BALF-NRF01J5

Balun Overview

The BALF-NRF01J5 is an ultraminiature extra-thin balun from STMicroelectronics, designed for Bluetooth Low Energy applications. It integrates a matching network and harmonics filter to optimize RF performance using IPD technology on high-resistivity silicon. The device features a nominal 50 Ω input with a conjugate match specifically customized for Nordic Semiconductor nRF51822 WLCSP circuits (CTAA and CTAC). It operates within the 2.4 GHz to 2.54 GHz frequency range. Key electrical characteristics include low insertion loss, low amplitude imbalance, and low phase imbalance. The component has been tested and approved by Nordic Semiconductor.

Balun Feature Summary

• Integrates matching network and harmonics filter in a single ultraminiature package
• Customized conjugate impedance match for Nordic Semiconductor nRF51822 WLCSP circuits
• Optimized RF performance based on IPD technology on high-resistivity silicon
• Extra-low profile design suitable for space-constrained System-in-Package modules

Balun Applications

• Bluetooth Low Energy (BLE) transceivers
• System-in-Package (SiP) modules
• Wireless sensor networks
• IoT devices requiring compact RF front-ends

Balun Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or partners. Confirm that the specific application environment meets the reliability standards outlined in the datasheet, as customer-specific qualification remains the responsibility of the end-user. Ensure compatibility with the target Nordic Semiconductor chip variants before integration into final designs.

Balun Selection Notes

Select this balun when designing around Nordic Semiconductor nRF51822 chips requiring a compact solution. It is appropriate for applications demanding minimal footprint and profile reduction. Consider its integrated harmonic filtering capabilities to simplify the RF circuit design. Verify that the operating frequency aligns with the 2.4 GHz to 2.54 GHz specification for optimal performance.

Balun Part Context

This component belongs to STMicroelectronics' ultra-thin balun series, engineered for miniaturization in wireless communication systems. It utilizes Integrated Passive Device (IPD) technology to achieve high performance in a small form factor. The product line focuses on reducing Bill of Materials (BOM) and area requirements for modern mobile and IoT devices.

Balun Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Customers should consult STMicroelectronics representatives for potential alternatives or obsolescence management strategies.