AD9772AAST

Digital To Analog Converters Overview

The AD9772AAST is a single-supply, oversampling, 14-bit digital-to-analog converter (DAC) optimized for baseband or IF waveform reconstruction. It integrates a complete low-distortion DAC with a 2× digital interpolation filter and an on-chip PLL clock multiplier. The device supports input data rates up to 160 MSPS and provides a flexible differential clock input for optimum jitter performance. Key specifications include a nominal power dissipation of 253 mW to 272 mW, a full-scale output current of 20 mA, and operation over the industrial temperature range of –40°C to +85°C in a 48-lead LQFP package.

Digital To Analog Converters Feature Summary

• 14-bit resolution with 160 MSPS maximum input data rate
• Integrated 2× FIR interpolation filter with selectable low-pass or high-pass response
• On-chip PLL clock multiplier generating internal clocks for the filter and DAC
• Zero-stuffing option for enhanced direct IF application performance

Digital To Analog Converters Applications

• Communication transmit channels
• W-CDMA base stations
• Multicarrier base stations
• Direct IF synthesis
• Wideband cable systems

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'A' against the manufacturer's ordering guide to confirm pinout compatibility and electrical characteristics relative to other variants in the AD9772A family. Ensure that the 48-lead LQFP package dimensions match the target PCB footprint. Confirm supply voltage requirements align with the specified 3.1 V to 3.5 V range for AVDD, DVDD, and CLKVDD pins.

Digital To Analog Converters Selection Notes

Select this component when high dynamic range is required for baseband or IF reconstruction. The integrated 2× interpolation filter reduces analog reconstruction filter complexity by suppressing upper in-band images by more than 73 dB. Consider the zero-stuffing feature if direct IF applications require increased signal level and pass-band flatness for higher IF images.

Digital To Analog Converters Part Context

The AD9772A belongs to Analog Devices' TxDAC+ family of high-speed digital-to-analog converters. This series is designed for communication transmit paths, offering CMOS-based low power consumption and cost-effectiveness compared to bipolar alternatives. The AD9772A specifically targets applications requiring exceptional spurious-free dynamic range and flexibility in clocking configurations.

Digital To Analog Converters Replacement Considerations

Check the manufacturer's ordering guide for pin-compatible alternatives within the AD9772A series. Verify if updated revisions or suffixes offer improved thermal characteristics or extended temperature ranges suitable for the specific deployment environment.