디지털 I2C 압력 센서 -ILPS28QSW
(PRESS CLICK)
개요
- 본 제품은 디지털 I2C 압력 센서 -ILPS28QSW입니다.
- ILPS28QSW 센서를 장착하고 있으며, 260hPa에서 4060hPa 범위의 압력을 측정이 가능합니다.
- Qvar(electric charge variation detection) 검출 기능을 지원합니다.
특징
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HOW DOES IT WORK?
PRESS Click is based on the ILPS28QSW, an absolute digital output barometer from STMicroelectronics. The sensor comes in a water-resistant package, and a metal lid can be easily sealed with an O-ring. It has two user-selectable modes that allow you to set a measuring range. As a main feature, the sensor integrates an analog hub sensing functionality to connect an analog input and convert it to a digital signal for embedded processing. It also integrates Qvar channels that can be enabled for sensing in applications such as water leak detection, tap, double tap, long press, and even a left-to-right and right-to-left swipe. The sensor has good accuracy, low-pressure sensor noise, low power consumption, and a 24-bit pressure data output.
The inner sensing element consists of a silicon membrane for MEMS pressure sensors. When pressure is applied, the membrane deflection induces an imbalance in the Wheatstone bridge piezoresistance, whose output signal is converted by the sensor's interface. The sensing element is designed to resist water pressure of up to 10ATM, while the potting gel protects electronic components from long-term exposure to harsh environments. The sensor is factory-calibrated, and the trimming values are stored in a non-volatile memory.
The sensor can work in several modes, such as Bypass, FIFO, Continuous mode, Continuous-to-FIFO, Bypass-to-Continuous, and Bypass-to-FIFO mode. There are 128 slots of 24-bit FIFO data to store the pressure output values, allowing consistent power savings as the host MCU does not need to poll data from the sensor continuously.
The PRESS Click allows you to use the Qvar functionalities of the sensor. There are two sets of pads. The upper pair can be used as a radar and is disabled by default. You can enable it by soldering two unpopulated R8 and R15 0ohm resistors. Two arrow-like pads are parts of a sensitive touch interface able to detect touch, press, or swipe. Two 3-pin headers allow you to attach external electrodes on the sensor's Q1 and Q2 Qvar channels. Those electrodes can be used for all the mentioned Qvar functionalities. PRESS Click uses a standard 2-Wire I2C interface to communicate with the host MCU. The I2C interface of the sensor supports Fast mode and I2C clock frequencies of up to 1MHz.
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
SPECIFICATIONS
Type Pressure Applications Can be used for the development of industrial applications, gas and water metering, weather station equipment, altimeters and barometers for outdoor devices, and more On-board modules ILPS28QSW - absolute digital output barometer from STMicroelectronics Key Features A dual full-scale absolute pressure sensor in a water-resistant package, an integrated analog hub for processing analog data input, integrated Qvar for detecting electric charge variation, low current consumption, good accuracy, integrated temperature compensation, Qvar pads, Qvar connectors, and more Interface I2C ClickID Yes Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V