RPM871-E4A Sensors, Transducers

Data Rate:	115.2kbs (SIR)
Voltage - Supply:	2.6V ~ 3.6V
Idle Current, Typ @ 25°C:	73µA
Link Range, Low Power:	20cm, 60cm
Orientation:	Top View
Operating Temperature:	-20°C ~ 85°C
Size:	7.60mm x 2.72mm x 2.00mm
Standards:	IrDA 1.2
Shutdown:	--
Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete

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Introduction

RPM871-E4A is a member of the family of IrDA transceiver modules. It is a dedicated, short-range infrared communication transceiver that operates in two modes: basic and enhanced. The module adopts UART communication protocols to provide full-duplex communication with minimal external hardware components for both point-to-point and point-to-multipoint implementations. This paper will discuss the application field of RPM871-E4A and its working principle.

Application Field

The RPM871-E4A IrDA transceiver module can be applied in various fields, such as consumer electronics, home automation, medical instruments, industrial equipment, and security systems. In consumer electronics, the module is used to provide a wireless connection between laptops, tablets, cell phones, cameras, and other devices. For home automation, it can be employed to monitor and control the lighting, temperature settings, and other appliances remotely. In medical instruments, the module is capable of establishing wireless communication capabilities for patient monitoring and other medical treatments. It can be used in industrial equipment for machine-to-machine communication to transfer data and commands. It can also be used in security systems to set up an alarm or to monitor the environment through motion detection sensors.

Working Principle

The working principle of RPM871-E4A IrDA transceiver module is based on the transmission of infrared signals between one or multiple devices. The module transmits and receives data at a rate of 115 kbits/sec in the basic mode and up to 4 Mbits/sec in the enhanced mode. The transmitted data is encoded using Pulse Position Modulation (PPM) and Pulse Width Modulation (PWM) in both modes. The received signals are decoded using differential encoding.To ensure reliable communication, the module features a built-in temperature compensated oscillator (TCO) to set the frequency for data transmission and receive. The TCO provides excellent temperature stability and immunity to external interference. The module also includes an Automatic Gain Control (AGC) circuit to adjust the power level of the transmission. The speed of communication is adjusted by the module to match the data speed of the connected device. The overrun error protection is supported on the module, to enable data integrity. In addition, the module also features automatic receipt of error-checking and error-correction.

Conclusion

RPM871-E4A IrDA transceiver module is a reliable, short-range infrared communication transceiver module, deployed for point-to-point and point-to-multipoint implementations. It uses UART communication protocols and supports data rates up to 4Mbits/sec. The module is widely used in various fields such as consumer electronics, home automation, medical instruments, industrial equipment and security systems. It features a built-in temperature compensated oscillator, Automatic Gain Control circuit, overrun error protection and automatic receipt of error-checking and error-correction, to ensure reliable communication.

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