BALFHB-WL-04D3

Overview

The BALFHB-WL-04D3 is an ultra-miniature integrated balun designed for the STM32WL BGA package. It operates within the 862-928 MHz frequency range and incorporates a matching network, balun, and harmonics filter. The device features a nominal input impedance of 50 Ω and provides a conjugate match to the BGA-4L STM32WL in low power mode. It utilizes a Chip Scale Package (CSP) with surface mount technology, weighing approximately 4 mg.

Feature Summary

• Integrates matching network, balun, and harmonics filter into a single ultra-miniature component
• Provides conjugate impedance matching specifically optimized for the BGA-4L STM32WL in low power mode
• Designed for operation within the 862-928 MHz ISM band

Applications

• Low power wireless communication modules using STM32WL
• ISM band RF front-end signal conditioning
• Ultra-compact IoT sensor nodes requiring minimal PCB footprint

Procurement Notes

Verify that the target application utilizes the BGA-4L STM32WL package variant, as this balun is conjugately matched specifically for that configuration. Confirm the operating frequency falls strictly within the 862-928 MHz range. Ensure the PCB design supports the required four-layer stack-up for optimal performance. Check the latest product change notifications for any updates to the component specifications or manufacturing processes.

Selection Notes

Select this component when designing for the STM32WL family with a BGA-4L package. It is suitable for applications requiring high integration to reduce board space. Consider the specific impedance requirements of the STM32WL low power mode. This part is not interchangeable with other variants in the BALFHB series without re-evaluating the matching network and package compatibility.

Part Context

This component belongs to STMicroelectronics' BALFHB series of integrated baluns. These devices are engineered to simplify RF design by combining passive components into a single package. The BALFHB-WL-04D3 is a specialized variant tailored for the WL series microcontrollers, ensuring efficient signal transmission in compact wireless applications.

Replacement Considerations

Public confirmed substitute part numbers: BALFHB-WL-05D3, BALFHB-WL-06D3.