The nrf51822 is a powerful, highly flexible multi-protocol SoC that is ideal for Bluetooth® low power and 2.4GHz ultra low power wireless applications. The nRF51822 is built on a 32-bit ARM® Cortex ™ M0 CPU with 256kB flash + 16kB RAM. The embedded 2.4GHz transceiver supports Bluetooth low power and 2.4GHz operation, of which the 2.4GHz mode is wirelessly compatible with Nordic Semiconductor's nRF24L series.

The nRF51822 also features a wealth of analog and digital peripheral products that can be interacted through a programmable peripheral interface (PPI) system without CPU involvement. The flexible 31-pin GPIO image scheme allows I / O (such as serial interfaces, PWM and sine demodulators) to be mapped to any device pins according to PCB requirements indications. This provides complete design flexibility in terms of pin position and function. You may find more informations about electronic components here.

The nRF51822 supports the S110 Bluetooth low-power protocol stack and the 2.4GHz protocol stack (including Gazell), both of which are provided free of charge in the nRF518 software development kit. NRF51822 need a separate power supply, if the power supply range between 1.8-3.6V, the user can choose to use the chip linear rectifier, if the power supply range between 2.1-3.6V, you can choose DC 1.8V mode and chip DCDC transformer. The use of DC-DC transformers can be dynamically controlled during operation and the RF peak current during operation of the nRF51822 is less than 10 mA @ 3V (TX @ 0 dBm & RX). Here is the datesheet of nRF51822

The nRF51822 has a 6x6mm 48-pin QFN package and a 3.5x3.8mm 64-ball direct chip-in-wafer package (WLCSP).

NRF51822 Key Features:

Single chip, high flexibility, 2.4GHz multi-protocol device

32-bit ARM Cortex M0 CPU core

256KB flash 16KB RAM

Support S110 Bluetooth low power protocol stack

S110 requires 80 kB of memory space

Thread safety and runtime protection

Event-driven API

Wireless compatibility with nRF24L series

3 data rates (2Mbps / 1Mbps / 250kbps)

+ 4dBm output power

-92.5dBm sensitivity, Bluetooth low power consumption

PPI systems for maximizing power efficiency applications and procedural code simplification requirements

A flexible power management system with automatic power management for each peripheral product

A set of I / O mappings for analog and digital I / O You may interested on: 50WQ10FN