65MSPS Digital Receive Signal Processor

Analog Devices' innovative Diversity Receiver chipset delivers two IF-to-baseband diversity channels in a compact, comprehensive solution that incorporates Automatic Gain Control, Received Signal Strength Indicator, high-resolution. Numerically Controlled Oscillator and digital filtering on-chip.

The chipset comprises Analog Devices' AD6600 dual-channel IF sampling analog-to-digital converter and AD6620 dual-channel decimating receiver chip. Configured with the appropriate external components, it can address a variety of air interface standards, including GSM, CDMA, IS136 and PHS, as well as proprietary modulation schemes for paging systems and wireless fixed access receivers.

Based on Analog Devices' next-generation receiver architecture, the Diversity Receiver replaces sensitive analog filters with digital filters for significant cost and size reductions. Complete reference designs show the optimal layout for reducing noise and minimizing cross-channel coupling.

* High Input Sample Rate

67 MSPS Single Channel Real

33.5 MSPS Diversity Channel Real

33.5 MSPS Single Channel Complex

* NCO Frequency Translation

Worst Spur Better than –100 dBc

Tuning Resolution Better than 0.02 Hz

* 2nd Order Cascaded Integrator Comb FIR Filter

Linear Phase, Fixed Coefficients

Programmable Decimation Rates: 2, 3 . . . 16