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50Ω nominal input / conjugate match balun to nRF51822-CEAA, with integrated harmonic filter
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STMicroelectronics BAL-NRF02D3 is an ultraminiature balun. The BAL-NRF02D3 integrates matching network and harmonics filter. Matching impedance has been customized for the following Nordic Semiconductor circuits: nRF51422-CEAA, nRF51422-CDAB, nRF51422-CFAC and nRF51822-CEAA, nRF51822-CDAB, nRF51822-CFAC.

The BAL-NRF02D3 uses STMicroelectronics IPD technology on non-conductive glass substrate which optimize RF performances.

The BAL-NRF02D3 has been tested and approved by Nordic Semiconductor in the nRFgo modules.

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Errata Sheet
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Key Features

  • 50 Ω nominal input / conjugate match to Nordic Semiconductor chips nRF51422-CEAA, nRF51422-CDAB, nRF51422-CFAC and nRF51822-CEAA, nRF51822-CDAB, nRF51822-CFAC
  • Low insertion loss
  • Low amplitude imbalance
  • Low phase imbalance
  • Small footprint: < 1.2 mm2
  • Benefits
  • Very low profile: < 560 μm after reflow
  • High RF performance
  • RF BOM and area reduction

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS9745: 50 ohm nominal input / conjugate match balun to nRF51822-CEAA/CDAB/CFAC and nRF51422-CEAA/CDAB/CFAC
5.0 544 KB

Application Notes

Description Version Size
AN1235: IPAD™ 500 µm Flip Chip: package description and recommendations for use
8.0 252 KB
AN2348: IPAD™ 400 µm Flip Chip: package description and recommendations for use
5.0 262 KB
AN4315: BAL-NRF02D3 matched balun with integrated harmonics filter for Nordic Semiconductor chips with ultralow power transeivers
2.0 688 KB

Technical Notes & Articles

Description Version Size
TN1173: Axial, through hole, surface mount and chip scale packages for IPAD™, protection, rectifiers, thyristors and AC Switches
2.0 317 KB

Publications and Collaterals


Description Version Size
Products and Solutions for Factory Automation and Control
Jan 2015 3,105 KB
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1.0 665 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@ 5000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
BAL-NRF02D3ActiveFlip-Chip 400uTape And Reel_-.127No availability reported, please contact our Sales officeEcopack2PDF

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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