TSOP4838

Series:	--
Packaging:	Bulk
Part Status:	Active
Sensing Distance:	45m
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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TSOP4838 Application Field and Working Principle

Introduction

The TSOP4838 is an Infrared Receiver for Remote Control Systems, incorporating a photo detector and preamplifier on one single chip. Developed by Vishay Semiconductors, the device is designed to receive 38 kHz modulated light, demodulate this signal and output a clean digital square wave signal. This digital output is ideal for use with PIC/AVR receivers, providing users with the ability to operate a wide range of consumer infrared remote control systems.

Application Field

The TSOP4838 is capable of receiving and demodulating a 38kHz signal. It has the capacity to operate with a wide range of remotes, such as universal remote controls, set top box controllers, constant touch sensitive controls, home theatre systems and many more. The device has been specially designed for consumer infrared applications and is capable of operating in both low and high power modes. In applications where power consumption is critical, the low power mode is recommended, as it can significantly reduce power usage and also provide better sensitivity.

Features

The TSOP4838 offers several advantageous features. Its photodetector, preamplifier and demodulator are all integrated on a single chip, allowing for a much smaller board footprint. This device also features a low supply current (4mA) and low inhibit current (4 μA). Furthermore, it provides Active High output, enabling quick and easy installation. Additionally, its low power consumption makes it an excellent choice for battery powered application.

Pin Configuration

The TSOP4838 has 5 pins: GND, Vcc, OE, OUT and NC.

• GND – Ground.
• Vcc – Supply Voltage
• OE – Output enable.
• OUT – Output pin, active-high output.
• NC – Not connected.

Working Principle

The TSOP4838 receives and demodulates modulated 38kHz light from the remote and outputs a clean digital square wave signal. When the device receives the signal, the integrated photodetector senses the intensity of the light and converts it into a small electrical current. This current is then amplified and fed to the demodulator, which filters out the 38kHz signal. Finally, the signal is sent to the output pin, where it can be used by a PIC/AVR receiver to operate a wide range of consumer infrared remote control systems.

Conclusion

The TSOP4838 is a highly versatile Infrared Receiver for Remote Control Systems, providing users with the ability to operate a wide range of consumer infrared remote control systems. It has 5 pins: GND, Vcc, OE, OUT and NC, with a low supply current (4mA) and low inhibit current (4 μA). This device can work in both low and high power modes, allowing for a more efficient operation in applications where power consumption is critical. The TSOP4838 is an ideal solution for consumer infrared applications.

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