Features

• QFN STM32WL sub-GHz wireless microcontrollers impedance matched balun

and Tx harmonics filter

• Optimized for QFN STM32WL sub-GHz wireless microcontrollers in low power

mode and dedicated to 4-layers PCB

• 50 Ω nominal input / conjugate matched balun to QFN STM32WL

• 50 Ω nominal impedance on antenna side Tx and Rx

• Deep Tx rejection harmonic filter

• Low insertion loss

• Small footprint

• Low profile ≤ 630 μm after reflow

• High RF performance

• RF BOM and area reduction

• ECOPACK2 compliant component

Applications

• STM32WL sub-GHz wireless microcontrollers

• LPWAN-compliant radio solution, enabling the following modulations: LoRa®,

(G)FSK, (G)MSK, and BPSK

Description

STMicroelectronics BALFHB-WL-05D3 is an ultra-miniature balun. This device

integrates a matching network, balun, and harmonics filter. Matching impedance has

been customized for the STM32WL sub-GHz wireless microcontrollers.

It is using STMicroelectronics IPD technology on a nonconductive glass substrate,

which optimizes RF performances.