TSOP58438

Series:	--
Packaging:	Bulk
Part Status:	Active
Sensing Distance:	40m
B.P.F. Center Frequency:	38.0kHz
Voltage - Supply:	2.5V ~ 5.5V
Current - Supply:	700µA
Orientation:	Side View
Mounting Type:	Through Hole
Operating Temperature:	-25°C ~ 85°C (TA)

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Introduction

Optical sensors have become an indispensable component of many existing electronic systems due to their inherent advantages of speed and accuracy. They are widely used for applications such as remote sensing, navigation, and health monitoring. The photo detectors form a large application categories, and the TSOP58438 is a representative optical sensor device in this field. In this article, the application field and working principle of TSOP58438 will be discussed in detail.

Application Field

The TSOP58438 (also known as the TSOP38725, M58725, SFH107, TSOP38728, and TSOP581) is a remote receiver of infrared (IR) signals, using a two-channel active photo diode, integrated with a monolithic signal processor, amplifier, and an oscilloscope. It is mainly applied in the outdoor lighting, switches, cars, home appliances, and toys fields as a motion sensing and signal detection device. In outdoor lighting, the TSOP58438 is typically fixed to the ceiling or wall, with the processor and amplifier used to detect sudden fluctuations in the intensity of natural light, such as thunderstorm or excessive ultraviolet radiation, and the oscilloscope to continuously measure the ambient light level. This allows the TSOP58438 to accurately detect any change in the brightness and provide adjustment signal to the lighting system.In car applications, the TSOP58438 is used as a motion sensor to detect vibrations in the vehicle to control the vehicle speed. This eliminates the need for a separate onboard computer, as the TSOP58438’s processor and amplifier can detect these vibrations and transmit a signal to the engine control unit to limit the vehicle speed.In home appliances and toys, the TSOP58438 is used as an active photo diode to detect the presence of an IR signal and change the connection status accordingly. This allows the devices to react to any remote signals from the user and change the appliance’s setting.

Working Principle

The TSOP58438 works by detecting the reflected infrared (IR) light outputted by various remote controllers. It uses two channels, one for receiver and another for amplifier, to detect the IR light signals. The receiver will detect the incoming light, and the amplifier will amplify the light signal and convert it into a digital output signal. When a remote controller output an IR light signal, the TSOP58438 receiver captures the signal, amplifies it using its amplifier, and sends it to a signal processor that will convert the signal into a digital output signal. The digital signal is then transmitted to a microprocessor, which will interpret the signal and control the circuit accordingly.

Conclusion

In conclusion, the TSOP58438 is a widely used remote receiver photosensors, used in a wide variety of applications. It uses two channels of receiver and amplifier to detect the reflected IR signal from the remote controller and convert it into a digital output signal. This makes it an ideal choice for outdoor lighting, switches, cars, home appliances, and toys.

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