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