ADC3669: Achieve 1GSPS using interleaving

HIDEHARU KONDO

Part Number: ADC3669

Tool/software:

The ADC3669 is a 500MSPS, 16-bit, dual channel ADC.
To achieve 1GSPS, 16-bit, single channel using interleaving, do I need to use two ADC3669s? or one ADC3669?

9 months ago

0 Rob Reeder 9 months ago

TI__Mastermind 41990 points

Hi Kondo,

Why not use a 1GSPS ADC instead? We have plenty of those devices available on TI.com.

Regards,

Rob

0 HIDEHARU KONDO 9 months ago in reply to Rob Reeder

Prodigy 150 points

I think it will be cheaper to design our measuring circuit using two 500MSPS ADCs than one 1GSPS ADC.
Could you please answer my previous question?

0 Rob Reeder 9 months ago in reply to HIDEHARU KONDO

TI__Mastermind 41990 points

Hi Kondo,

Understood. However, it will be difficult to achieve AC performance specs if you are not familiar with what to do by tying the two analog inputs together and accounting for the gain, offset, phase and BW mismatch errors. These show up in the spectrum as spurious.

Has that been considered as well?

Regards,

Rob

0 HIDEHARU KONDO 9 months ago in reply to Rob Reeder

Prodigy 150 points

Hi Rob,

Thank you for your advice. If I can solve these error problems, can I achieve 1GSPS, 16-bit, single channel with just one ADC3669?

I would like to know if this is possible in principle.

0 Rob Reeder 9 months ago in reply to HIDEHARU KONDO

TI__Mastermind 41990 points

Hi Kondo,

Resolving the error spur issues, is a very difficult problem.

I don't recommend it if you are new to this.

It would be much better to purchase an ADC that samples at the 1GSPS or the correct sampling rate.

Regards,

Rob

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ADC3669: Achieve 1GSPS using interleaving