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ADC with +/-5V analog input rage with parallel interface

Prodigy 40 points

Replies: 6

Views: 355

Hi,

i am looking for an ADC with analog input range -5V to +5V, resolution requirement is around 12 bit and Sampling rate of 1.25 Msps. If any device with better than this specification is also good. Please share if you have any suitable device.

Thanks and Regards

Adarsh K Hegde

  • Hi Adarsh,

    Welcome to our e2e forum! How many input channels do you need? Is the parallel interface a 'must have'?

     

    Regards,

    Tom

  • In reply to Tom Hendrick:

    Hi Tom,

    Thank you,

    We need a single channel ADC and yeah parallel interface is must needed. If any parts which is having more than 1 and less than 5 channels we can think about that. I found a part ADS8661IPWR with serial interface, but we kept it as a second option, also can we get information on lifecycle status of ADS8661IPWR, how long TI going to support this part.

    Thanks and Regards
    Adarsh K Hegde
  • In reply to Adarsh Hegde:

    Hi Adarsh,

    The ADS8661 is a nice part! I'm having trouble finding bi-polar parallel parts with the speed you need, if you can go down ~800ksps, the ADS8558 might work out for you. Can you work with attenuation ahead of the ADC? If so, perhaps you can use the INA159 to reduce your +/-5V input which opens up more possibilities on the parallel interface side of things.

     

    Regards,

    Tom

  • In reply to Tom Hendrick:

    Hi Tom,

    We have input which can vary from -5V to +5V, let me check in our circuit on what could be the possible changes if we go with attenuation. Meanwhile may i know how long ADS8661 will be in market,i mean to become obsolete.

    Thanks and Regards

    Adarsh K Hegde 

  • In reply to Adarsh Hegde:

    Hi Adarsh,

    Sorry for the delay here - the general rule at TI is that we don't obsolete parts. If it does get to a point where we need to EOL a device, we'll give you notice well in advance.

     

    Regards,

    Tom

  • In reply to Tom Hendrick:

    Thank you Tom, we are working on your recommendation. will come back if we have any further queries.

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