QN908x: Ultra-Low-Power Bluetooth Low Energy System on Chip Solution

QN9080

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Note: QN9090/30 is preferred for any new Bluetooth LE design.

QN908x is an ultra-low-power, high-performance and highly integrated Bluetooth Low Energy solution for Bluetooth® Smart applications such as sports and fitness, human interface devices, and app-enabled smart accessories. It is specially designed for wearable electronics with a small capacity battery.

QN908x integrates a Bluetooth Low-Energy radio, controller, protocol stack and profile software on a single chip, providing a flexible and easy to use Bluetooth Low Energy SoC solution. It also includes a high-performance MCU (32-bit Arm® Cortex®-M4F), on-chip memory, and peripherals for users to develop a truly single-chip wireless solution.

Additional system features include fully integrated DC-DC and LDO, low power sleep timer, battery monitor, 16-bit high-resolution general purpose ADC, and GPIOs, to further reduce overall system size and cost. QN908x operates with a power supply range of 1.8 V to 3.6 V and has very low power consumption in all modes. It enables long lifetime in battery-operated systems while maintaining excellent RF performance.

Block Diagram

QN908x Block Diagram

QN908x Block Diagram
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Features

System

  • Integrated 32-bit Arm Cortex M4F MCU running up to 32 MHz
  • Arm Cortex-M4F built-in NVIC
  • Serial wire debug (SWD)
  • System tick timer
  • Fusion Sense co-Processor (FSP)
  • Complete Bluetooth Low Energy protocol stack and application profiles
  • Bluetooth Low Energy v4.2 full feature support
  • LE 2M PHY with Bluetooth 5 compatibility
  • Wi-Fi/Bluetooth coexistence interface
  • Support concurrent central and peripheral modes, with up to 16 simultaneous connections
  • 48-bit unique BD address in flash

Memory

  • 512 kB embedded flash
  • 128 kB RAM
  • User controllable code protection

RF

  • -95 dBm RX sensitivity (LDO mode)
  • -93 dBm RX sensitivity (DC-DC mode)
  • TX output power from -20 dBm to 2 dBm, with 2 dB step
  • -30 dBm Tx output power mode
  • Integrated Tx/Rx switch and balun with single RF port
  • Support external PA to boost Tx power
  • Fast and reliable RSSI and channel quality indication in 1 dB step
  • Compatible with worldwide radio frequency regulations

Power consumption

  • Single 1.8 V ~ 3.6 V power supply
  • Integrated DC-DC buck converter and LDO
  • 1 µA deep sleep mode
  • 2 µA sleep mode (32-kHz OSC/RTC on)
  • 3.5 mA RX current with DC-DC at 3 V supply
  • 3.5 mA TX current @0dBm Tx power with DC-DC at 3 V supply
  • Power on Reset (POR)
  • Brown-out Detection (BOD)

Clock

  • 16/32 MHz crystal oscillator
  • On-chip 32 MHz RC oscillator
  • Low power 32.768 kHz crystal oscillator
  • Low power on-chip 32 kHz RC oscillator

Package

  • 6 x 6 mm HVQFN48
  • 3.2 x 3.2 mm WLCSP

Operating temperature

  • -40°C to +85°C

Analog Peripherals

  • 8-channel 16-bit general purpose ADC
  • 2 general purpose ultra-low power analog comparator (ACMP)
  • General purpose DAC
  • Up to 8 cap touch buttons
  • Battery monitor
  • Temperature sensor

Digital Peripherals

  • Up to 35 GPIO pins
  • GPIO pins can be used as interrupt/wakeup sources
  • High I/O drive capabilities
  • 2 Quadrature Decoder
  • 4 general purpose 32-bit timers
  • 32 kHz sleep timer(32-bit timer)
  • Watchdog timer (WDT)
  • Real Time Clock (RTC)
  • ScTimer/PWM
  • 2 USART interface
  • 2 SPI interface (leader/follower)
  • 2 I2C controller/target interface
    • Quad-SPI to interface to SPI flash
  • USB 2.0 full-speed device
  • AES-128 security coprocessor
  • True random number generator (TRNG)

Part numbers include: QN9080CHN, QN9080DHN, QN9083CUK, QN9083DUK.

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