1 Features

• Very low power: 900mW at 1.25GSPS, full

operating conditions

• Multi-DAC synchronization

• Selectable 2x, 4x, 8x, 16x interpolation filter

– Stop-band attenuation > 90dBc

• Flexible on-chip complex mixing

– Fine mixer with 32-bit NCO

– Power saving coarse mixer: ± n×Fs/8

• High performance, low jitter clock multiplying PLL

• Digital I and Q correction

– Gain, phase, offset, and group delay correction

• Digital inverse sinc filter

• Flexible LVDS input data bus

– Word- or byte-wide interface

– 8 Sample input FIFO

– Data pattern checker

– Parity check

• Temperature sensor

• Differential scalable output: 10mA to 30mA

• Multiple package options: 88 Pin 9 x 9mm WQFNMR

and 196-ball 12mm x12mm

2 Applications

• Cellular base stations

• Diversity transmit

• Wideband communications

3 Description

The DAC3482 is a very low power, high dynamic

range, dual-channel, 16-bit digital-to-analog converter

(DAC) with a sample rate as high as 1.25GSPS.

The device includes features that simplify the

design of complex transmit architectures: 2x to 16x

digital interpolation filters with over 90dB of stopband

attenuation simplify the data interface and

reconstruction filters. A complex mixer allows flexible

carrier placement. A high-performance low jitter clock

multiplier simplifies clocking of the device without

significant impact on the dynamic range. The digital

Quadrature Modulator Correction (QMC) enables

complete IQ compensation for gain, offset, phase, and

group delay between channels in direct up-conversion

applications.

Digital data is input to the device through a flexible

LVDS data bus with on-chip termination. Data can

be input either word-wide or byte-wide. The device

includes a FIFO, data pattern checker and parity test

to ease the input interface. The interface also allows

full synchronization of multiple devices.

The device is characterized for operation over the

entire industrial temperature range of –40°C to 85°C

and is available in a small 88 pin 9 x 9mm WQFN-MR

package or 196-ball 12 x12mm NFBGA package.

Low power, small size, superior crosstalk, high

dynamic range, and features of the DAC3482 make

it an ideal fit for today’s communication systems.