16-Bit, 1600 MSPS, TDAC+ Digital-to-Analog Converter

The AD9139 is a 16-bit, high dynamic range digital-to-analog converter (DAC) that provides a maximum update rate of 1600 MSPS, permitting multicarrier generation up to the Nyquist frequency. The AD9139 TxDAC+® includes features optimized for wide band communications applications, including 1× and 2× interpolation, a DLL based high speed interface, sample error detection, and parity detection. A 3-wire serial port interface provides for the programming/readback of many internal parameters. Full-scale output current can be programmed over a range of 9 mA up to 33 mA. The AD9139 is available in a 72-lead LFCSP.

Product Highlights

* 575 MHz achievable input signal bandwidth.

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

* Very small inherent latency variation simplifies both software and hardware design in the system. It allows easy multichip synchronization for most applications.

* Low power architecture improves power efficiency.

Applications

* Wireless communications: 3G/4G and MC-GSM base stations, wideband repeaters, software defined radios

* Wideband communications: point-to-point, LMDS/MMDS

* Transmit diversity/MIMO

* Instrumentation

* Automated test equipment

* Selectable 1×, 2× interpolation filter

* Support input signal bandwidth up to 575 MHz

* Very small inherent latency variation: <2 DAC clock cycles

* Proprietary low spurious and distortion design

* 6-carrier GSM ACLR = 79 dBc at 200 MHz IF

* SFDR >85 dBc (bandwidth = 300 MHz) at zero IF

* Flexible 16-bit LVDS interface

* Supports word and byte load