About AM335x power supply noise limitation

g.f.

Hi,

I have a question about AM335x input voltage noise.

In AM335x datasheet(sprs717f.pdf) page. 105 Table 4-1,
VDDA1P8V_USB0/VDDS_PLL_MPU/VDDS_PLL_CORE_LCD/VDDS_PLL_DDR has requirement for supply noise.
These all supply are required as follow:
MAX 50mV peak-peak supply noise

I want to be sure about noise requirement.
Is there peak-peak supply noise requirement for other Power supply?
Or if the power supply is in the range of "Recommended Operating Conditions",
it would be okay?

best regards,
g.f.

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Hi g.f,

There are no peak-to-peak noise specifications for the other power supplies. However proper routing and decoupling must be provided to reduce power supply noise to a minimum. I would suggest that <=50mVp-p should be observed on all power supplies.

0 g.f. over 11 years ago in reply to Biser Gatchev-XID

Guru 15520 points

Hi Biser,

Thank you for the reply.

I understand. I will tell my customer which you suggested.

best regards,
g.f.

0 Tony Wang over 9 years ago in reply to g.f.

Intellectual 310 points

Hi Biser,

Which bandwidth the 50mVp-p should be in?

I saw the noise margins listed in all ARM processor data sheets, but I don't see the bandwidth specified.

Thanks,

Tony

0 Tony Wang over 9 years ago in reply to Biser Gatchev-XID

Intellectual 310 points

Hi Biser,

Which bandwidth the 50mVp-p should be in?

I saw the noise margins listed in all ARM processor data sheets, but I don't see the bandwidth specified.

Thanks,

Tony

0 peaves over 9 years ago in reply to Tony Wang

TI__Guru 62945 points

DC to infinity.

Regards,
Paul

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About AM335x power supply noise limitation