BALFHB-WL-01D3

Overview

The STMicroelectronics BALFHB-WL-01D3 is an ultra-miniature balun designed for sub-GHz wireless applications. It integrates a matching network, balun, and harmonics filter on a non-conductive glass substrate using IPD technology. The device features a 50 Ω nominal input and provides a conjugate match to the BGA STM32WL microcontroller. It supports frequency bands of 862-928 MHz and is optimized for high-power mode operation with a BGA-4L package. The component ensures low insertion loss and deep Tx harmonic suppression.

Feature Summary

• Integrates matching network, balun, and harmonics filter in a single monolithic unit
• Customized impedance matching specifically for STM32WL sub-GHz wireless microcontrollers
• Utilizes IPD technology on a non-conductive glass substrate for optimized RF performance
• Features deep Tx harmonic suppression and low insertion loss characteristics

Applications

• Sub-GHz wireless communication systems
• IoT sensor nodes requiring compact RF front ends
• Applications utilizing STM32WL sub-GHz wireless microcontrollers
• High-power mode transmission scenarios

Procurement Notes

Verify that the specific application utilizes the STM32WL sub-GHz wireless microcontroller, as this component is customized for its impedance matching. Confirm PCB stack-up requirements, as the datasheet specifies optimization for a 4-layer PCB design. Ensure compliance with ECOPACK2 standards if environmental regulations are a constraint. Check for the W5 marking on the component to confirm authenticity and specific variant identification.

Selection Notes

Select this component when space constraints and bill-of-materials reduction are critical priorities. It is suitable for designs requiring integrated harmonic filtering without discrete components. Consider the thin profile after reflow when determining mechanical clearance. This part is ideal for optimizing RF performance in sub-GHz bands while minimizing board area compared to discrete solutions.

Part Context

This balun belongs to STMicroelectronics' family of ultra-miniature RF components designed for wireless microcontrollers. It complements other variants like the BALFHB-WL-05D3, which serves similar functions but may differ in specific impedance matching or packaging details. These devices leverage proprietary IPD technology to replace traditional discrete baluns and filters, offering a consolidated solution for RF transceivers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should verify compatibility with existing PCB layouts and impedance requirements before considering alternative components from other manufacturers.