100 MHz to 1000 MHz Integrated Broadband Receiver - Analog Devices
Description
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.
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