AD9747: Dual 16-Bit 250 MSPS Digital-to-Analog Converters
The AD9741/AD9743/AD9745/AD9746/AD9747 are pin-compatible, high dynamic range, dual digital-to-analog converters (DACs) with 8-/10-/12-/ 14-/16-bit resolutions and sample rates of up to 250 MSPS. ...More
AD9747: Dual 16-Bit 250 MSPS Digital-to-Analog Converters
Product Description
The AD9741/AD9743/AD9745/AD9746/AD9747 are pin-compatible, high dynamic range, dual digital-to-analog converters (DACs) with 8-/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.
Full programmability is provided through a serial peripheral interface (SPI) port. 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:
WCDMA, CDMA2000, TD-SCDMA, WiMAX - Wideband communications:
LMDS/MMDS, point-to-point - Instrumentation:
RF signal generators, arbitrary waveform generators
- Data Sheet Rev 0, 05/2007 (pdf 648kB)
- (About Data Sheets)
Design Tools
DAC Harmonic Analyzer
This tool displays harmonic images and spurs in a DAC output. The user can ...
AD9747 IBIS Model
Features
- High dynamic range, dual DACs
- Low noise and intermodulation distortion
- Single carrier WCDMA ACLR = 80 dBc @ 61.44 MHz IF
- 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, Pb-free, 72-Lead LFCSP
Diagrams
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- Symbols and Footprints
Functional Block Diagram for AD9747
Dual 16-Bit 250 MSPS Digital-to-Analog Converters
Other Diagrams for AD9747
Dual 16-Bit 250 MSPS Digital-to-Analog Converters
AD9747 Pin Configuration
Functional Block Diagram for AD9747
