sx8725s Semtech Corporation, sx8725s Datasheet - Page 65

• Manufacturer Part Number: sx8725s
• Description: Zoomingadc For Sensing Data Acquisition
• Manufacturer: Semtech Corporation

Revision 1.0
© Semtech
MECHANICAL
14 PCB Layout Considerations
PCB layout considerations to be taken when using the SX8725S 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 SX8725S 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 SX8724SEVK evaluation kit can be ordered. This kit connects to any PC using a USB port. A
software gives the user the ability to control the 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
www.semtech.com/analog-controllers-sensors-converters/).
ADVANCED COMMUNICATIONS & SENSING
February 2011
Page 65
ZoomingADC for sensing data acquisition
SX8725S
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