A/D Chip selection help

Hi EricCho,

   Here some ADCs that you may want to consider in your design. I have chosen these ADCs because of their high sampling rate that is suitable to your input  frequency and voltage range. the links refer directly to the datasheet of the product that you can check directly the specification parameters.

AD7626 - 16 bit 10MSPS

AD7625 - 16 bit  6MSPS

AD7961 - 16 bit 5MSPS

AD7960 - 18bit  5MSPS

LTC2323-16 - 16bit 5MSPS

LTC2385-16 - 16bit 5MSPS

Regards,

Jonathan

Hi EricCho,

   According to Nyquist theory, the sampling rate should be at least twice the input frequency. Here are some of the articles that best explains about sampling. MT-002 and AN-282. The ADCs I have mentioned have tested the performance in different conditions in specified input frequency. Like the SNR for example, they were specified to use Fin = 2.4Mhz for AD7626 at 89dBFS.

Regards,

Jonathan

Hello Jonathan:

   Many thanks for your help. But can you tell me how to determine the sample rate if the input frequency(f IN) is known.

Thanks & regards

EricCho

Hi jcolao

   Sorry for bothering you again. I now have an AD9826 in hand, i am not sure weather it can be used. So what's your opinion?