Ultra-compact piezoresistive absolute pressure sensor

The ILPS28QSW from STMicroelectronics is an ultra-compact piezoresistive absolute pressure sensor that can be used as a digital output barometer. It supports dual-mode full scale up to 4,060 hPa, which can be selected by users. The device consists of a sensing element and an IC interface that enables communication between the sensing element and the application through an I²C or MIPI I³C® interface. The ILPS28QSW has lower power consumption and pressure noise than previous versions.

The ILPS28QSW has embedded analog hub sensing capabilities to connect analog inputs and convert them into digital signals for embedded processing. In addition, you can enable an embedded Qvar (charge Change detection) channel for sensing in water leak detection, tap, double click, long press, and left-to-right/right-to-left swipe applications.

The ILPS28QSW comes in a ceramic LGA package with a metal lid. The device is guaranteed to operate in the extended temperature range from -40°C to +105°C. The package has openings to allow external pressure to reach the sensing element. Gels within the IC protect electrical components from water, and metal caps are optionally grounded or keep electrical floating in the application PCB layout. The connection mode of the metal cap depends on the target application of the customer.

Features

● Dual mode full range pressure sensor, waterproof package
-   Mode 1:260 hPa to 1260 hPa
-   Mode 2:260 hPa to 4060 hPa
● An embedded analog hub for processing analog input data
● Embedded Qvar for detecting charge changes
● Current consumption as low as 1.7 μA
● Absolute pressure accuracy: 0.5hPa
● Low pressure sensor noise: 0.32Pa
● Built-in temperature compensation
● Extended temperature range: -40°C to +105°C
● 24 bit pressure data output
● 1 Hz to 200 Hz ODR
● I²C or MIPI I³C interface
● Embedded FIFO
● Power supply voltage: 1.7V to 3.6V
● Easy seal package with O-ring
● Meets the ECOPACK lead-free specification