BALFHB-WL-02D3

Overview

The BALFHB-WL-02D3 is an ultra-miniature integrated balun designed for the STM32WL sub-GHz wireless microcontroller. It combines a matching network, balun, and harmonics filter on a non-conductive glass substrate using IPD technology. The device operates within the 862–928 MHz frequency range. It features a 50 Ω nominal input impedance conjugately matched to the STM32WL and a 50 Ω antenna-side impedance for both Tx and Rx paths. The component utilizes a CSPG-8 package with a thickness of ≤ 630 μm after reflow.

Feature Summary

• Integrates matching network, balun, and deep Tx harmonic suppression filter
• Customized impedance matching specifically for QFN STM32WL sub-GHz microcontrollers
• Optimized for high-power mode operation on 4-layer PCBs
• Low insertion loss and high RF performance in a thin chip-scale package

Applications

• Sub-GHz wireless communication modules
• IoT sensor nodes requiring low power consumption
• STM32WL-based wireless applications
• Compact RF front-end designs

Procurement Notes

Verify that the procurement source provides official STMicroelectronics documentation confirming the part number BALFHB-WL-02D3. Ensure the supplier is an authorized distributor or certified partner to guarantee authenticity. Check for ECOPACK2 compliance status if environmental regulations are critical. Confirm the package type matches the specified CSPG-8 form factor. Request material declarations and datasheets directly from the manufacturer or authorized channels to avoid counterfeit components.

Selection Notes

Select this component when designing for STM32WL sub-GHz wireless applications requiring minimal board space. It is suitable for systems needing integrated harmonic filtering and impedance matching without external discrete components. The device is optimized for 4-layer PCB stacks and high-power modes. Consider the thin profile for height-constrained enclosures. Ensure the application frequency falls within the 862–928 MHz range for optimal performance.

Part Context

This balun belongs to the BALFHB-WL series, which includes variants like the BALFHB-WL-03D3. These components are part of STMicroelectronics' ecosystem for sub-GHz wireless solutions, specifically tailored to complement the STM32WL microcontroller family. The series emphasizes integration and miniaturization for IoT applications.

Replacement Considerations

The BALFHB-WL-03D3 is a related variant within the same series. Verify specific impedance and frequency requirements before substitution. No other direct substitutes are confirmed in public documentation.