1FEATURES

2? 125MSPS UPDATE RATE

? SINGLE SUPPLY: +3.3V or +5V

? HIGH SFDR: 78dB at f OUT = 10MHz

? LOW GLITCH: 2pV-s

? LOW POWER: 310mW

? INTERNAL REFERENCE

? POWER-DOWN MODE: 23mW

APPLICATIONS

? COMMUNICATIONS:

– Base Stations, WLL, WLAN

– Baseband I/Q Modulation

? MEDICAL/TEST INSTRUMENTATION

? ARBITRARY WAVEFORM GENERATORS

(ARB)

? DIRECT DIGITAL SYNTHESIS (DDS)

DESCRIPTION

The DAC2904 is a monolithic, 14-bit, dual-channel,

high-speed Digital-to-Analog Converter (DAC), and is

optimized to provide high dynamic performance while

dissipating only 310mW.

Operating with high update rates of up to 125MSPS,

the DAC2904 offers exceptional dynamic

performance, and enables the generation of very-high

output frequencies suitable for “Direct IF”

applications. The DAC2904 has been optimized for

communications applications in which separate I and

Q data are processed while maintaining tight-gain

and offset matching.

Each DAC has a high-impedance differential-current

output, suitable for single-ended or differential

analog-output configurations.

space

The DAC2904 combines high dynamic performance

with a high update rate to create a cost-effective

solution for a wide variety of waveform-synthesis

applications:

? Pin compatibility between family members

provides 10-bit (DAC2900), 12-bit (DAC2902),

and 14-bit (DAC2904) resolution.

? Pin compatible to the AD9767 dual DAC.

? Gain matching is typically 0.5% of full-scale, and

offset matching is specified at 0.02% max.

? The DAC2904 utilizes an advanced CMOS

process; the segmented architecture minimizes

output-glitch energy, and maximizes the dynamic

performance.

? All digital inputs are +3.3V and +5V logic

compatible. The DAC2904 has an internal

reference circuit, and allows use in a multiplying

configuration.

The DAC2904 is available in a TQFP-48 package,

and is specified over the extended industrial

temperature range of –40°C to +85°C.