AD9779BSVZ

The AD9779BSVZ is a high-performance, 16-bit, dual-channel digital-to-analog converter (DAC) manufactured by Analog Devices. This DAC is designed for applications requiring high dynamic range and low distortion, such as wireless infrastructure, digital high/low IF synthesis, and broadband communications.

Key Features:

1. High Resolution and Sampling Rate:

   • The AD9779BSVZ offers 16-bit resolution and a sampling rate of up to 1 GSPS (giga-samples per second), allowing it to produce multi-carriers up to the Nyquist frequency.

2. Dual-Channel Architecture:

   • The dual-channel design enables simultaneous conversion of two analog signals, increasing efficiency and reducing system complexity.

3. Optimized for Direct RF Conversion:

   • The DAC output is optimized for seamless interfacing with analog quadrature modulators like the AD8349. It features composite digital modulation and gain and offset compensation, making it ideal for direct RF conversion applications.

4. Programmable Full-Scale Output Current:

   • The full-scale output current can be programmed within a range of 10 mA to 30 mA, providing flexibility for different load requirements.

5. Advanced CMOS Process:

   • Manufactured using an advanced 0.18 μm CMOS process, the AD9779BSVZ operates with a power supply of 1.8 V and 3.3 V, consuming a total power of 1.0 W at 1 GSPS and 600 mW at 500 MSPS.

6. Low Noise and Distortion:

   • With ultra-low noise and intermodulation distortion (IMD) characteristics, the AD9779BSVZ enables high-quality synthesis of broadband signals from baseband to high IF.

7. Enhanced Dynamic Performance:

   • Proprietary DAC output switch technology improves dynamic performance, making it suitable for applications with stringent requirements on signal integrity.

8. Flexible Digital Interface:

   • The serial peripheral interface (SPI) allows programming and readback of many internal parameters, providing flexibility for system configuration and optimization.

9. Package and Sealing:

   • It adopts a 100-pin TQFP package with exposed pads, which is conducive to heat dissipation and signal integrity.

Applications:

• Wireless Infrastructure:

  • Supports standards such as WCDMA, CDMA2000, TD-SCDMA, WiMAX, and GSM.

• Digital High/Low IF Synthesis:

  • Utilizes internal digital up-conversion functionality for transmit diversity and broadband communications.

• Broadband Communications:

  • Suitable for LMDS/MMDS and point-to-point systems.

Additional Features:

• 2×, 4×, 8× Interpolators/Coarse Modulators:

  • These features allow placing carriers anywhere within the DAC bandwidth.

• Auxiliary DAC for External VGA and Offset Control:

  • Provides additional flexibility for system tuning and optimization.

• Multi-Chip Synchronization Interface:

  • Enables synchronization of multiple DACs for larger systems or phased array applications.

• High-Performance, Low-Noise PLL Clock Multiplier:

  • Simplifies system clock design and ensures accurate timing for DAC operations.

In summary, the AD9779BSVZ is a versatile and high-performance DAC suitable for a wide range of demanding applications. Its high resolution, sampling rate, and dynamic performance make it an excellent choice for wireless infrastructure, digital IF synthesis, and broadband communications systems.