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Prahlad J. Purohit
03/27/06 21:15
Read: 725 times
Mumbai
India


 
#113279 - Location of Supply section.
Dear Friends,

Untill now all my mixed sigal designs were mains powered in these products I used a suppy transformer with primary connected to mains and used two separate secondaries 9V each for generating separate 5V Vcc for supplying analog and digital sections as shown below.


Now I am desisigning a small handheld device which is going to use a 7.2V Ni-Cd rechargeable battery. In this case in order to keep things simple and smaller I am planning to use common supply regulator / section for both analog and digital sections. But still want to use separate ground planes since I target 12 bit resolution from ADC [ in dsPIC ].

I am not able to decide what would be the best location to place the supply section i.e. linear LDO regulator so that it will give best results. I have marked three location where I think I can place it?

Is it going to help if I use to separate regulator / supply sections for analog and digital [ battery is common ]?



Thanks & Regards,
Prahlad Purohit



List of 13 messages in thread
TopicAuthorDate
Location of Supply section.      Prahlad J. Purohit      03/27/06 21:15      
   Traversing the gap using a pi-filter        Kai Klaas      03/28/06 05:50      
      Making a new dsPIC board.      Prahlad J. Purohit      03/28/06 06:15      
         7 AAAs better than one block      Kai Klaas      03/28/06 06:45      
            7.2V Pack      Prahlad J. Purohit      03/28/06 06:51      
               for handheld/battery      Erik Malund      03/28/06 06:57      
                  I am planning to use 700mAh rechargeable      Prahlad J. Purohit      03/28/06 07:23      
               7.2V block = 120mAh!      Kai Klaas      03/28/06 08:53      
                  700mAh 7.2V block available here.      Prahlad J. Purohit      03/28/06 20:55      
      transformers        Steve M. Taylor      03/29/06 07:28      
         Screens      Kai Klaas      03/29/06 09:02      
         How do you do it?      Jon Ledbetter      03/29/06 09:12      
            Manufacturer      Kai Klaas      03/29/06 09:16      

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