The ADRF6850 demodulator from Analog Devices targets broadband applications such as cellular basestations, satellite communications, point-to-point radios, and defense systems. According to the company, it offers the highest level of integration and functionality in the industry by combining five devices and three RF functions into one small-footprint, surface-mount chip.

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While discrete implementations use a multi-chip approach, the ADRF6850 is designed to save considerable board space, reduce cost, and simplify development by integrating a 60-dB variable gain amplifier (VGA) and a fractional-N phase-locked loop (PLL) synthesizer with a voltage-controlled oscillator (VCO) and two baseband analog-to-digital converter (ADC) drivers in an 8- by 8-mm, lead-free chip-scale package (LFCSP).

The demodulator operates from 100 to 1000 MHz and supports narrow-band and wideband signal modes up to 250 MHz. It offers best-in-class RF performance with an input third-order intercept (IP3) of 22.5 dBm, an input compression point (P1dB) of 12 dB, and a noise figure of 11 dB, the company says. It also supports the user-selected SPI/I2C serial interface and is fully supported by the latest version of the company’s ADIsimPLL PLL design tool.

In production now, the ADRF costs $7.50 each in 1000-unit lots. It is the companion piece to the company’s ADRF6750 modulator. A complete datasheet and samples are available at www.analog.com/adrf6850.

Analog Devices