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  • The nRF51822 is a powerful, highly flexible multiprotocol SoC
  • It is ideally suited for Bluetooth® Smart (previously called 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/128kB flash + 32kB/16kB RAM for improved application performance.
  • The embedded 2.4GHz transceiver supports both Bluetooth Smart and the Nordic Gazell 2.4 GHz protocol stack which is on air compatible with the nRF24L series products from Nordic Semiconductor.
  • Communication distance (open outdoor@1M data rate): 30m
  • Frequency range: 2.4GHz
  • Operating voltage: 2.0V ~ 3.6V
  • ARM® CortexTM-M0 32 bit processor, 128 bit AES HW encryption, 256kB flash & 32kB RAM
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    NRF51822 incorporates a rich selection of analog and digital peripherals that can interact without CPU intervention through the Programmable Peripheral Interconnect (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.

    important featues are listed below: 

    Frequency band

    2.4GHz ISM ( 2.40000 – 2.4835GHz)

    On-air data rate

    250 kbps, 1 Mbps or 2 Mbps

    Modulation

    GFSK

    Output power

    Programmable: +4 to -20dBm in 4dB steps

    Sensitivity

    -92.5dBm Bluetooth low energy -96dBm at 250kb -90dBm at 1Mbs -85dBm at 2Mbs

    Radio current consumption LDO at 1.8V

    16mA – TX at +4dBM output power 10.5mA – TX at 0dBm output power 13mA – RX at 1Mbs

    Radio current consumption DC-DC at 3V

    10.5mA – TX at +4dBm output power

    8.1mA – TX at 0dBm output power

    9.5mA – RX at 1Mbs

    Microcontroller

    32-bit ARM Cortex M0

    Program Memory

    256kB Flash

    RAM

    16kB

    Oscillators

    16MHz crystal oscillator

    16MHz RC oscillator

    32kHz crystal oscillator 32kHz RC oscillator (±250 ppm)

    System current consumption

    420nA – No RAM retention 530nA - 8k RAM retention 2μA – All peripherals in IDLE mode

    Hardware Security

    128-bit AES ECB/CCM/AAR co-processor

    GPIO

    31 configurable

    Digital I/O

    X2 Hardware SPI master 2X 2-wire master UART Quadrature demodulator

    Peripherals

    10-bit ADC RNG Temperature sensor RTC

    PPI

    16-channel

    Voltage regulator

    LDO (1.8 to 3.6V), LDO bypass (1.75 to 1.95V) Buck DC/DC (2.1 to 3.6V)

    Timers/counters

    2 x 16 bit, 1 x 24bit, 2 x 24bit, RTC

    Package options

    RoHS compliant 48-pin 6x6 QFN

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