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ADC08D1520RB - RF application

Evripidis Karseras
Intellectual 735 points
Other Parts Discussed in Thread: ADC12D1000, ADC12D1800, ADC12D1000RF, ADC12D500RF, ADC12D800RF, ADC12D1800RF, ADC12D1600, ADC12D1600RF, ADC08D1520

Dear TI,

I am planning to use the ADC08D1520RB evaluation module for an RF application.

I have done some looking around to find the differences between the RF and non-RF line of ADC's. There where even some threads on this forum about the exact differences. I found good answers and a small presentation which underscores the differences.

From what I gather, apart from the differences in performance mentioned on the TI  website, there shouldn't be any other technical reason that prohibits using the RB for an RF application right ? I have checked the reference design schematics and could not find anything unusual for such application. Maybe you can help me out.

Thanks in advance.

  • 0
    TI__Mastermind 44600 points

    Hi

    As you have probably found, the RF suffix is used on one group of 12 bit GSPS ADC devices, specifically the ADC12D500RF, ADC12D800RF, ADC12D1000RF, ADC12D1600RF and ADC12D1800RF to distringuish them from the earlier released non-RF suffix 12 bit products (ADC12D1000, ADC12D1600, ADC12D1800).

    The key difference between the RF and non-RF 12 bit products are improvements to the front end circuitry to improve noise floor and linearity in the RF family. This results in slightly better SNR and better SFDR particularly with high frequency input signals. You are probably referring to this previous post:  http://e2e.ti.com/support/data_converters/high_speed_data_converters/f/68/p/233756/821637.aspx

    The ADC08D1520 ADC will provide very good performance with high frequency inputs as well. Typical performance versus Fin can be found in the Typical Performance Plots in the ADC08D1520 product datasheet. The key to implementing an RF sampling system with this device will be choosing signal path components that do not degrade the RF signal quality prior to capture at the ADC inputs. The recommended Balun components listed in the ADC12D1800RF product datasheet would also be good fits in an 8 or 10 bit application.

    I hope this is helpful.

    Best regards,

    JIm B

  • 0 in reply to Jim Brinkhurst1
    Intellectual 735 points

    Hello Jim,

    thank you very much for your detailed answer. Much appreciated.

    Kind Regards,

    Evros