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Home » NEWEST Products » New by Manufacturer » STMicroelectronics » Balun Transformers - STM
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STMicroelectronics Balun Transformers

STMicroelectronics Balun Transformers

STMicroelectronics Baluns use ST’s process integrating high-quality RF passive components on a single glass substrate. As well as balanced/unbalanced conversion, they can also integrate a matching network in a footprint smaller than 1mm2 for the complete function.

STMicroelectronics BALF-SPI-01D3 Balun Transformer is an ultra-miniature balun. The BALF-SPI-01D3 integrates matching network and harmonics filters. Matching impedance has been customized for the Spirit1 ST transceiver. The BALF-SPI-01D3 uses STMicroelectronics IPD technology on non-conductive glass substrate which optimize RF performances.

Features
  • 50Ω nominal input / conjugate match to Spirit1
  • Low insertion loss
  • Low amplitude imbalance
  • Low phase imbalance
  • Small footprint
  • Very low profile (< 670μm)
  • High RF performance

  • RF BOM and area reduction

Applications
  • 868MHz and 915MHz impedance matched balun filter
  • Optimized for Spirit1 sub GHz RFIC
 
Application Schematic
Application Schematic

STMicroelectronics BALF-NRF01D3 Ultra Miniature Balun that integrates a matching network in a monolithic glass substrate. Matching impedance for this device has been customized for the nRF51822-QFAAG0/GC/FA, nRF51822-QFABB0 and nRF51422-QFAAE0 RF transceivers. The BALF-NRF01D3 uses STMicroelectronics IPD technology on non-conductive glass substrate which optimize RF performances.

Features
  • Low insertion loss
  • Low amplitude imbalance
  • Low phase imbalance
  • Coated Flip-Chip on Glass
  • Small footprint: < 1.5mm2
  • Very low profile: < 560μm after reflow
  • High RF performance
  • PCB space saving versus discrete solution
  • BOM count reduction
  • Efficient manufacturability
Applications
  • 2.45 GHz balun with integrated matching network
  • Matching optimized for following chipsets
    • nRF51822-QFAAG0/GC/FA
    • nRF51822-QFABB0
    • nRF51422-QFAAE0
 
Application Schematic Application Schematic

STMicroelectronics BALF-NRG-01D3 BlueNRG Balun Transformer is an ultra-miniature balun that integrates a matching network and harmonics filter. Matching impedance has been customized for the BlueNRG ST transceiver (both QFN and WLCSP version). It is using STMicroelectronics IPD technology on non conductive glass substrate which optimize RF performances.

Features
  • 50Ω nominal input / conjugate match to BluNRG device
  • Low insertion loss
  • Low amplitude imbalance
  • Low phase imbalance
  • Wafer level chip scale package (WLCSP)
  • Very low profile: < 670μm
  • High RF performance

  • RF BOM reduction
  • Small footprint

Applications
  • Bluetooth low energy impedance matched balun filter
  • Optimized for ST BlueNRG RFIC
 
Application Schematic with QFN Package Application Schematic
 
Application Schematic with WLCSP Package Application Schematic
 
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  • STMicroelectronics