Quad, 16-Bit, 2.8 GSPS, TxDAC+ Digital-to-Analog Converter

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.

Product Highlights

* Greater than 1 GHz, ultrawide complex signal bandwidth enables emerging wideband and multiband wireless applications.

* Advanced low spurious and distortion design techniques provide high quality synthesis of wideband signals from baseband to high intermediate frequencies.

* JESD204B Subclass 1 support simplifies multichip synchronization in software and hardware design.

* Fewer pins for data interface width with a serializer/deserializer (SERDES) JESD204B eight-lane interface.

* Programmable transmit enable function allows easy design balance between power consumption and wake-up time.

* Small package size with 12 mm × 12 mm footprint.

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

* 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