TSOP14638

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The TSOP – 14638 is an infrared receiver, and as such, can be classified as an optical sensor, photo detector, and remote receiver. It is the smallest in a family of infrared receivers that are very common and popular in a number of applications. It is typically used in consumer electronics to detect remote signals from an infrared transmitter. The TSOP14638 contains a Photo-transistor in a black epoxy package and is a good choice for those applications requiring a low cost, low powered alternative.

Overview of the TSOP14638

The TSOP14638 is an infrared remote control receiver with a field of view of about ±45° due to its in-built Fresnel lens. It consists of an active low-noise amplifier, a frequency-selective filter, demodulation circuitry, and an antenna. Internally, it operates on 5V DC and can be soldered to a standard circuit board. The advantage of this receiver is that it is relatively low powered and small, making it good for portable and low power applications. Additionally, it is highly sensitive, with a response time of a few milliseconds, and a minimum response range of just 4kHz.

Application Fields for the TSOP14638

The TSOP14638 is often used in consumer electronic devices such as television remote controls, computer game controllers, and other types of remote-control devices. Because it operates on 5V DC, it can be simply plugged into the circuit board of the device, and it is also conducive to a number of wireless communication and automation applications.

In particular, the TSOP14638 is often used in remote-controlled projects such as robots, intelligent toys, and similar projects that require reliable detection of signals. In addition, it is commonly used for wireless home automation projects, allowing users to remotely control devices like lights, fans, and other electrical appliances.

Working Principle

As mentioned earlier, the TSOP14638 comprises a low-noise amplifier, a frequency-selective filter, and demodulation circuitry, as well as an antenna. When an infrared signal is received via its antenna, the signal is selectively filtered through the frequency-selective filter, and demodulated by the demodulation circuitry. The low-noise amplifier then amplifies the signal, resulting in a clean, low-noise signal, which is finally passed on to the device.

In order for the TSOP14638 to detect digital information, the data is encoded into the infrared signal using an appropriate protocol like the Pulse-Position Modulation (PPM). A PPM data stream typically consists of 5 to 8 short pulses, with each ‘bit’ represented by a 500 microsecond pulse.

The image below illustrates the working principle of the TSOP14638:

Conclusion

The TSOP14638 is a small, low-cost, low-power infrared receiver with a sensitivity of only 4kHz – making it suitable for many consumer and automation applications. It can send and receive encoded infrared signals, and can be easily connected to a standard circuit board. It is an essential component for a variety of projects in consumer electronics, wireless communication, and home automation.

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