EFR32BG27 Series 2 Bluetooth® Wireless SoC

The EFR32BG27 family of wireless SoCs opens up new possibilities by offering an ultra-small WLCSP package (2.3 mm x 2.6 mm) capable of running on button cell batteries. Now device makers can address applications with extremely small form-factor requirements without sacrificing performance and security. The BG27 Bluetooth SoC features an integrated DCDC boost that allows operation down to 0.8 volts, enabling support for single-cell alkaline and 1.5-volt button cell batteries that are typically used in medical applications for battery-operated patches and continuous glucose monitoring (CGM) devices. Additionally, the wakeup pin on the BG27 allows products in a warehouse or transit to remain off for months, consuming less than 20 nA, ensuring the battery remains fully charged for use. The integrated coulomb counter enables accurate battery level monitoring to avoid unexpected battery depletion for critical applications. Target applications include connected medical devices, wearables, sensors, switches, smart locks, and both commercial and LED lighting.

Supports Bluetooth 5.4, Bluetooth mesh & proprietary
Ideal for low-power battery-powered IoT devices

EFR32BG27 Common Specs

Low Power Wireless System-on-Chip

  • High Performance 32-bit 76.8 MHz ARM Cortex®-M33 with DSP instruction and floating-point unit for efficient signal processing
  • Up to 768 kB flash program memory
  • Up to 64 kB RAM data memory
  • 2.4 GHz radio operation

Radio Performance

  • -106.9 dBm sensitivity @ 125 kbps GFSK
  • -99.2 dBm sensitivity @ 1 Mbit/s GFSK
  • -96.3 dBm sensitivity @ 2 Mbit/s GFSK
  • TX power up to +8 dBm

Low System Energy Consumption

  • 3.6 mA RX current (1 Mbps GFSK)
  • 4.1 mA TX current @ 0 dBm output power
  • 9.2 mA TX current @ 6 dBm output power
  • 11.3 mA TX current @ 8 dBm output power
  • 29 μA/MHz in Active Mode (EM0) at 76.8 MHz
  • 1.6 μA EM2 DeepSleep current (64 kB RAM retention and RTC running from LFRCO)
  • 0.18 μA EM4 current

Wide Selection of MCU Peripherals

  • 16-bit Analog to Digital Converter (IADC)
  • Analog Comparator (ACMP)
  • Up to 26 General Purpose I/O pins with output state retention and asynchronous interrupts
  • 8 Channel DMA Controller
  • 12 Channel Peripheral Reflex System (PRS)
  • 3 × 16-bit Timer/Counter with 3 Compare/Capture/PWM channels
  • 2 × 32-bit Timer/Counter with 3 Compare/Capture/PWM channels
  • 32-bit Real Time Counter
  • 24-bit Low Energy Timer for waveform generation
  • 1 × Watchdog Timer
  • 2 × Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard (ISO 7816)/IrDA/I2S)
  • 1 × Enhanced Universal Asynchronous Receiver/Transmitter (EUART)
  • 2 × I2C interface with SMBus support
  • Digital microphone interface (PDM)
  • Precision Low-Frequency RC Oscillator to replace 32 kHz sleep crystal
  • RFSENSE with selective OOK mode
  • Die temperature sensor with +/- 1.5 °C accuracy after single-point calibration
  • Coulomb counter integrated into DC-DC

Supported Modulation Format

  • (G)FSK with fully configurable shaping
  • OQPSK DSSS
  • (G)MSK

Protocol Support

  • Bluetooth Low Energy (Bluetooth 5.4)
  • Bluetooth mesh
  • Proprietary

Wide Operation Range

  • 1.8 V to 3.8 V single power supply for devices with Buck DC-DC
  • 0.8 V to 1.7 V single power supply for devices with Boost DC-DC
  • -40 °C to 125 °C

Packages

  • QFN40 5 mm × 5 mm × 0.85 mm
  • QFN32 4 mm × 4 mm × 0.85 mm
  • WLCSP39 2.3 mm x 2.6 mm x 0.5 mm

 

BG27 Security Features

Status

Find the Right EFR32BG27 Device Select Columns
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Part Number Pricing MCU Core Core Frequency (MHz) Flash RAM DCDC Bluetooth Package Type Package Size (mm) Secure Vault™ Output Power Max (dBm) Temperature Range ºC
1K @ US$1.83 ARM Cortex-M33 76.8 768 64 Buck 5.4 QFN32 4x4 Mid 8 -40 125
1K @ US$1.87 ARM Cortex-M33 76.8 768 64 Buck 5.4 QFN40 5x5 Mid 8 -40 125
1K @ US$1.89 ARM Cortex-M33 76.8 768 64 Boost 5.4 QFN32 4x4 Mid 6 -40 125
1K @ US$1.93 ARM Cortex-M33 76.8 768 64 Boost 5.4 QFN40 5x5 Mid 6 -40 125
1K @ US$2.02 ARM Cortex-M33 76.8 768 64 Buck or Boost 5.4 WLCSP39 2.3x2.6 Mid 4 -40 85

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