EFR32FG28 Sub-GHz Wireless + 2.4 GHz BLE SoCs

The EFR32FG28 SoC is an ideal dual band Sub-GHz + 2.4 GHz Bluetooth LE SoC solution for IoT applications in smart homes, security, lighting, building automation, and metering. This dual band solution combines a high-performance Sub-GHz radio that provides long range capabilities and a Bluetooth radio for increased design flexibility. The large memory footprint and increased IO count allows for design consolidation and Secure Vault™ gives flexibility to choose the security level that meets your product’s needs.

Up to 1024 kB of Flash and 256 kB of RAM
Sub-GHz and Bluetooth LE Support
Tech Talk

Design Long Range Devices for Amazon Sidewalk with FG28

Amazon Sidewalk is a shared network that extends the low-bandwidth working range of devices. Learn how to design long-range devices with Amazon Sidewalk on our new dual-band SoC, the FG28.

EFR32FG28 Common Specs

Low Power Wireless System-on-Chip

  • High Performance 32-bit 78 MHz ARM Cortex®-M33 with DSP instruction and floating-point unit for efficient signal processing
  • Up to 1024 kB flash program memory
  • Up to 256 kB RAM data memory
  • Sub-GHz radio operation with TX power up to +20 dBm
  • 2.4 GHz BLE radio operation with TX power up to +10 dBm
  • Matrix Vector Processor for AI/ML acceleration

Low Energy Consumption

  • 4.4 mA RX current at 920 MHz (400 kbps 4-FSK)
  • 4.0 mA RX current at 915 MHz (4.8 kbps O-QPSK)
  • 5.4 mA RX current at 915 MHz (2 Mbps GFSK)
  • 3.9 mA RX current at 868 MHz (2.4 kbps GFSK)
  • 3.9 mA RX current at 868 MHz (38.4 kbps FSK)
  • 4.2 mA RX current at 433 MHz (100 kbps 2GFSK)
  • 5.2 mA RX current at 2.4 GHz, 1 Mbps BLE
  • 25.7 mA TX current @ 14 dBm output power at 915 MHz (14 dBm part number)
  • 81.8 mA TX current @ 20 dBm output power at 915 MHz with (20 dBm part number)
  • 12.3 mA TX current @ 0 dBm output power, 2.4 GHz
  • 23.2 mA TX current @ 10 dBm output power, 2.4 GHz
  • 33 μA/MHz in Active Mode (EM0) at 39.0 MHz
  • 2.8 μA EM2 DeepSleep current (256 kB RAM retention and RTC running from LFXO)
  • 1.3 μA EM2 DeepSleep current (16 kB RAM retention and RTC running from LFRCO)
  • Preamble Sense Mode (PSM) low duty-cycle listen

High Receiver Performance

  • -98.1 dBm sensitivity @ 400 kbps 920 MHz 4-GFSK
  • -124.8 dBm sensitivity @ 4.8 kbps 915 MHz O-QPSK
  • -96.0 dBm sensitivity @ 2 Mbps 915 MHz GFSK
  • -124.1 dBm sensitivity @ 2.4 kbps 868 MHz GFSK
  • -110.4 dBm sensitivity @ 38.4 kbps 868 MHz FSK
  • -110.6 dBm sensitivity @ 100 kbps 433 MHz 2GFSK

Wide Selection of MCU peripherals

  • Analog to Digital Converter (ADC)
    • 12-bit @ 1 Msps
    • 16-bit @ 76.9 ksps
  • 2 × Analog Comparator (ACMP)
  • 2-Channel Digital to Analog Converter (VDAC)
  • Low-Energy Sensor Interface (LESENSE)
  • Up to 49 General Purpose I/O pins with output state retention and asynchronous interrupts
  • 8 Channel DMA Controller
  • 12 Channel Peripheral Reflex System (PRS)
  • 4 × 16-bit Timer/Counter with 3 Compare/Capture/PWM channels
  • 1 × 32-bit Timer/Counter with 3 Compare/Capture/PWM channels
  • 32-bit Real Time Counter
  • 24-bit Low Energy Timer for waveform generation
  • 16-bit Pulse Counter with asynchronous operation (PCNT) Newer Addition
  • 2 × Watchdog Timer
  • 3 × Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART)
  • 1 x Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard (ISO 7816)/IrDA/I2S)
  • 2 x I2C interface with SMBus support
  • Integrated Low-Energy LCD Controller supporting up to 192 segments
  • Keypad scanner supporting up to 6 x 8 matrix (KEYSCAN)
  • Die temperature sensor with ± 2 °C accuracy across temperature range

Supported Modulation Format

  • 2/4 (G)FSK with fully configurable shaping
  • OQPSK with DSSS
  • (G)MSK
  • OOK

Protocol Support

  • Proprietary
  • CONNECT
  • Amazon Sidewalk
  • WM-BUS
  • Wi-SUN
  • Bluetooth Low Energy

Wide Operating Range

  • 1.71 to 3.8 V single power supply
  • -40 °C to +125 °C

Packages

  • QFN68 8 mm x 8 mm x 0.85 mm
  • QFN48 6 mm x 6 mm x 0.85 mm

Secure Vault

Status

Find the Right EFR32FG28 Device Select Columns
Select Columns
Part Number Pricing Integrated MCU MCU Core Flash (kB) RAM (kB) Communications Sub-GHz TX Power RX Current (mA) Peak RX Sensitivity Proprietary 2.4 GHz Proprietary Sub-GHz Security GPIO DAC Temp Sensor Timers (16-bit) Temperature Range ºC Package Type Package Size (mm)
1K @ US$3.73 ARM Cortex-M33 1024 128 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 85 QFN48 6x6
1K @ US$3.96 ARM Cortex-M33 1024 128 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 85 QFN68 8x8
1K @ US$4.31 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 85 QFN48 6x6
1K @ US$4.54 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 85 QFN68 8x8
1K @ US$4.78 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 85 QFN48 6x6
1K @ US$5.01 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 85 QFN68 8x8
1K @ US$4.5 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 20 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 85 QFN48 6x6
1K @ US$4.73 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 20 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 85 QFN68 8x8
1K @ US$4.98 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 20 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 85 QFN48 6x6
1K @ US$5.21 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI -15 x USART 20 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 85 QFN68 8x8
1K @ US$4.66 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 125 QFN48 6x6
1K @ US$4.89 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 125 QFN48 6x6
1K @ US$5.14 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 125 QFN68 8x8
1K @ US$5.37 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 14 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 125 QFN68 8x8
1K @ US$4.86 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 20 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 125 QFN48 6x6
1K @ US$5.08 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 20 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 125 QFN68 8x8
1K @ US$5.34 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 20 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 31 VDAC 4 -40 125 QFN48 6x6
1K @ US$5.57 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 5 x USART 20 4.0 -124.8 (4.8 kbps OQPSK @ 915 MHz) AES-128 AES-256 ECC SHA-1 SHA-2 49 VDAC 4 -40 125 QFN68 8x8

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