AD9745 Dual 12-Bit 250 MSPS Digital-to-Analog Converters

A proprietary, dynamic output architecture permits synthesis of analog outputs even above Nyquist by shifting energy away from the fundamental and into the image frequency. A serial peripheral interface (SPI) port provides full programmability. In addition, some pin-programmable features are offered for those applications without a controller. Product Highlights Low noise and intermodulation distortion (IMD) enables high quality synthesis of wideband signals. Proprietary switching output for enhanced dynamic performance. Programmable current outputs and dual auxiliary DACs provide flexibility and system enhancements. Applications Wireless infrastructure: W-CDMA, CDMA2000, TD-SCDMA, WiMAX Wideband communications: LMDS/MMDS, point-to-point Instrumentation: Radio Frequency (RF) signal generators, arbitrary waveform generators

The AD9743/AD9745/AD976/AD9747 are pin-compatible, high dynamic range, dual digital-to-analog converters (DACs) with 10-/12-/14-/16-bit resolutions and sample rates of up to 250 MSPS. The devices include specific features for direct conversion transmit applications, including gain and offset compensation, and they interface seamlessly with analog quadrature modulators, such as the ADL5370.

A proprietary, dynamic output architecture permits synthesis of analog outputs even above Nyquist by shifting energy away from the fundamental and into the image frequency.

A serial peripheral interface (SPI) port provides full programmability. In addition, some pin-programmable features are offered for those applications without a controller.

Product Highlights
  • Low noise and intermodulation distortion (IMD) enables high quality synthesis of wideband signals.
  • Proprietary switching output for enhanced dynamic performance.
  • Programmable current outputs and dual auxiliary DACs provide flexibility and system enhancements.
Applications
  • Wireless infrastructure: W-CDMA, CDMA2000, TD-SCDMA, WiMAX
  • Wideband communications: LMDS/MMDS, point-to-point
  • Instrumentation: Radio Frequency (RF) signal generators, arbitrary waveform generators
Features and Benefits
  • High dynamic range, dual DACs
  • Low noise and intermodulation distortion
  • Single carrier W-CDMA ACLR = 80 dBc at 61.55 MHz
  • Innovative switching output stage permits useable outputs beyond Nyquist frequency
  • LVCMOS inputs with dual-port or optional interleaved single-port operation
  • Differential analog current outputs are programmable from 8.6 mA to 31.7 mA full-scale
  • Auxiliary 10-bit current DACs with source/sink capability for external offset nulling
  • Internal 1.2 V precision reference voltage source
  • Operates from 1.8 V and 3.3 V supplies
  • 315 mW power dissipation
  • Small footprint, RoHS-compliant, 72-lead LFCSP
Digital to Analog Converters
IBIS Models
Data Sheets
Documentnote
AD9743/AD9745/AD9746/AD9747: Dual, 10-/12-/14-/16-Bit 250 MSPS, Digital-to-Analog Converters Data Sheet (Rev. B)PDF 586.62 K
Application Notes
Documentnote
AN-912: Driving a Center-Tapped Transformer with a Balanced Current-Output DAC (Rev. 0)PDF 246 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD9745BCPZ Production72 ld LFCSP (10x10mm, 4.70mm exposed pad)OTH 168-40 to 85C12.0610.25Y
AD9745BCPZRL Production72 ld LFCSP (10x10mm, 4.70mm exposed pad)REEL 2000-40 to 85C010.25Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
AD9745-DPG2-EBZEvaluation Board495Y
AD-DAC-FMC-ADPFMC to High-Speed DAC Evalution Board Adaptor125Y
Reference Materials
AD9743/AD9745/AD9746/AD9747: Dual, 10-/12-/14-/16-Bit 250 MSPS, Digital-to-Analog Converters Data Sheet (Rev. B) ad9743
AD9745 IBIS Model ad9745
AN-912: 用平衡电流输出DAC驱动中心抽头变压器[中文版] (Rev. 0) ad7524
AN-912: Driving a Center-Tapped Transformer with a Balanced Current-Output DAC (Rev. 0) ad7524
Digital to Analog Converters ICs Solutions Bulletin ad5590