AD6623

a FEATURES Pin Compatible to the AD6622 18-Bit Parallel Digital IF Output Real or Interleaved Complex 18-Bit Bidirectional Parallel Digital IF Input/Output Allows Cascade of Chips for Additional Channels Clipped or Wrapped Over Range Two’s Complement or Offset Binary Output Four Independent Digital Transmitters in Single Package RAM Coefficient Filter (RCF) Programmable IF and Modulation for Each Channel Programmable Interpolating RAM Coefficient Filter p/4-DQPSK Differential Phase Encoder 3p/8-PSK Linear Encoder 8-PSK Linear Encoder Programmable GMSK Look-Up Table Programmable QPSK Look-Up Table All-Pass Phase Equalizer Programmable Fine Scaler Programmable Power Ramp Unit High Speed CIC Interpolating Filter 4-Channel, 104 MSPS Digital Transmit Signal Processor (TSP) AD6623 Digital Resampling for Noninteger Interpolation Rates NCO Frequency Translation Spurious Performance Better than –100 dBc Separate 3-Wire Serial Data Input for Each Channel Bidirectional Serial Clocks and Frames Microprocessor Control 2.5 V CMOS Core, 3.3 V Outputs, 5 V Inputs JTAG Boundary Scan APPLICATIONS Cellular/PCS Base Stations Micro/Pico Cell Base Stations Wireless Local Loop Base Stations Multicarrier, Multimode Digital Transmit GSM, EDGE, IS136, PHS, IS95, TDS CDMA, UMTS, CDMA2000 Phased Array Beam Forming Antennas Software Defined Radio Tuning Resolution Better than 0.025 Hz Real or Complex Outputs FUNCTIONAL BLOCK DIAGRAM NCO = NUMERICALLY CONTROLLED OSCILLATOR/TUNER SDINA DATA SDFIA SDFOA S...