ADS54J60 - Reset question

Herb Sims36

Other Parts Discussed in Thread: ADS54J60, ADS54J60EVM

In the data sheet for the ADS54J60 ADC on page 62 (SBAS706B – APRIL 2015 – REVISED AUGUST 2015) it talks about resetting the device. The low→high→low pulsing of pin 48 (RESET pin) is self-explanatory. Just below that is a software reset which i _believe_ you have to do ALL steps in order to get the same response as the reset line - correct???

So to fully configure the ADC you then must complete Steps 3-7. Regardless of how you reset, correct?

Thanks,

Herb

over 9 years ago

0 jim s over 9 years ago

TI__Guru* 91947 points

Herb,

Yes, you can either do a hard reset or write all of the registers listed in the soft reset section on page 62.

Regards,

Jim

0 Herb Sims36 over 9 years ago in reply to jim s

Prodigy 30 points

Jim,

OK, another question concerning the JESD204B lanes for this device. Is it acceptable practice to have vias on the JESD204B lanes? I would assume that if one lane has a via, at least the differential to that trace must also have a via? Or if one trace/lane has a via, then ALL lanes must have vias?

0 jim s over 9 years ago in reply to Herb Sims36

TI__Guru* 91947 points

Herb,

We normally try to route the pairs of each high speed lane as identical as possible. Try to keep the lengths about +/-2mills. Both traces should always via down or up as close as possible to each other to keep the differential traces routed with the correct spacing for the entire lengh. Under the ADS54J60EVM product folder on the TI website, you can download the complete board design files to be used as an example. I have also attached two other documents which lists techniques used for high speed board design.

Regards,

Jim

Techniques for High Speed PCB Layout.docx

High Speed Serial Link Layout Recommendations.pptx

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ADS54J60 - Reset question