TMS320F28035: ADC VREFHI max current

Hi Matt,

I found an e2e which says may 150uA (average) and peak 3.5mA:

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/427246/tms320f28035-vrfhi-current?tisearch=e2e-sitesearch&keymatch=vrefhi%25252525252525252520current#

Regards, Holger

Thanks for finding this post. 

Reading through this I would note that the ADC on the F2803x is significantly different than the one on the F2837x; and as Joe said that peak current draw should be supplied by the bulk cap we require on VREFHI/VREFLO.  I don't expect 2803x to be any worse here, but as the previous post had mentioned 3.5mA is pretty substantial requirement.  If customer designs to this that is fine, but it may be over-design to accommodate 3.5mA.

I assume customer is supplying this externally is why they need this info.

Best,

Matthew

Hi Matt,
what is the recommendation of the bulk cap on VREFHI? Is it documented somewhere?

Regards, Holger