Hello,
I am using CYGNAL C8051Fxxx (100 pin) for a new project ,but the
package is TQFP so I decide to make athrough hole adapter for that,
the adapter PCB size 60mm X 60 mm with only one TQFP mounted .

I include decoupling capacitors on this adapter PCB ,which will in turn be
mounted on the main Card from all four sides with pin connectors.

Since it is mixed signal uC including an ADC please tell me
will it be advisable to do such a thing . I am making two seperate
Planes AGND DGND on this adapter PCB ,then with 4 pin connectors I
join DGND to the main PCB'S DGND and with 2 pin connectors join
adapter AGND to the main PCB'S AGND and connect them together on the
main PCB througn a low impedance component .

Kindly tell me what precautions to take if designing such a type of
card .

Suggestions awaited ! !

Tom P