AD6649

www.DataSheet4U.net IF Diversity Receiver AD6649 FEATURES SNR = 73.0 dBFS in a 95 MHz bandwidth at 185 MHz AIN and 245.76 MSPS SFDR = 85 dBc at 185 MHz AIN and 250 MSPS Noise density = −151.2 dBFS/Hz input at 185 MHz, −1 dBFS AIN and 250 MSPS Total power consumption: 1 W with fixed-frequency NCO, 95 MHz FIR filter 1.8 V supply voltages LVDS (ANSI-644 levels) outputs Integer 1-to-8 input clock divider (625 MHz maximum input) Integrated dual-channel ADC Sample rates of up to 250 MSPS IF sampling frequencies to 400 MHz Internal ADC voltage reference Flexible input range 1.4 V p-p to 2.1 V p-p (1.75 V p-p nominal) ADC clock duty cycle stabilizer 95 dB channel isolation/crosstalk Integrated wideband digital processor 32-bit complex numerically controlled oscillator (NCO) FIR filter with 2 modes Real output from an fS/4 output NCO Amplitude detect bits for efficient AGC implementation Energy saving power-down modes Decimated, interleaved real LVDS data outputs AVDD FDA APPLICATIONS Communications Diversity radio systems Multimode digital receivers (3G) TD-SCDMA, WiMax, WCDMA, CDMA2000, GSM, EDGE, LTE General-purpose software radios Broadband data applications GENERAL DESCRIPTION The AD6649 is a mixed-signal intermediate frequency (IF) receiver consisting of dual 14-bit, 250 MSPS ADCs and a wideband digital downconverter (DDC). The AD6649 is designed to support communications applications, where low cost, small size, wide bandwidth, and versatility are desired. The dual ADC cores...