GENERAL DESCRIPTION

The AD9748 is an 8-bit resolution, wideband, third generation member of the TxDAC series of high performance, low power CMOS digital-to-analog converters (DACs). The TxDAC family, consisting of pin compatible 8-, 10-, 12-, and 14-bit DACs, is specifically optimized for the transmit signal path of communication systems. All of the devices share the same interface options, small outline package, and pinout, providing an upward or downward component selection path based on performance, resolution, and cost. The AD9748 offers exceptional ac and

dc performance while supporting update rates up to 165 MSPS.

FEATURES

High Performance Member of Pin Compatible

   TxDAC Product Family

Linearity:

   0.1 LSB DNL

   0.1 LSB INL

Twos Complement or Straight Binary Data Format

Differential Current Outputs: 2 mA to 20 mA

SINAD @ 5 MHz Output: 50 dB

Power Dissipation: 135 mW @ 3.3 V

Power-Down Mode: 15 mW @ 3.3 V

On-Chip 1.20 V Reference

CMOS Compatible Digital Interface

32-Lead LFCSP

Edge-Triggered Latches

Fast Settling: 11 ns to 0.1% Full Scale

APPLICATIONS

Communications

Direct Digital Synthesis (DDS)

Instrumentation