BALF-SPI2-01D3 Datasheet 50 nominal input / conjugate matched balun to ST S2-LP,860-930 MHz with integrated harmonic filter Features 50 nominal input / conjugate matched to ST S2-LP for 860 - 930 MHz frequency operation Low insertion loss Low amplitude imbalance Low phase imbalance Flip-Chip (6 bumps) package Small footprint Very low profile < 620 m after reflow High RF performance RF BOM and area reduction GND ANT GND ECOPACK 2 compliant component Applications RXP RXN TX 860 - 930 MHz impedance matched balun filter Optimized for ST S2-LP sub GHz RFIC Description This device is an ultra-miniature balun. The BALF-SPI2-01D3 integrates matching network and harmonics filter. Matching impedance has been customized for the ST S2-LP transceiver. The BALF-SPI2-01D3 uses STMicroelectronics IPD technology on non-conductive glass substrate which optimize RF performance. Product status BALF-SPI2-01D3 DS12249 - Rev 2 - February 2018 www.st.com For further information contact your local STMicroelectronics sales office.BALF-SPI2-01D3 Characteristics 1 Characteristics Table 1. Absolute ratings (T = 25 C) amb Symbol Parameter Value Unit P Input power RF 20 dBm IN IN ESD ratings human body model (JESD22-A114-C), all I/O one at a time while others connected 2000 to GND V V ESD ESD ratings machine model, all I/O 200 T Operating temperature -40 to +105 C OP Table 2. Impedances (T = 25 C) amb Value Symbol Parameter Unit Min. Typ. Max. Z Nominal differential RX balun impedance RX - matched ST S2-LP - Z Nominal TX filter impedance TX Z Antenna impedance - 50 - ANT Table 3. Electrical characteristics and RF performances (T = 25 C) amb Value Symbol Parameter Test condition Unit Min. Typ. Max. f Frequency range (bandwidth) 860 930 MHz I Insertion loss in bandwidth without mismatch loss (RX balun) 1.7 2.0 dB L RX-ANT I Insertion loss in bandwidth without mismatch loss (TX filter) 1.7 2.1 dB L TX-ANT R Input return loss in bandwidth (RX balun) 10 14 dB L RX-ANT R Input return loss in bandwidth (TX filter) 15 20 dB L TX-ANT Output phase imbalance (RX balun) - absolute value 5 9 13 imb A Output amplitude imbalance (RX balun) - absolute value 1.4 1.6 1.8 dB imb Attenuation at 2fo 40 45 Attenuation at 3fo 47 51 Attenuation at 4fo 60 65 Att Harmonic levels (TX filter) dB Attenuation at 5fo 66 72 Attenuation at 6fo 50 57 Attenuation at 7fo 46 50 DS12249 - Rev 2 page 2/13