analog to digital converter

Hi,

We need a single channel a2d in the range of +-10V with resolution of 20microVolts

i looked at the AD7732 and its evaluation kit. will this product do the job?

if so, i going to connect it to a linux PC where can I find the command set for the RS232 serial port?

Regards,

Oded Godsi

  • 0
    •  Analog Employees 
    on Feb 23, 2015 5:43 PM

    Hi Oded Godsi,

         The AD7732 will be a good choice base from the specification that you describe. I have also filters other parts that may help with your application. By the way, what is the specific application you intend to use the part? If you want to search more ADCs that is fit to your application, you may visit the ADI website and do a parametric search and filter the search base from your own specification. Please refer to the link. Selection Table for All A/D Converters

                                                                     

    Part # Resolution Throughput Rate Number of
      Channels
    Circuit
      Architecture
    INL in LSBs
      (max)
    Analog Input
      Type
    DNL (max) Vin Range (max)
    AD7734 24 15.4 kSPS 4 Sigma-Delta SE-Bip, SE-Uni 20 V p-p
    AD7732 24 15.4 kSPS 2 Sigma-Delta Diff-Bip, Diff-Uni 20 V p-p
    AD7713 24 205 SPS 3 Sigma-Delta 754.97 Diff-Bip, Diff-Uni,
      SE-Uni
    0.0596 20 V p-p
    AD7712 24 1.028 kSPS 2 Sigma-Delta 754.97 Diff-Bip, Diff-Uni,
      SE-Bip
    0.0596 21 V p-p

    Regards,

    Jonathan

  • thanks for your answer,

    i have one more question:

    i would like to also purchase the evaluation board for it,

    but i need to sure that my Linux PC would be able to "talk" with this board through the RS232 serial port.

    is there a list of the commands set ?

    Regards,

    Oded

  • 0
    •  Analog Employees 
    on Feb 25, 2015 10:50 PM


    Hi Oded,


         We have not try running the evaluation board on Linux OS, so we are not really sure if it will work. But there is a generic AD7734 generic driver if you wanted to develop your own software. Kindly refer to the link AD7734 - Microcontroller No-OS Driver [Analog Devices Wiki] .

    Regards,

    Jonathan

  • Hi,

    Again thanks for your answers it was really helpful.

    So a managed to connect the evaluation board to my Linux PC and it works most of the time...

    because there are some communication problems.

    I think it is because the board is located about 10 meters from the PC.

    Is there a possibility to change the Baud Rate of the evaluation board from 38400 to 9600?

    Or is there another way to get over this problems

    Regards

    Oded

  • Hi,

    Again thanks for your answers it was really helpful.

    So a managed to connect the evaluation board to my Linux PC and it works most of the time...

    because there are some communication problems.

    I think it is because the board is located about 10 meters from the PC.

    Is there a possibility to change the Baud Rate of the evaluation board from 38400 to 9600?

    Or is there another way to get over this problems

    Regards

    Oded