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Quick question: AD7961 in the self clocked mode

Samuel Smit
Prodigy 20 points
Other Parts Discussed in Thread: ADS8422

Hello,

I have a few quick questions about the AD7961 in the self clocked mode, could you please answer these questions below:

1)  If you are using AD7961 in the self clocked mode can you adjust the clock frequency?

2) In my application I would prefer to use the self clock mode but the typical clock period is 4 ns, does the ADC always run at this clock speed ? 

3) The max frequency however is around 8ns if you do the calculation in Table 3 note1 which would be perfect. Does the ADC adjust the clock frequency based on the time between conversions?

Thanks in advance,

Samuel

  • 0
    TI__Expert 3785 points

    Hi Samuel,

    I believe the part which you referred to is not a TI part.

    Are you looking for 5MSPS throughput?

    TI has ADS9120 which is a 16-bit, 2.5-MSPS with multiSPI interface. This interface makes it easier to read data from the device and also eases up analog front-end design.

    Regards,
    Rahul

  • 0 in reply to RahulVK
    Prodigy 20 points

    Hi Rahul,

    Yes you are correct it is not a TI part. Wooops :)

    I am looking for a 5 to 10 MSPS part 16 bit low noise ADC, with a // data interface. Any ideas ?

    Best regards,
    Samuel

  • 0 in reply to Samuel Smit
    TI__Expert 3785 points
    Hi Samuel,

    You could consider ADS8422, it is a 16-bit 4MSPS SAR-ADC with parallel interface.

    This ADC includes
    1) Internal voltage reference
    2) Internal reference buffer
    3) Internal common mode output (VREF/2) for use in the signal chain.

    I hope this helps.

    Regards,
    Rahul