SX8724C Datasheet, PDF (63/67 Pages) Semtech Corporation – ZoomingADC for sensing data acquisition

ADVANCED COMMUNICATIONS & SENSING
MECHANICAL
SX8724C
ZoomingADC for sensing data acquisition
DATASHEET
14 PCB Layout Considerations
PCB layout considerations to be taken when using the SX8724C are relatively simple to get the highest performances
out of the ZoomingADC. The most important to achieve good performances out the ZoomingADC is to have a good
voltage reference. The SX8724C has already an internal reference that is good enough to get the best performances
with a minimal amount of external components, but, in case an external reference is needed this one must be as clean
as possible in order to get the desired performance. Separating the digital from the analog lines will be also a good
choice to reduce the noise induced by the digital lines. It is also advised to have separated ground planes for digital
and analog signals with the shortest return path, as well as making the power supply lines as wider as possible and to
have good decoupling capacitors.
15 How to Evaluate
For evaluation purposes SX8724CEVK evaluation kit can be ordered. This kit connects to any PC using a USB port. The
"SX87xx Evaluation Tools" software gives the user the ability to control the SX8724C registers as well as getting the raw
data from the ZoomingADC and displaying it on the "Graphical User interface". For more information please look at
SEMTECH web site (http://www.semtech.com).
Revision 1.01
© Semtech
January 2011
Page 63
www.semtech.com/products/