AD6679

Data Sheet 135 MHz BW IF Diversity Receiver AD6679 FEATURES Parallel LVDS (DDR) outputs In-band SFDR = 82 dBFS at 340 MHz (500 MSPS) In-band SNR = 67.8 dBFS at 340 MHz (500 MSPS) 1.1 W total power per channel at 500 MSPS (default settings) Noise density = −153 dBFS/Hz at 500 MSPS 1.25 V, 2.50 V, and 3.3 V dc supply operation Flexible input range 1.46 V p-p to 2.06 V p-p (2.06 V p-p nominal) 95 dB channel isolation/crosstalk Amplitude detect bits for efficient automatic gain control (AGC) implementation Noise shaping requantizer (NSR) option for main receiver function Variable dynamic range (VDR) option for digital predistortion (DPD) function 2 integrated wideband digital processors per channel 12-bit numerically controlled oscillator (NCO), up to 4 cascaded half-band filters Differential clock inputs Integer clock divide by 1, 2, 4, or 8 Energy saving power-down modes Small signal dither APPLICATIONS Diversity multiband, multimode digital receivers 3G/4G, TD-SCDMA, W-CDMA, GSM, LTE, LTE-A DOCSIS 3.0 CMTS upstream receive paths HFC digital reverse path receivers GENERAL DESCRIPTION The AD6679 is a 135 MHz bandwidth mixed-signal intermediate frequency (IF) receiver. It consists of two, 14-bit, 500 MSPS analog-to-digital converters (ADCs) and various digital signal processing blocks consisting of four wideband DDCs, an NSR, and VDR monitoring. It has an on-chip buffer and a sample-andhold circuit designed for low power, small size, and ease of use. This product is designed t...