GENERAL DESCRIPTION
The AD7011 is a complete low power, CMOS, π/4 DQPSK modulator with single +5 V power supply. The part is designed to perform the baseband conversion of I and Q transmit waveforms in accordance with the American Digital Cellular Telephone system (TIA IS-54).

FEATURES
   Single +5 V Supply
      On-Chip π/4 DQPSK Modulator
      Modulator Bypass Analog Mode
      Root-Raised Cosine Tx Filters, a = 0.35
      Two 10-Bit D/A Converters
      4th Order Reconstruction Filters
      Differential Analog Outputs
      On-Chip Ramp Up/Down Power Control
      On-Chip Tx Offset Calibration
      Dual Mode Operation, Analog and Digital
      Very Low Power Dissipation, 30 mW typical
   Power Down Mode < 10 μA
   On-Chip Voltage Reference
   24-Pin SSOP
  
APPLICATIONS
   American Digital Cellular Telephony
   American Analog Cellular Telephony