TSOP33138

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Optical sensors are essential for any modern application that needs to operate reliably in any environment, including artificial light, natural light, deep shadows, and even in underdeveloped lighting conditions. Such properties make them an ideal technology for applications such as occupancy sensing, object detection, danger detection, and visual and non-visual data acquisition. As part of this technology, photo detectors play an important role in enabling reliable sensing and communication in these applications. One such example is the TSOP33138 remote receiver, a photo detector that pairs with an infrared (IR) emitter to allow non-visual and remote communication. This article will discuss the main application fields of the TSOP33138 and how it works to facilitate remote communication.

The TSOP33138 is a miniature surface-mount device (SMD) that utilizes a PIN diode as a photodetector to detect modulated IR trails from the IR emitter. This device is capable of peak detection detections in the frequency range from 32 kHz to 38 kHz. This range makes the device suitable for many different applications, such as remote keyless entry systems, computer-to-computer communication, RF wireless communication, and even industrial and home appliance communications. The device has an integrated voltage regulator that can output a regulated voltage to 3.3 V, allowing the device to always maintain its specified characteristics, whether it is 3.6V or lower. Furthermore, the device is also tested to be immune from external environmental effects such as electromagnetic interference, electro-magnetic fields, and static electricity.

The working principle behind the TSOP33138 is fairly simple. The device is designed to detect modulated IR trails that have been emitted from an IR emitter. These trails have a specific frequency range, and the device is able to detect the frequency and differentiate it from other frequencies. The device can then output a small voltage to its external circuit, and this voltage can be used to trigger a function or signal an alarm, depending on its application.

In terms of usage, the device’s output voltage is generally connected to a microcontroller, which then processes the voltage and performs the predefined function. Additionally, the device can be configured to detect signals in the 20 kHz range by adjusting its internal timer; this allows the device to be used in a wide range of applications, ranging from Wi-Fi to IR communication. The device also features an on/off circuit to eliminate a false triggering of the output due to ambient infrared radiation.

The TSOP33138 is also equipped with a dedicated output enable pin, allowing the device to be used in 3-pin remote controls or paired with an external switch. When the device is in its enabled state, the output voltage can be used to signal the presence of an IR trail, and when the output is disabled, the output stays inactive until it is re-enabled. Such features make the device suitable for applications such as motion sensors, traffic light controls, street light controls, and other various sensor-based systems.

Overall, the TSOP33138 has a wide range of potential application fields due to its PIN diode-based photodetection and wide frequency range detection. It is also suitable for long-distance communication due to its output control pin and external switch function. The device’s low activation voltage, robustness, and immunity to external environmental factors further add to its versatility. All of these features along with its simple working principle make the TSOP33138 an ideal photo detector for remote communication and non-visual communication applications.

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