Model ADRF6620 from Analog Devices, Inc. is an integrated circuit (IC) that combines an active mixer and a frequency synthesizer for next-generation communications applications from 700 to 2700 MHz. Ideal for cellular-communications base stations, the device consists of a high-linearity, broadband active mixer, an integrated fractional-N phase-locked loop (PLL), a low phase noise multi-core voltage-controlled oscillator (VCO), and a variable-gain intermediate-frequency (IF) amplifier (VGA). It also integrates a 4:1 RF switch, an on-chip tunable RF balun, and a programmable RF attenuator. The integrated synthesizer enables continuous LO coverage from 350 to 2850 MHz. The integrated attenuator offers an attenuation range of 0 to 15 dB with 1-dB step size. The integrated high-linearity VGA provides additional gain range from 0 to 12 dB in 0.5-dB steps for maximum flexibility in driving an analog-to-digital converter (ADC). The ADRF6620 is fabricated using an advanced silicon-germanium BiCMOS process. It is available in a 48 pin, RoHS-compliant, 7 x 7 mm LFCSP package with an exposed paddle for operating temperatures from -40 to +85°C.
Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106; (781) 329-4700, FAX: (781) 461-3113, www.analog.com.