10.1.5.1 Decoupling Capacitors

Place decoupling capacitors so that they minimize the distance from the decoupling capacitor to the supply and ground pin of the component. Follow these specific guidelines:

• Locate the supply voltage pin of the capacitor close to the DMD supply voltage pin(s). The decoupling capacitor needs vias to ground and voltage planes. The DMD can be connected directly to the decoupling capacitor (no via) if the trace length is less than 0.1 inch. Otherwise, tie the component to the voltage or ground plane through separate vias.
• Make sure that the trace lengths of the voltage and ground connections for decoupling capacitors and components is less than 0.1 inch to minimize inductance.
• Make the trace width of the power and ground connection to decoupling capacitors and components as wide as possible to minimize inductance.
• Connecting decoupling capacitors to ground and power planes through multiple vias can reduce inductance and improve noise performance.
• Decoupling performance can be improved by utilizing low ESR and low ESL capacitors.