A new integrated demodulator for broadband applications, such as cellular base stations, satellite communications, point-to-point radios and defence systems has been introduced by Analog Devices. The ADRF6850 demodulator expands the company's RF/microwave product portfolio and offers high level of integration and functionality by combining five devices and three RF functions into one small-footprint, surface-mount chip.
The single-chip demodulator saves considerable board space, reduces cost, and simplifies development by integrating a 60dB VGA (variable gain amplifier), a fractional-N PLL (phase locked loop) synthesiser with VCO (voltage controlled oscillator) and two baseband ADC drivers all in an 8x8mm LFCSP package.
The ADRF6850 operates over a broad frequency range from 100 to 1000MHz and supports narrow band and wideband signal modes up to 250MHz. The device offers enhanced RF performance with an input IP3 (third order intercept) of 22.5dBm, P1dB (input compression point) of 12dB and a noise figure of 11dB. The demodulator also supports the user selected SPI/I2C serial interface and is fully supported by the latest version of the company's PLL design tool, ADIsimPLL.
