The EFR32BG24L Series 2 from Silicon Labs are Bluetooth 6.0 Wireless System-on-Chips (SoCs) that operate in the 2.4 GHz band. They are optimized for channel sounding and Bluetooth Low Energy (BLE) applications. These SoCs consist of a 32-bit ARM Cortex-M33 processor in the core with 768 KB flash and 96 KB RAM, a radio subsystem, clock management, energy management, security, timers and triggers, serial interfaces, and an analog I/F block. The core unit also includes a matrix vector processor that supports AI/ML acceleration. These combo chips communicate using Bluetooth Mesh technology and have sensing capabilities through direction finding using the angle of arrival (AoA) and angle of departure (AoD) parameters. They support (G)FSK, OQPSK DSSS, and (G)MSK modulation schemes.
The EFR32BG24L Series 2 chips embed 12/16-bit ADCs with DACs and DMA controllers for data readouts and have a rich set of serial interfaces – USART, I2C, SMBus, and SPI for control. These SOCs deliver an output power of up to 10 dBm and have a receive sensitivity of -105.7 dBm. They require a DC supply from 1.7 to 3.8 V and consume 5 mA (Tx mode) and 4.4 mA (Rx mode) of current. These wireless SoCs are available in 40-pin QFN packages that measure 5.00 x 5.00 x 0.85 mm. They are suitable for use in smart homes, gateways and hubs, blood glucose meters, and pulse oximeters.
