ADC12DJ5200RFEVM: Some questions

ttd

Mastermind 8580 points

Part Number: ADC12DJ5200RFEVM
Other Parts Discussed in Thread: ADC12DJ2700EVM

Tool/software:

Dear Technical Support Team,

Thanks to the support I received in the following post, my evaluation has progressed since then. Thank you.

(+) ADC12DJ5200RFEVM: Error message on HSDC pro - Data converters forum - Data converters - TI E2E support forums

I have a few questions regarding that.

・ENOB measurements were not as good as the datasheet values.
　At 997MHz, -1dBFS: Datasheet: 8.7bits, Measurement: 8.04bits
Do you have advice to improve ENOB?

・Prolonged use caused heat generation, leading to increased noise and offset drift.
　Applying a fan reduced these issues, indicating this requires attention during design.

The default clock source on the evaluation board is set to an external clock.
ADC12DJ2700EVM, the onboard clock was the default.
Is there a specific reason for this change?

Best Regards,

ttd

1 day ago

0 Rob Reeder 12 hours ago

TI__Mastermind 37830 points

Hi Ishii,

How is the measurement collected? Please send over a block diagram with details. The more details the better.

We would need to understand all the details on the test setup of the 5200RF ADC and what spurs are included or excluded in the SINAD measurement in order to derive the ENOB number that you are measuring.

Regards,

Rob