's proprietary LGA packaging and Coriolis-based micromachining expertise.

FAQ

What is the function of the HP pin on the LPY4150ALTR?

The HP (High-Pass Filter Reset) pin resets an optional external high-pass filter by applying 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 rotations to maintain baseline integrity.

How do I configure the LPY4150ALTR for lowest power consumption?

Drive the SLEEP/PD pin high (≥0.8×Vdd) to enter power-down mode, drawing only 1–5 µA. In this state, all internal circuitry except bias references is disabled. To resume operation, pull SLEEP/PD low and allow ≥10 ms for internal PLL lock and output stabilization before reading valid data.

Can both amplified and non-amplified outputs be used simultaneously on the same axis?

No. For each axis (X or Z), either the non-amplified output (OUTX/OUTZ) or the 4× amplified output (4xOUTX/4xOUTZ) should be used - not both concurrently. Using both introduces undefined interaction between internal amplifiers and output buffers, risking signal distortion or increased noise.

What is the purpose of the VCONT and FILTVDD pins?

VCONT and FILTVDD form part of the PLL loop filter network. External RC components connected between these pins set the PLL bandwidth and phase margin, ensuring stable oscillation of the internal drive frequency. Incorrect values cause erratic output or failure to lock - refer to Figure 3 in ST's Doc ID 16581 for exact resistor/capacitor values.