接口iso，像AD74XX这样的ADC

大家好，
我需要接口两个孤立的ADC，如AD7403从模拟设备到PSoC 5LP。
ADC发出1和0的数据流，这个流的平均值代表模拟值。
当然，一个简单的RC滤波器可以用来产生一个移动平均值，它可以由PSoC的ADC来采样，但是我想知道是否有一个更优雅的解决方案。
目前，我正在运行一个单一的AD7403在5兆赫（最低可能的频率）。
ADC的数字输出由状态寄存器获取。
然后，DMA将数据传送到数字滤波器块，在这里，我使用一个SIS4低通滤波器。
这样，我在DMA上创建了5 MHz的单字节传输请求。
到目前为止，它看起来还不错，但我还没有检查数据的完整性。
DMA真的能处理这样的频率吗？
我需要接口两个ADC，可能在更高的频率（每个10兆赫）-你认为我的解决方案是可行的这样的应用程序？
还有别的选择吗？
我在PSoC Creator和AD7403的数据表中附加了一个小例子。
谢谢你
AD7403.PDF
557.1 K
ISOADC.CyWrk.CaseV01.Zip
535.4 K



     以下为原文
  Hi everyone,

I need to interface two isolated ADCs like the AD7403 from Analog Devices to the PSoC 5LP.
The ADC puts out a data stream of 1 and 0 and the average of this stream represents the analog value.
Of course a simple RC filter could be used to generate a moving average which could be samples by PSoC's ADC, but I was wondering if there is a more elegant solution to this.

At the moment I am running a single AD7403 at 5 MHz (the lowest possible frequency).
The digital output of the ADC is acquired by a status register.
A DMA then transfers the data to the digital filter block where I use a SINC4 low pass filter.
This way I am creating single byte transfer requests at 5 MHz on the DMA.
So far it seems to be working fine but I have not checked the integrety of the data.

Can the DMA really handle such a frequency?
I need to interface two of those ADCs and possibly at higher frequencies (10 MHz each) - do you think my solution is viable for such an application?
Is there an alternative?

I attached a small example in PSoC Creator and the datasheet of the AD7403

Thank you

•   AD7403.pdf 557.1 K
•   ISOADC.cywrk.Archive01.zip 535.4 K