AD9861

Mixed-Signal Front-End (MxFE™) Baseband Transceiver for Broadband Applications AD9861 FEATURES Receive path includes dual 10-bit analog-to-digital converters with internal or external reference, 50 MSPS and 80 MSPS versions Transmit path includes dual 10-bit, 200 MSPS digital-toanalog converters with 1×, 2×, or 4× interpolation and programmable gain control Internal clock distribution block includes a programmable phase-locked loop and timing generation circuitry, allowing single-reference clock operation 20-pin flexible I/O data interface allows various interleaved or noninterleaved data transfers in half-duplex mode and interleaved data transfers in full-duplex mode Configurable through register programmability or optionally limited programmability through mode pins Independent Rx and Tx power-down control pins 64-lead LFCSP package (9 mm × 9 mm footprint) 3 configurable auxiliary converter pins VIN+A ADC VIN–A VIN+B ADC VIN–B I/O INTERFACE CONFIGURATION BLOCK DATA MUX AND LATCH Rx DATA FUNCTIONAL BLOCK DIAGRAM I/O INTERFACE CONTROL FLEXIBLE I/O BUS [0:19] LOW-PASS INTERPOLATION FILTER IOUT+A DAC IOUT–A IOUT+B DAC IOUT–B DATA LATCH AND DEMUX Tx DATA AUX ADC AUX DAC ADC CLOCK AUX DAC DAC CLOCK AUX ADC PLL CLKIN APPLICATIONS Broadband access Broadband LAN Communications (modems) AD9861 AUX DAC 03606-0-001 Figure 1. GENERAL DESCRIPTION The AD9861 is a member of the MxFE family—a group of integrated converters for the communications market. The AD9861 integrates dual...