BALF-NRF01D3 50 nominal input / conjugate match balun to nRF51822-QFAA /QFAB and nRF51422-QFAA/QFAB with integrated harmonic filter Datasheet production data Description STMicroelectronics BALF-NRF01D3 is an ultraminiature balun. The BALF-NRF01D3 integrates matching network in a monolithic glass substrate. Matching impedance has been customized for the nRF51822-QFAA/QFAB, and nRF51422-QFAA/QFAB RF transceivers. The BALF-NRF01D3 uses STMicroelectronics IPD technology on non-conductive glass substrate which optimize RF performance. Lead-free Flip-Chip package 5 bumps Figure 1. Pinout diagram (top view) 2 1 3 Features Low insertion loss A DIFF GND Low amplitude imbalance SE B Low phase imbalance Coated Flip-Chip on Glass DIFF VCC C 2 Small footprint: < 1.5 mm Benefits Very low profile: < 560 m after reflow High RF performance PCB space saving versus discrete solution BOM count reduction Efficient manufacturability Applications 2.45 GHz balun with integrated matching network Matching optimized for following chipsets: nRF51822-QFAA/QFAB, and nRF51422- QFAA/QFAB July 2015 DocID026031 Rev 4 1/11 This is information on a product in full production. www.st.com 11Characteristics BALF-NRF01D3 1 Characteristics Table 1. Absolute maximum ratings (limiting values) Value Symbol Parameter Unit Min. Typ. Max. P Input Power RF 20 dBm IN IN ESD ratings MIL STD883C (HBM: C = 100 pF, R = 1.5 k , air discharge) 2000 V ESD ratings charge device model (JESD22-C101-C) 500 V ESD ESD ratings machine model (MM: C = 200 pF, R = 25 , L = 500 nH) 500 T Operating temperature -40 +105 C OP Table 2. Electrical characteristics (T = 25 C) amb Value Symbol Parameter Unit Min. Typ. Max. conjugate match to: nRF51822-QFAA/QFAB Z Nominal differential output impedance OUT nRF51422-QFAA/QFAB Z Nominal input impedance 50 IN F Frequency range (bandwidth) 2400 2540 I Insertion loss in bandwidth 1.35 1.46 dB L R Return loss in bandwidth 16.5 17 17.5 dB L imb Phase imbalance 4.5 5 5.5 Aimb Amplitude imbalance 0.15 0.2 0.25 dB 2f0 2nd harmonic filtering -15 -14 dB 3f0 3rd harmonic filtering -42 -41 dB 2/11 DocID026031 Rev 4