PRODUCT DESCRIPTION
The AD6622 comprises four identical digital Transmit Signal Processors (TSPs) complete with synchronization circuitry and cascadable wideband channel summation. An external digitalto-analog converter (DAC) is all that is required to complete a wide band digital up-converter. On-chip tuners allow the relative phase and frequency for each RF carrier to be independently controlled.

FEATURES
   Wideband Digital IF Parallel Output
   Wideband Digital IF Parallel Input
      Allows Cascade of Chips for Additional Channels
   Programmable IF and Modulation for Each Channel
   Programmable Interpolating RAM Coefficient Filter
   High-Speed CIC Interpolating Filter
   NCO Frequency Translation
      Worst Spur Better than 100 dBc
      Tuning Resolution Better than 0.02 Hz
      Real or Complex Outputs
   Digital Summation of Channels
      Clipped or Wrapped Overrange
      Two’s Complement or Offset Binary Output
   Separate 3-Wire Serial Data Input for Each Channel
   Microprocessor Control
   JTAG Boundary Scan

APPLICATIONS
   Cellular/PCS Base Stations
   Micro/Pico Cell Base Stations
   WBCDMA
   Wireless Local Loop Base Stations
   Phase Array Beam Forming Antennas