GENERAL DESCRIPTION

The AD9144 is a quad, 16-bit, high dynamic range digital-to-analog converter (DAC) that provides a maximum sample rate of 2.8 GSPS, permitting a multicarrier generation up to the Nyquist frequency. The DAC outputs are optimized to interface seamlessly with the ADRF6720 analog quadrature modulator (AQM) from Analog Devices, Inc. An optional 3-wire or 4-wire serial port interface (SPI) provides for programming/readback of many internal parameters. Full-scale output current can be programmed over a typical range of 13.9 mA to 27.0 mA. The AD9144 is available in an 88-lead LFCSP.

FEATURES

Supports input data rate >1 GSPS

Proprietary low spurious and distortion design

6-carrier GSM IMD = 77 dBc at 75 MHz IF

SFDR = 82 dBc at dc IF, −9 dBFS

Flexible 8-lane JESD204B interface

Support quad or dual DAC mode at 2.8 GSPS

Multiple chip synchronization

Fixed latency

Data generator latency compensation

Selectable 1×, 2×, 4×, 8× interpolation filter

Low power architecture

Input signal power detection

Emergency stop for downstream analog circuitry protection

Transmit enable function allows extra power saving

High performance, low noise phase-locked loop (PLL) clock

multiplier

Digital inverse sinc filter

Low power: 1.6 W at 1.6 GSPS, 1.7 W at 2.0 GSPS,

full operating conditions

88-lead LFCSP with exposed pad

APPLICATIONS

Wireless communications

3G/4G W-CDMA base stations

Wideband repeaters

Software defined radios

Wideband communications

Point-to-point

Local multipoint distribution service (LMDS) and

multichannel multipoint distribution service (MMDS)

Transmit diversity, multiple input/multiple output (MIMO)

Instrumentation

Automated test equipment