ST Life.augmented


50 / 30+j25 Balun transformer for 2.45 GHz ISM band
  • active Active

The BAL-2690D3U is a balun designed to transform single ended signals to differential signals in Bluetooth applications.

The BAL-2690D3U has been customized for the STLC2690 Bluetooth transceiver with 0.8 dB insertion losses in the bandwidth(2400 MHz - 2500 MHz) and with a specific requirement for the SCC22 parameter.

The BAL-2690D3U has been designed using STMicroelectronics IPD (integrated passive device) technology on non conductive glass substrate to optimize RF performance.

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Errata Sheet
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Key Features

  • 50 Ω nominal input / 30+j25 output differential impedance
  • Low insertion loss
  • Low amplitude imbalance
  • Low phase imbalance
  • Small footprint: BAL-2690D3U < 1 mm²

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS6408: 50 Ω nominal input / conjugate match balun to STLC2690
3.0 472 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 transceivers
2.1 688 KB

Technical Notes & Articles

Description Version Size
TN1173: Packing information for IPAD™, protection, rectifiers, thyristors and AC Switches
3.1 333 KB

Publications and Collaterals


Description Version Size
IPADTM – integrated passive devices for RF applications
1.0 1,303 KB


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

Sample & Buy

Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@ 5000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
BAL-2690D3UActiveChip Scale Package 0.4mm pitchTape And Reel_-.168Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order

(*) 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.