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ADS131M08: ADS131M08:

Prajwal Bhuse
Prodigy 90 points
Part Number: ADS131M08
Other Parts Discussed in Thread: ADS124S08, ADS127L18, ADS1258
Dear Friend,

We are going to develop an IO module series with analog Inputs/Outputs and digital Inputs/Outputs.We have development previous all products using STM32F407VET6,100pins controller and for IO modules series we will be using ST controller only but rest components are yet to be finalized which we are thinking to use of TI depending upon their support.
1.Analog Input/Output: Current(4-20mA) to Voltage(0-5V)-ADC.......We are not going to use readily available modules as its bulk. Exact range of current                                                                                                                      and voltages.Analog Input type differential upto 8 channels.
2.Digital Input/Output:Voltage (0-5V) to Current (4-20mA)-DAC.........Exact range of current and voltages
 
3.Signal conditioning section.
4.RTD/Thermocouple will be discussed later.
So for above requirement we have selected ADS131M08.Could you let us know the compatitiblitiy of this ADC for our application or suggest us suitable ADC
Thank you.
design@avyannatech.com
  • 0
    TI__Intellectual 790 points

    Hello Prajwal Bhuse,

    Based on your requirements the ADS131M08 is a device to consider, however we do have devices that may work better for your application. Have you taken a look at the ADS124S08? This device is great for the 4-20 mA loops and has multiple integrated features that help with the measuring of RTD/Thermocouples. 

    The main question would be: Do you need the simultaneous sampling that the ADS131M08 offers? If not then I would consider the ADS124S08.

    Let me know if you have any questions over the ADS124S08

    Regards,
    Josh

  • 0 in reply to Josh Brown
    Prodigy 90 points

    Hello Josh Brown,

    Thank you for suggesting part number. Rest specs are complied with the requirement but it doesn't comply with our requirement as 8 differential analog input channels.
    Kindly suggest some more part numbers which are aligned with our requirement and let me know for any further queries.

    Hoping to hear from you soon.

    Thanks and Regards,

    Prajwal

  • 0 in reply to Prajwal Bhuse
    TI__Intellectual 790 points

    Hello Prajwal Bhuse,

    Given the requirement of 8 differential channels the ADS131M08 is probably the best option. There is the ADS127L18 and the ADS1258. The ADS127L18 is simultaneous sampling like the M08, but it is more expensive and higher performance part. The ADS1258 does have the 8-channel differential, but it is a multiplexed input part. If you need the simultaneous sampling, then the ADS131M08 is probably the best option here.

    Let me know if you have any other questions.

    Regards,
    Josh

  • 0 in reply to Josh Brown
    Prodigy 90 points

    Hello Josh Brown,

    Thanks for your suggestion. we are ready to go with ADS131M08 but we have certain requirement of ADC for signal conditioning i.e V - I and I - V converter. could you suggest some parts which we can consider for signal conditioning for ADC ?

    our voltage and current requirement is 4 - 20mA for current and 0 - 5v for voltage.

    Kindly check this and let me know.

    Thanks and Regards,

    Prajwal Bhuse

    design@avyannatech.com 

  • 0 in reply to Prajwal Bhuse
    TI__Mastermind 39665 points

    Hi Prajwal,

    You may need amplifier for your signal conditioning, the support team for amplifiers belongs to different teams in TI. You can post your new query on Amplifier forum here.

    BR,

    Dale

  • 0 in reply to Dale Li
    Prodigy 90 points

    Hello Dale,

    Thanks for your reply. I will post the queries regarding signal conditioning on the Amplifier forum. still, if i have any doubt regarding this, I'll get back to you.

    Thanks for your support.

    Thanks and Regards,

    Prajwal Bhuse

    design@avyannatech.com