Does the SCLK have to be continuous for the AD7321?

Hi, 

I made some study for AD7321 for a while and I thought this chip could meet our requirement. But when I tried to purchase the evaluation board to perform a further evaluation, the system said that EVAL-AD7321 was not recommended for new designs and…

hi, Sir:

The datasheet says that:

Resolution:

Differential mode: 12-bit plus, sign (13 bits)

Single-ended/pseudo differential mode: 11-bit plus, sign (12 bits)

I always get the 12-bit plus, sign (13 bits) in either mode.

Is it right? thanks.

Is it possible to make driver for AD7321 with IIO framework..?

I found out Industrial Input Output (IIO) framework driver for most of ADCs.

But i cant able to find out IIO driver for AD7321.

Can any one help for me..?

For most of other ADC devices, IIO ( Industrial Input Output) is available.

But i can't able to find out IIO driver for AD7321.

But i got only AD7321 Evaluation Software from http://www.analog.com/en/products/analog-to-digital-converters/ad-converters…

问题1：我公司使用AD7321芯片过程中发现容易出问题，不确定芯片是否已经坏了，因为芯片还是有输出信号，不过输出信号和正常工作时不一样，当输入信号有变化时，输出信号也有变化。怀疑是芯片初始化问题，但是重新初始化还是不能正常工作。同一个程序，更换芯片后就正常工作。

问题2：AD7321 DOUT示波器测量信号时发现，DOUT数字脉冲信号最后一个bit跟电平0位不是垂直的，而是斜线向下到达零位的。

AD7321电路 ：VDD +12V；VSS -12V， VCC和VDRIVE 5V，单端信号接VIN0…

工程师你好：

      你好， 我正在使用贵公司的AD7321芯片， 现在想用ARM9的Linux系统通过SPI读取芯片数据， 想问一下您那有没有开发好的驱动程序和测试应用程序。希望能够尽快回复，谢谢！

for AD7321 when it is single-ended mode, the output is 12bits, 

My concern is when in single-ended mode, which bits are useful in the first figure? sign bit + DB11-DB1 or DB11-DB0?

Looking forward to your answer.

Thank you very much!

我的情况是，只使用IN0测量信号，并连续测量，输出编码格式为直接二进制编码，CONTROL REGISTER为0x8038,RANGE REGISTER为0xA000，下图分别为示波器测得的写入信号和始终，频率为300khz。但是，不知道为什么，我的芯片输出端没有信号