Murata Manufacturing Co., Ltd has launched a digital output SMD pyroelectric infrared sensor, IRS-D200ST00R1, with low power consumption and is already in mass production.
In recent years, the use of IoT technology in smart homes and smart buildings has increased convenience, safety, and power saving within living spaces and facilities. Because of this, the demand for wireless communication units equipped with human detection functions capable of sensing movement in real time is also increasing to realize more efficient and comfortable environments. One of the key technologies to enable the motion detection function is a pyroelectric infrared sensor. Products which communicate wirelessly require long-term stable operation with reduced battery replacement or charging, thus creating a strong need for pyroelectric infrared sensors that can detect human movement while extending battery life. Additionally, to increase design flexibility inside these products, space-saving measures are essential, driving demand for compact infrared sensors., space-saving measures are essential, driving demand for compact infrared sensors.
In response, we developed this product using proprietary pyroelectric ceramic technology to achieve low power consumption and a compact size. Even when continuously operating the human detection function, power consumption is kept low, and the sensor includes an interrupt function that activates the microcontroller only when a change is detected, contributing to extended battery life. Furthermore, the compact size enables space-saving, and the adoption of the digital I2C interface simplifies design during development.
The main features of this product include contributing to overall system power reduction through low power consumption and interrupt functionality, space-saving due to its small and low-profile SMD package, ease of design enabled by built-in amplifier and ADC with digital output (I2C), reduction of false detections and stable operation thanks to high signal-to-noise ratio and EMI noise resistance, Also enabling process cost reduction through reflow compatibility.
Key specifications are a dual element electrode size of 0.08 × 0.02 inch (2.0 × 0.5 mm), an overall size of 0.24 × 0.24 × 0.10 inch (6.0 × 6.0 × 2.6 mm), typical sensitivity of 19.5 mV, element height of 0.065 inch (1.65 mm), field of view of ±55° horizontal and ±42° vertical, supply voltage from 1.8 to 3.3 V, typical current consumption of 8 µA, and an I2C interface.
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