AD9765ASTZ

The AD9763/AD9765/AD9767 are optimized for I-data and Q-data processing in communications applications. The digital interface contains two double buffer latches and control logic. Independent write inputs allow data to be written to two DAC ports independently of each other. Independent clocks control the update rate of each DAC.

With the mode control pins, the AD9763/AD9765/AD9767 can interface with two separate data ports or with a single staggered high-speed data port. In interleaved mode, the input data stream is demultiplexed into raw I data and Q data, and then locked. The I data and Q data are then converted by the two DACs and updated at half the input data rate.

The GAINCTRL pin allows the full-scale current (IOUTFS) of both DACs to be set in two modes. You can set the IOUTFS of each DAC independently with two external resistors, or you can set the IOUTFS of two DACs with one external resistor. For important date code information about this feature, see the Gain Control Mode section.

These DACs feature a segmented current source architecture combined with proprietary switching technology to reduce surge energy and maximize dynamic accuracy. Each DAC provides a differential current output, thus supporting single-ended or differential applications. The AD9763, AD9765, or AD9767 DACs can be updated simultaneously and can provide 20 mA of nominal full-scale current. The full-scale current matching accuracy between DACs can reach less than 0.1%.

The AD9763/AD9765/AD9767 are manufactured using an advanced, low-cost CMOS process and operate from a single 3.3 V to 5 V supply with a power consumption of 380 mW.

Product Focus

1. AD9763/AD9765/AD9767均为引脚兼容的双通道、8/10/12/14位分辨率TxDAC系列产品。
2. 双通道、10/12/14位、125 MSPS DAC。每款器件均有一对高性能DAC，并针对低失真性能进行了优化，可灵活传输I与Q信息。
3. 匹配。增益匹配典型值为满量程的0.1%，失调误差优于0.02%。
4. 低功耗。完整的CMOS双DAC功能，采用3.3 V至5 V单电源供电，功耗为380 mW。可以降低DAC满量程电流，从而以更低功耗工作，而且在低功耗空闲期间可以进入睡眠模式。
5. 片内基准电压源。AD9763/AD9765/AD9767均内置1.20 V温度补偿带隙基准电压源。
6. 双路10/12/14位输入。 AD9763/AD9765/AD9767均具有一个灵活的双端口接口，允许以双路方式或交错方式输入数据。

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