AD9764属于TxDAC®系列高性能、低功耗CMOS
Digital-to-analog converters(DAC)的14位分辨率产品。TxDAC®系列由引脚兼容的8、10、12、14位DAC组成，并专门针对通信系统的发射信号路径进行了优化。所有器件都采用相同的接口选项、小型封装和引脚排列，因而可以根据性能、分辨率和成本，向上或向下选择适合的器件。AD9764提供出色的交流和直流性能，同时支持最高125 MSPS的更新速率。
The AD9764 features a flexible single-supply operating voltage range (2.7 V to 5.5 V) and low power consumption, making it ideal for portable and low-power applications. By reducing the full-scale current output, power consumption can be further reduced to just 45 mW with only a slight reduction in performance. In addition, standby power consumption can be reduced to about 25 mW in power-saving mode.
The AD9764 is manufactured using an advanced CMOS process. The segmented current source architecture combined with proprietary switching technology reduces stray components and enhances dynamic performance. The device also integrates an edge-triggered input latch and a 1.2 V temperature-compensated bandgap reference to provide a complete single-chip DAC solution. Flexible power options support +3 V and +5 V CMOS logic families.
The AD9764 is a current output DAC with a nominal full-scale output current of 20 mA and an output impedance greater than 100 kΩ. It provides differential current output to support single-ended or differential applications. Matching between the two current outputs ensures enhanced dynamic performance in differential output configurations. The current output can be connected directly to an output resistor to provide two complementary single-ended voltage outputs or fed directly into the transformer. Compatible output voltages range from 1.25 V.
The on-chip reference and control amplifier are configured for maximum accuracy and flexibility. The AD9764 can be driven by an on-chip reference or by a variety of different external references. The internal control amplifier provides a wide (>10:1) regulation range, allowing the AD9764's full-scale current to be adjusted from 2 mA to 20 mA while maintaining excellent dynamic performance. As a result, the AD9764 is able to operate at low power levels or regulate over the 20 dB range, further providing gain range adjustment capabilities.
AD9764采用28引脚SOIC封装，额定温度范围为工业温度范围。