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BAL-2690D3U Datasheet(PDF) 1 Page - STMicroelectronics |
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BAL-2690D3U Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 8 page February 2010 Doc ID 16056 Rev 2 1/8 8 BAL-2690D3U 50 / 30+j25 balun transformer for 2.45 GHz ISM band 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 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. Figure 1. Top view Figure 2. Application schematic TM: IPAD is a trademark of STMicroelectronics. Flip-Chip 4 bumps SE GND BAL + BAL - Z C Top View A1 B1 B2 A2 - ZC A1 B1 B2 A2 SE B2 B1 A2 BAL+ GND BAL- RF input RF balanced ouput Ground RF balanced ouput A1 Name Description Bump Band Pass Filter BT RFIC BT Balun 2.4G Antenna WLAN PA + SP3T www.st.com |
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