Product Overview

ILPS28QSWTR is a dual-range, high-precision, ultra-low-power absolute digital output barometric pressure sensor. Housed in a 2.8x2.8x1.95mm CCLGA-7L waterproof package, it supports two selectable full-scale ranges: 260~1260 hPa (Mode 1) and 260~4060 hPa (Mode 2). Integrating Qvar detection (electric charge variation sensing) and an analog hub, it features built-in temperature compensation, a 128-slot FIFO buffer, and supports I²C/MIPI I3CSM interfaces. With a power consumption as low as 1.7 μA and an absolute pressure accuracy of 0.5 hPa, it operates over a temperature range of -40℃~105℃ and is ECOPACK lead-free compliant, making it a versatile and reliable choice among industrial-grade MEMS pressure sensors.

Key Features

• Dual-Range Flexibility：Switch between two full-scale ranges (260~1260 hPa and 260~4060 hPa) to meet the measurement needs of both conventional pressure monitoring and high-pressure scenarios (e.g., industrial equipment, high-pressure vessels).
• Ultra-Low Power & High Precision：Consumes only 1.7 μA in 1 Hz one-shot mode, with a pressure noise of just 0.32 Pa RMS (Mode 1). 24-bit output data and 0.5 hPa absolute pressure accuracy balance energy efficiency and measurement performance.
• Qvar + Analog Hub：Built-in Qvar detection channel enables water-leak detection, tap/double-tap gesture recognition, etc. The analog hub supports analog signal input and digitization, expanding functional diversity.
• Waterproof & Durable Design：Ceramic substrate + metal lid package with potting gel protection, withstands 10 ATM water pressure, resists harsh environments (chlorine, bromine, detergents), and operates over a wide temperature range (-40℃~105℃) for complex working conditions.
• Flexible Interfaces & FIFO：Supports I²C (up to 1 MHz) and MIPI I3CSM (SDR mode) interfaces. The 128-slot FIFO buffer offers 6 operating modes, reducing host polling and lowering system power consumption.

Technical Specifications

Parameter	Specification
Pressure Measurement Range	Mode 1: 260~1260 hPa; Mode 2: 260~4060 hPa
Absolute Pressure Accuracy (Typical)	0.5 hPa (25℃, Mode 1)
Relative Pressure Accuracy (Mode 1)	±0.015 hPa (25℃, 800~1100 hPa)
Pressure Output Data Bit Width	24-bit
Pressure Noise (RMS)	Mode 1: 0.32 Pa; Mode 2: 0.57 Pa (25℃, AVG=512)
Temperature Measurement Range	-40℃ ~ 105℃
Temperature Accuracy (Typical)	±1.5℃ (25~65℃)
Operating Power Consumption (Typical)	1.7 μA (1 Hz one-shot, AH/Qvar disabled, AVG=4)
Power-Down Current (Typical)	1 μA (AH/Qvar enabled); 3.6 μA (AH/Qvar disabled)
Supported Interfaces	I²C (up to 1 MHz), MIPI I3CSM (SDR mode)
Output Data Rate (ODR)	1 Hz ~ 200 Hz
FIFO Buffer	128 slots (24-bit data/slot), 6 operating modes
Package Dimensions	2.8x2.8x1.95 mm CCLGA-7L (7 pins)
Waterproof Rating	Withstands 10 ATM water pressure (equivalent to 100m water depth)
Compliance	ECOPACK Lead-Free Compliant

Typical Applications

• Industrial Automation Applications：As an industrial-grade waterproof pressure sensor, ILPS28QSWTR features 10 ATM waterproofing and a wide temperature range of -40℃~105℃. It can withstand chemical corrosion and extreme temperatures in industrial environments, adapting to gas meters, water meters, and other metering equipment for accurate pressure data collection and leak monitoring.
• Weather Station Equipment：With an absolute accuracy of 0.5 hPa and dual-range design, it meets both conventional meteorological monitoring (260~1260 hPa) and high-altitude/high-pressure environment monitoring (260~4060 hPa). The 24-bit high-resolution output provides reliable data support for meteorological data analysis.
• Altimeter/Barometer for Outdoor Devices：Ultra-low power consumption (1.7 μA) adapts to battery-powered outdoor devices (e.g., climbing watches, outdoor navigators). The 0.32 Pa low-noise performance can accurately capture altitude changes, and dual-range switching meets the measurement needs of different altitude scenarios.
• Medical & Security Equipment：In ventilators and CPAP devices, high-precision pressure monitoring ensures stable air pressure. In man-down detection applications, fast-response pressure change sensing combined with Qvar function improves detection sensitivity and reliability.
• Smart Filters & Ventilation Systems：Monitors filter clogging status through pressure changes; the Qvar function can assist in detecting abnormal media in airflow. The waterproof package adapts to humid ventilation environments, ensuring long-term stable operation of equipment.

Why Choose ILPS28QSWTR ?

• Full Dual-Range Coverage：260~4060 hPa wide range eliminates the need to replace sensors for conventional and high-pressure scenarios, reducing selection and inventory costs.
• Extreme Low Power Consumption：1.7 μA ultra-low operating power consumption, combined with FIFO buffer to reduce host interaction, significantly extending the battery life of battery-powered devices.
• Multi-Functional Integration：Qvar detection + analog hub in one, supporting gesture recognition, water-leak detection and other extended functions, reducing external components and simplifying system design.
• Harsh Environment Adaptability：10 ATM waterproofing, chemical corrosion resistance, -40℃~105℃ wide temperature range, meeting the reliability requirements of industrial, outdoor, medical and other complex working conditions.
• High Compatibility Design：Supports mainstream I²C/MIPI I3CSM interfaces, ECOPACK lead-free compliant, and compact CCLGA-7L package, adapting to various PCB layouts and system integrations.

SUNTOP COMPANY INTRODUCTION

Founded in 2000, Suntop is one of the leading global distributors of electronic components, dedica ted to providing comprehensive procurement and supply chain services to the global electronics manufacturing industry. Our services include distribution, spot trading, PPV cost-saving projects, and inventory management. We not only offer high-quality products but also strive to assist our clients in achieving optimal solutions with minimal time and cost.
As a trusted partner for numerous OEMs, ODMs, CEMs, and EMS companies worldwide, our professional team manages millions of component records from thousands of trading partners across dozens of countries daily through our company database. We maintain close business relationships with major factories and distributors in North America, Europe, and Asia to ensure that our clients stay ahead in a highly competitive market.