ADRF6850

Data Sheet ADRF6850 100 MHz to 1000 MHz Integrated Broadband Receiver FEATURES ► IQ quadrature demodulator ► Integrated fractional-N PLL and VCO ► Gain control range: 60 dB ► Input frequency range: 100 MHz to 1000 MHz ► Input P1dB: +12 dBm at 0 dB gain ► Input IP3: +22.5 dBm at 0 dB gain ► Noise figure: 11 dB at >39 dB gain, 49 dB at 0 dB gain ► Baseband 1 dB bandwidth: 250 MHz in wideband mode, 50 MHz in narrow-band mode ► SPI/I2C serial interface ► Power supply: +3.3 V/350 mA APPLICATIONS ► Broadband communications ► Cellular communications ► Satellite communications FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION The ADRF6850 is a highly integrated broadband quadrature demodulator, frequency synthesizer, and variable gain amplifier (VGA). The device covers an operating frequency range from 100 MHz to 1000 MHz for use in both narrow-band and wideband communications applications, performing quadrature demodulation from IF directly to baseband frequencies. The ADRF6850 demodulator includes a high modulus fractional-N frequency synthesizer with integrated VCO, providing better than 1 Hz frequency resolution, and a 60 dB gain control range provided by a front-end VGA. Control of all the on-chip registers is through a user-selected SPI interface or I2C interface. The device operates from a single power supply ranging from 3.15 V to 3.45 V. Figure 1. Rev. A DOCUMENT FEEDBACK TECHNICAL SUPPORT Information furnished by Analog Devices is believed to be accurate and reliable "as is...