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 phase-locked loop (PLL), and a low phase noise multicore, voltage controlled oscillator (VCO). The ADRF6820 also integrates a 2:1 RF switch, an on-chip tunable RF balun, a programmable RF attenuator, and two low dropout (LDO) regulators. This highly integrated device fits within a small 6 mm × 6 mm footprint.

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