Description
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 performances.

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

Benefits
■ Very low profile (<700 µm)
■ High RF performances
■ RF BOM and area reduction

Applications
Balun transformer for applications such as:
■ Bluetooth STLC2690
■ Mobile phone