TSOP14138

TSOP14138 Application Field and Working Principle

Optical Sensors – Photo Detectors – Remote Receiver

The TSOP14138 optical sensor is a type of light receiver device used to detect beams of infrared light and convert them into electrical signals. It is a miniature Infra-Red (IR) receiver module used for remote control systems in various consumer electronics applications. Both reflective and non-reflective sensors are available. TSOP14138 photo receiver modules are commonly used as wireless remote control receivers for televisions, DVD players, air conditioners, lights, gates, and other consumer products.

Features of TSOP14138

• Wide supply voltage range of 2.2V to 6.0V.
• Low power consumption.
• High sensitivity.
• Low Standing current.
• Fast response time of 15ms to 20ms.

Structure and Specifications

The TSOP14138 module consists of a PIN photodiode, a pre-amplifier, a band-pass filter, an amplifier, and an output driver. It has a frequency response range from 35K Hz to 60K Hz. The module is triggered by a specific carrier frequency produced by a remote control. The pin compatible package of the sensor can fit in practically all applications and is extremely easy to use. The peak sensitivity is 950nm with the response limited from 900nm minimum up to 1050 maximum visible and near infrared light. The output is active low which provides a TTL level 0V when the module senses a wave. The active low type of the module makes it to compatible to be used with most applications.

Working Principle

The working principle of TSOP14138 can be easily understood by considering the structure. The PIN photodiode is a form of photo detector that is used to detect IR light signals emitted by the remote control device. The IR light stimulated by the remote control device enters the reverse biased photodiode. The IR signal is then amplified by the pre-amplifier and subsequently filtered by a band-pass filter present inside the sensor. The filtered signal is then amplified further by the amplifier. The amplified signal is given to the output driver which drives the output to a TTL level (0 or 1). When no signal is sensed, the output of the module is high (+5V) and when the module senses a wave, the output goes low (0V). The photo detector has low standby current which reduces the overall power consumption of the module.

Application

One of the most common applications of TSOP14138 is in Remote Controlled (RC) toys. It is used as a wireless receiver in RC devices such as cars, planes and helicopters. Other devices such as TVs, DVDs, air conditioners, and garage door openers also make use of this module. This IR module can also be used in robotic applications for IR sensors. Multi channel applications such as barrier control or alarm systems also make use of this module. It can be used to control multiple devices from a single remote.

Conclusion

The TSOP14138 is a miniature and low power consumption infrared receiver module used for various remote control applications. It consists of a PIN photodiode, a pre-amplifier, a band-pass filter, an amplifier, and an output driver. It is widely used in remote control applications for RC devices, TVs, DVDs, air conditioners, etc.