ADRF6601

Data Sheet 300 MHz to 2500 MHz Rx Mixer with Integrated Fractional-N PLL and VCO ADRF6601 FEATURES Rx mixer with integrated fractional-N PLL RF input frequency range: 300 MHz to 2500 MHz Internal LO frequency range: 750 MHz to 1160 MHz Input P1dB: 14.5 dBm Input IP3: 31 dBm IIP3 optimization via external pin SSB noise figure IP3SET pin open: 13.5 dB IP3SET pin at 3.3 V: 14.6 dB Voltage conversion gain: 6.7 dB Matched 200 Ω IF output impedance IF 3 dB bandwidth: 500 MHz Programmable via 3-wire SPI interface 40-lead, 6 mm × 6 mm LFCSP APPLICATIONS Cellular base stations GENERAL DESCRIPTION The ADRF6601 is a high dynamic range active mixer with an integrated phase-locked loop (PLL) and a voltage controlled oscillator (VCO). The PLL/synthesizer uses a fractional-N PLL to generate a fLO input to the mixer. The reference input can be divided or multiplied and then applied to the PLL phase frequency detector (PFD). The PLL can support input reference frequencies from 12 MHz to 160 MHz. The PFD output controls a charge pump whose output drives an off-chip loop filter. The loop filter output is then applied to an integrated VCO. The VCO output at 2 × fLO is applied to an LO divider, as well as to a programmable PLL divider. The programmable PLL divider is controlled by a sigma-delta (Σ-Δ) modulator (SDM). The modulus of the SDM can be programmed from 1 to 2047. The active mixer converts the single-ended 50 Ω RF input to a 200 Ω differential IF output. The IF output can operate up...