ADRF6820

Data Sheet 695 MHz to 2700 MHz, Quadrature Demodulator with Integrated Fractional-N PLL and VCO ADRF6820 CS SCLK SDIO ENBL 11990-001 FEATURES I/Q demodulator with integrated fractional-N PLL RF input frequency range: 695 MHz to 2700 MHz Internal LO frequency range: 356.25 MHz to 2850 MHz Input P1dB: 14.5 dBm at 1900 MHz RF Input IP3: 35 dBm at 1900 MHz RF Programmable HD3/IP3 trim Single pole, double throw (SPDT) RF input switch RF digital step attenuation range: 0 dB to 15 dB Integrated RF tunable balun for single-ended 50 Ω input Multicore integrated VCO Demodulated 1 dB bandwidth: 600 MHz Demodulated 3 dB bandwidth: 1400 MHz 4 selectable baseband gain and bandwidth modes Digital programmable LO phase offset and dc nulling Programmable via 3-wire serial port interface (SPI) 40-lead, 6 mm × 6 mm LFCSP APPLICATIONS Cellular W-CDMA/GSM/LTE Digital predistortion (DPD) receivers Microwave point-to-point radios FUNCTIONAL BLOCK DIAGRAM RFIN0 29 RFIN1 22 15 14 13 24 SERIAL PORT INTERFACE 2 3 8 9 23 25 26 28 38 DC/PHASE CORRECTION 4 I+ 5 I– POLYPHASE FILTER QUAD DIVIDER 35 LOIN+ 34 LOIN– PLL 39 REFIN LDO 2.5V LDO VCO 1 19 30 31 36 VPOS_3P3 DC/PHASE CORRECTION 10 27 33 40 DECL1 TO DECL4 Figure 1. 11 21 VPOS_5V 6 Q– 7 Q+ GENERAL DESCRIPTION The ADRF6820 is a highly integrated demodulator and synthesizer ideally suited for next generation communication systems. The feature rich device consists of a high linearity broadband I/Q demodulator, an integrated fractional-N ...