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nRF51822 based Bluetooth 4.0 Low Energy RF Module w/antenna


RF Digital

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RoHS Status:   Available RoHS Compliant

RFD51822 is now RFD22301 - Go to RFD22301 product page -click here.

The  RFD51822 module by RF Digital is a READY-TO-USE Bluetooth 4.0 Low Energy wireless solution based on the Nordic nRF51822 Multi-protocol Bluetooth Low Energy and 2.4GHz proprietary system-on-chip. Footprint and pin compatible with the RFD21733 line of RF Modules. Built-in DC/DC converter circuit for additional power savings.

The RF Digital RFD51822 module is well know as the "brains" of the Open Source RF RFduino - a finger-tip sized, Arduino compatible, wireless enabled microcontroller.

About the nRF51822:

The Nordic Semiconductor nRF51822 is a multi-protocol Bluetooth low energy / 2.4GHz proprietary RF Flash-based SoC that is designed specifically to be used as a single-chip solution for a range of Bluetooth low energy and 2.4GHz proprietary designs in cost, power, and size constrained applications including PC peripherals, connected TV remote controls, sports/fitness/healthcare sensors, toys, and automation.

The nRF51822 is a powerful, highly flexible multi-protocol SoC ideally suited for Bluetooth® low energy and 2.4GHz ultra low-power wireless applications. The nRF51822 is built around a 32-bit ARM® Cortex™ M0 CPU with 256kB flash + 16kB RAM. The embedded 2.4GHz transceiver supports Bluetooth low energy as well as 2.4GHz operation, where the 2.4GHz mode is on air compatible with the nRF24L series products from Nordic Semiconductor.

nRF51822 also incorporates a rich selection of analog and digital peripherals that can interact without CPU intervention through the Programmable Peripheral Interface (PPI) system. A flexible 31-pin GPIO mapping scheme allows I/O like serial interfaces, PWM and quadrature demodulator to be mapped to any device pin as dictated by PCB requirements. This enables complete design flexibility associated with pin-out location and function.

nRF51822 supports the S110 Bluetooth low energy protocol stack as well as 2.4GHz protocol stacks, including Gazell, both available free of charge in the nRF518 Software Development Kit. nRF51822 requires a single power supply and gives the user the option of using on chip linear regulators giving a supply range of 1.8-3.6V, a direct 1.8V mode and a on chip DCDC buck converter giving a supply range of 2.1-3.6V. The use of the DC-DC converter can be dynamically controlled during run time and enables nRF51822 to operate at radio peak currents below 10 mA @ 3V supply (TX @ 0 dBm & RX).

The Nordic nRF51822 based RF Digital RFD51822 Bluetooth 4.0 Low Energy RF module is commonly used in applications such as:

  • Seismic Monitoring
  • Biometrics 
  • Camera Flash Control 
  • Pan-Tilt-Zoom Control 
  • Vending Machines 
  • Industrial Controls
  • Keyfob Remotes
  • Inventory Control 
  • Data Acquisition 
  • Meter Reading 
  • HV/AC 
  • Temperature Control 
  • Wireless RS485 
  • Wireless RS232 DB9 
  • Remote Terminals
  • Remote Switches 
  • Wireless PTT 
  • Asset Tracking
  • Home Stereo Remote 
  • TV Remote 
  • Wireless Mouse 
  • Wireless Keyboard 
  • PC Keyboard Security
  • Perimeter Monitoring 
  • Keyless Entry 
  • Alarm Security 
  • Home Automation 
  • Light Controls 
  • Remote Control 
  • Long Range RFID 
  • Active RFID
  • M2M and many more... 
  • 2.4GHz multi-protocol device
  • 32-bit ARM Cortex M0 CPU core
  • 256KB flash 16KB RAM
  • Supports S110 Bluetooth low energy protocol stack
  • S110 requires 128 kB memory space
  • Thread safe and run-time protected
  • Event driven API
  • 3 data rates (2Mbps/1Mbps/250kbps)
  • +4dBm output power
  • -92.5dBm sensitivity, Bluetooth low energy
  • PPI system for maximum power-efficient applications and code simplification
  • Flexible power management system with automatic power management of each peripheral
  • Configurable I/O mapping for analog and digital I/O
RF Digital RFD51822 Datasheet
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