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
| IBIS Models |
Data Sheets
Application Notes
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD9745BCPZ Production | 72 ld LFCSP (10x10mm, 4.70mm exposed pad) | OTH 168 | -40 to 85C | 12.06 | 10.25 | Y |
| AD9745BCPZRL Production | 72 ld LFCSP (10x10mm, 4.70mm exposed pad) | REEL 2000 | -40 to 85C | 0 | 10.25 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| AD9745-DPG2-EBZ | Evaluation Board | 495 | Y |
| AD-DAC-FMC-ADP | FMC to High-Speed DAC Evalution Board Adaptor | 125 | Y |
Reference Materials
