STMicroelectronics LPS22HHTR

Overview

LPS22HHTR from STMicroelectronics is a high-performance MEMS nano barometric pressure sensor delivering 24-bit absolute digital pressure output over 260–1260 hPa range, with ±0.5 hPa absolute accuracy, 0.65 Pa RMS noise, and embedded temperature compensation. It operates from -40 °C to +85 °C on 1.7–3.6 V supply and supports SPI, I²C, and MIPI I3CSM interfaces for integration into portable altimeters, drone flight controllers, and weather station modules.

For engineers reviewing the LPS22HHTR datasheet, LPS22HHTR pinout, LPS22HHTR application, or LPS22HHTR equivalent, key selection considerations include its ultra-low 4 μA current draw at 1 Hz ODR, high shock survivability (22,000 g), holed HLGA-10L package enabling direct atmospheric access, and configurable FIFO with interrupt-driven pressure threshold detection.

Technical Context

The LPS22HHTR integrates a piezoresistive silicon sensing element with a dedicated ASIC for signal conditioning, digitization, and digital interface control. Its architecture includes dual-stage filtering (LPF + embedded low-noise mode), factory-trimmed TCO compensation (±0.65 Pa/°C), and independent pressure/temperature data paths with synchronized 24-bit/16-bit outputs.

All communication modes-SPI (4-wire/3-wire), I²C, and MIPI I3CSM-are mutually exclusive and selected via the CS pin logic level; the device implements hardware-based FIFO management (bypass, FIFO, continuous stream) and supports programmable pressure thresholds with interrupt generation on INT_DRDY.

Key Specifications

Pinout & Package

HLGA-10L is a 2.0 mm × 2.0 mm × 0.73 mm holed land grid array package with exposed cavity for direct atmospheric pressure access. Ten terminals are arranged in a 2×5 bottom-side layout; pins 3 and 8–9 are GND-connected for mechanical stability and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar barometric pressure sensor applications.

Compared with BMP388 and MS5637-02BA03, the LPS22HHTR delivers superior low-noise performance (0.65 Pa vs. ≥1.5 Pa), integrated FIFO for burst sampling, and MIPI I3CSM readiness - making it optimal for next-gen portable and UAV platforms demanding precision, power efficiency, and interface flexibility.

Availability

LPS22HHTR is available at Aetrix Electronics and suitable for drone flight control systems, portable weather stations, sport watch altimeters, and e-cigarette vapor sensing applications requiring stable component supply across extended production lifecycles.

Supply support for LPS22HHTR 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 devices for industrial, automotive, and consumer markets.

The LPS22HHTR belongs to ST's high-accuracy MEMS pressure sensor product line, engineered specifically for applications demanding sub-meter altitude resolution, ultra-low power operation, and robust environmental resilience in space-constrained portable electronics.

FAQ

What is the maximum recommended SPI clock frequency for reliable operation?

The LPS22HHTR supports up to 10 MHz SPI clock frequency per characterization data, but ST recommends ≤8 MHz when operating at output data rates ≤50 Hz to ensure timing margin compliance. At higher ODRs (100–200 Hz), 8 MHz remains safe; exceeding 10 MHz risks setup/hold violations on SDI/SDO lines under worst-case voltage/temperature conditions.

How does the holed HLGA-10L package affect PCB layout requirements?

The holed cavity requires no venting hole in the PCB - ambient pressure reaches the sensing membrane directly through the package opening. Layout must avoid solder mask coverage over the central cavity area and maintain ≥0.3 mm clearance from copper traces to prevent acoustic damping or thermal interference with the diaphragm.

Can the LPS22HHTR operate without external temperature compensation?

Yes - the LPS22HHTR includes factory-calibrated, hardware-based temperature compensation for both pressure offset (TCO ±0.65 Pa/°C) and sensitivity drift. No external compensation or MCU-side algorithms are required to achieve ±0.5 hPa absolute accuracy across -40 to +85 °C.

What interrupt sources can be routed to the INT_DRDY pin?

INT_DRDY supports three configurable interrupt types: Data-Ready (new pressure/temperature sample ready), FIFO-related flags (full, watermark, empty), and pressure threshold events (high/low crossing with latch option). Each is independently enabled via INTERRUPT_CFG register bits and shares the same open-drain output structure.