1 Features

1• Very Low Power: 1.27 W at 1.25 GSPS, Full

Operating Conditions

• Multi-DAC Synchronization

• Selectable 2x, 4x, 8x, 16x Interpolation Filter

– Stop-Band Attenuation > 90 dBc

• Flexible On-chip Complex Mixing

– Two Independent Fine Mixers with 32-Bit

NCOs

– Power Saving Coarse Mixers: ± 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 16-Bit LVDS Input Data Bus

– 8 Sample Input FIFO

– Data Pattern Checker

– Parity Check

– GC5330 Compatible

• Temperature Sensor

• Differential Scalable Output: 10 mA to 30 mA

• Multiple Package Options: 88-Pin 9x9mm WQFN

and 196-Ball 12mmx12mm NFBGA (GREEN / Pb-

Free)

2 Applications

• Cellular Base Stations

• Diversity Transmit

• Wideband Communications

3 Description

The DAC3484 is a very low power, high dynamic

range, quad-channel, 16-bit digital-to-analog

converter (DAC) with a sample rate as high as 1.25

GSPS.

The device includes features that simplify the design

of complex transmit architectures: 2x to 16x digital

interpolation filters with over 90dB of stop-band

attenuation simplify the data interface and

reconstruction filters. Independent complex mixers allow 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 16-bit LVDS data bus with on-chip termination. 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 very-small 88-pin 9x9mm WQFN

package or 196-ball 12x12mm NFBGA package.

Very low power, small size, superior crosstalk, high

dynamic range and features of the DAC3484 are an

ideal fit for systems with multiple transmit channels.