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DIT4096 POWER SUPPLY TROUBLE

Matthieu CLAIRE
Prodigy 40 points
Other Parts Discussed in Thread: DIT4096

Hi,

I made a design using the DIT4096 and I have trouble with the power supply

I have one LDO whom provides 5V on VBUS

and another LDO whom uses the 5V to prodive 3,3V on VDDAM 

To do my test I started by not soldered R49 so I power only the pin19 VDD (the Digital Core Power-Supply) at +5V 

And I have the surprise to have 4,3V on the pin 7 call in the datasheet Vio (Digital I/O Power Supply, +2.7V to VDD)

And of course if I solder R49 to connect Vio to VDDAM my 3,3V is affected and I have 4,3V on VDDAM.

I don't understand does I have a broken DIT4096?

 Do you see something wrong with my schematic?

 

Thanks in advance for your help

  • 0
    Prodigy 40 points

    I found the issue I use +5V to put to High Level the digital IO it must be +3,3V

    So you need to provide 5V only to the pin 19 to avoid any trouble.

    WARNING there is a mistake in the schematic notes to set the DIT4096 to 256fs you must have R47 and R48 soldered and DNI R50 and R42 

     

    Have a nice christmas