GENERAL DESCRIPTION
The AD9142A is a dual, 16-bit, high dynamic range digital-to-analog converter (DAC) that provides a sample rate of 1600 MSPS, permitting a multicarrier generation up to the Nyquist frequency. The AD9142A TxDAC+® includes features optimized for direct conversion transmit applications, including complex digital modulation, input signal power detection, and gain, phase, and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators, such as the ADL537x F-MOD series and the ADRF670x series from Analog Devices, Inc. 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 to 33 mA. The AD9142A is available in a 72-lead LFCSP.

FEATURES
   Supports input data rate 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 ZIF
   Flexible 16-bit LVDS interface
      Supports word and byte load
      Data interface DLL
      Sample error detection and parity
   Multiple chip synchronization
      Fixed latency and data generator latency compensation
   Selectable 2×, 4×, 8× interpolation filter
      Low power architecture
      fS/4 power saving coarse mixer
   Input signal power detection
      Emergency stop for downstream analog circuitry
         protection
      FIFO error detection
   On-chip numeric control oscillator allows carrier placement
      anywhere in the DAC Nyquist bandwidth
   Transmit enable function for extra power saving
   High performance, low noise PLL clock multiplier
   Digital gain and phase adjustment for sideband suppression
   Digital inverse sinc filter
   Low power: 1.8 W at 1.6 GSPS, 1.5 W at 1.25 GSPS, full
      operating conditions
   72-lead LFCSP

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