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