BAL-2690D3U STMicroelectronics

BAL-2690D3U 50 / 30+j25 balun transformer for 2.45 GHz ISM band Features 50 nominal input / 30+j25 output differential impedance Low insertion loss Low amplitude imbalance Low phase imbalance Small footprint: BAL-2690D3U < 1 mm Flip-Chip 4 bumps Benefits Very low profile (<700 m) Figure 1. Top view High RF performances Top View RF BOM and area reduction A2A2 A1A1 GND BAL-- Applications Balun transformer for applications such as: ZZ CC Bluetooth STLC2690 B2B2 B1B1 SE BAL + Mobile phone Description Bump Name Description A1 BAL- RF balanced ouput The BAL-2690D3U is a balun designed to A2 GND Ground transform single ended signals to differential B1 BAL+ RF balanced ouput signals in Bluetooth applications. B2 SE RF input The BAL-2690D3U has been customized for the STLC2690 Bluetooth transceiver with 0.8 dB Figure 2. Application schematic insertion losses in the bandwidth (2400 MHz - 2500 MHz) and with a specific requirement for the S parameter. CC22 WLAN PA + SP3T The BAL-2690D3U has been designed using STMicroelectronics IPD (integrated passive Band BT BT device) technology on non conductive glass Pass Balun Filter RFIC 2.4G substrate to optimize RF performances. Antenna TM: IPAD is a trademark of STMicroelectronics. February 2010 Doc ID 16056 Rev 2 1/8 www.st.com 8Electrical characteristics BAL-2690D3U 1 Electrical characteristics Table 1. Absolute maximum ratings (limiting values) Symbol Test condition Min. Typ. Max. Unit P Input power R - - 20 dBm IN FIN ESD ratings MIL STD883G (HBM: C = 100 pF, R = 1.5k , air discharge) 2000 ESD ratings, machine model V -- V ESD (MM: C = 200 pF, R = 25 L = 500 nH) 500 ESD ratings, charged device model (CDM) (JESD22-C101D) 500 T Operating temperature -40 - +85 C OP Table 2. Electrical characteristics (T = 25 C) impedances amb Symbol Test condition Min. Typ. Max. Unit Z Nominal differential output impedance - 30 + j25 - OUT Z Nominal input impedance - 50 - IN Table 3. RF performance Symbol Test condition Min. Typ. Max. Unit F Frequency range (bandwidth) 2402 2441 2480 MHz I Insertion loss in bandwidth - 0.8 1.1 dB L ripple Ripple in bandwidth - - 0.6 dB R Return loss in bandwidth 14 - - dB L Phase imbalance -10 - 10 imb A Amplitude imbalance -1 - 1 dB imb R Common mode rejection ratio (S)20--dB CMRR SC12 Magnitude for common mode harmonic rejection 0.7 - 1 From 4804 MHz to coefficient 2f O 4960 MHz, 25 is S CC22 considered as Phase for common mode reference for CM harmonic rejection -45 - 0 coefficient 2f O 2/8 Doc ID 16056 Rev 2