NRF51822-QFAA-R

Power - Output:	4dBm
Package / Case:	48-VFQFN Exposed Pad
Operating Temperature:	-25°C ~ 75°C
Current - Transmitting:	4.7mA ~ 16mA
Current - Receiving:	9.7mA ~ 13.4mA
Voltage - Supply:	1.8 V ~ 3.6 V
GPIO:	32
Serial Interfaces:	I²C, SPI, UART
Memory Size:	256kB Flash, 16kB RAM
Sensitivity:	-96dBm
Series:	--
Data Rate (Max):	2Mbps
Frequency:	2.4GHz
Modulation:	GFSK
Protocol:	Bluetooth v4.0
RF Family/Standard:	Bluetooth, General ISM > 1GHz
Type:	TxRx + MCU
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

RF transceiver ICs are specialized integrated circuits with both transmitter and receiver properties. They transmit wireless signals electromagnetically, using highly frequency fluctuations. NRF51822-QFAA-R is a specialized IC with built-in wireless protocol stack and Bluetooth low energy radio. These devices are widely used in Telecommunication, Robotics, Medical and Automotive control systems. This article will discuss the application field and working principle of NRF51822-QFAA-R.

Application Field

NRF51822-QFAA-R is used for low power wireless communications. It can be employed in short-range devices such as audio, voice and data transmission. It is particularly useful in Bluetooth 4.2 applications as Bluetooth low energy radio. Additionally, it can be used as a controller for devices such as sensors, lighting, and other related equipment. Its applications extend to the home, medical, industrial, and consumer markets since it can enable smart living and connected home solutions. It can also be used for consumer medical, health and fitness products that require low power wireless communication capabilities.

Working Principle

NRF51822-QFAA-R is an integrated radio transceiver and protocol stack that operates at a frequency of 2.4 GHz. It is a low power and low complexity radio for data transfer. It supports up to 40 dBm of output power, enabling longer range and a greater degree of signal reception. The device uses a 32-bit ARM-Cortex M0 processor to decode data and control the frequency of the output signal. The processor also executes the embedded Bluetooth low energy and proprietary protocol stacks.The radio features a separate baseband controller and a digital radio frequency system. The baseband controller is responsible for controlling and decoding the Link Layer protocols using modulation schemes such as GFSK, DSSS or 2-GFSK while the RF system is responsible for all the frequency related parameters. The radio is connected to the antenna through a balun or RF matching network to provide appropriate impedance matching for the antenna.

Conclusion

NRF51822-QFAA-R is a specialized RF transceiver IC with built-in wireless protocol stack and Bluetooth low energy radio. This IC is used for low power wireless communication and is particularly useful for Bluetooth 4.2 applications. It features an embedded 32-bit ARM-Cortex M0 processor, separate baseband controller and a digital radio frequency system. It is widely used in Telecommunication, Robotics, Medical and Automotive control systems.

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