TSOP75240WTR

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Optical sensors are devices that measure the intensity, amount, or quality of light, or presence or movement of objects using light. Photo detector or remote receiver are popular use of optical sensors. Third order interception point (TSOP75240WTR) is a type of remote receiver, uses to detect and receive 38KHz carrier frequency signals from an infrared (IR) source.

Application Field

TSOP 75240WTR is ideal and efficient choice for IR remote control functions. They are commonly employed in remote keyless entry (RKE) systems, television (TV) and cable remote controls, and in IR communications in the telecommunications and data communications industry. In addition to these applications, it can be applied to motor vehicle operation in models of the security system, main and secondary doors.

Working Principle

TSOP75240WTR is a super-regenerative remote receiver which amplifies and responds to 38KHz modulated infrared signal. The design consists of two main parts: the unit cell, which is responsible for signal amplification; and a discrete component stage, which helps to regulate the output signal level during the reception of the 38KHz remote controller signal. It has an integrated bandpass filter that can be preset to specific frequency, it only allow a narrow bandwidth frequency with small number of harmonics passing through. This design greatly reduces interference from external sources and enhances the clarity of the signal.

TSOP75240WTR is designed to receive continuously modulated 38KHz signal from different types of IR remote controllers. When the modulated signal is received, the conversion of the electrical signal to a logic level output occurs. This logic level is translated by the microcontroller to a design-specific command.

Conclusion

The TSOP75240WTR is an ideal choice for applications that require a reliable and secure method of receiving 38KHz modulated information from an infrared source. This design feature reduces interference from outside sources and helps to ensure a secure wireless communication link. The features and benefits of using this type of remote receiver allow for a wide range of applications, from security systems to television and multimedia devices.

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