BAL-2690D3U

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 Flip Chip 4 bumps Benefits ■ ■ ■ Very low profile (<700 µm) High RF performances RF BOM and area reduction GND Figure 1. Top view Top View Applications Balun transformer for applications such as: ■ ■ A2 A2 A1 A1 ZC C BAL - Bluetooth STLC2690 Mobile phone SE B2 B2 B1 B1 BAL + Description The BAL-2690D3U is a balun designed to www.DataSheet4U.com 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. Bump Name Description A1 A2 B1 B2 BALGND BAL+ SE RF balanced ouput Ground RF balanced ouput RF input Figure 2. Application schematic WLAN PA + SP3T 2.4G Antenna Band Pass Filter BT Balun BT RFIC TM: IPAD is a trademark of STMicroelectronics. January 2010 Doc ID 16056 Rev 1 1/8 www.st.com 8 Electrical characteristics BAL-2690D3U 1 Electrical characteristics Table 1. Symbol PIN Input power RFIN ESD ratings MIL STD883C (HBM: C = 100 pF, ...