The AD9481 datasheet mentions that a 10 uF bulk capacitor is required on the VREF pin when the internal fixed reference is used. It doesn't say what the maximum ESR for this capacitor should be. Is there a recommendation on how high the ESR can be for…

AD9481芯片在使用过程中，数据同步时钟信号输出正常。在数据输出时钟信号正常的情况下，出现了下面的问题：

当检测电压超出转换范围内时，输出全是0或全是1，这种情况下数据输出与期望输出相符，正常无问题。

但是当电压在转换范围内的情况下数据输出引脚出现高阻态，数据输出与期望输出完全不符，不正常。

这款芯片的控制引脚也不多，排查了一编，也没发现什么异常，请问这样的问题是出在哪里了？

Where to get Gerber files for AD9481 CMOS customer board Rev.A PCB from the data sheet http://www.analog.com/media/en/technical-documentation/data-sheets/AD9481.pdf  (pp.26-27) ?

I am designing a laser ranger where the latency of the ADC matters. The ADC is clocked at 250MHz. According to the datasheet, the latency should be 8 clock cycles. Here is the problem: after every the latency changes randomly. Sometimes it is 8 cycles…