The power applied to the V_DD pin should be well regulated and low noise. Switching power supplies and DC-DC converters often have high frequency glitches or spikes riding on the output voltage. In addition, digital components can create similar high-frequency spikes as the internal logic switches states. This noise can easily couple into the DAC output voltage through various paths between power connections and analog output. As with the GND connection, the V_DD pin should be connected to a power-supply plane of trace that is separate from the connection for digital logic until they are connected at the power-entry point. In addition, the use of a 1-µF and 10-µF capacitor and a 0.1-µF bypass capacitor is strongly recommended. In some situations, additional bypassing may be required, such as a 100-µF electrolytic capacitor or even a Pi filter made up of inductors and capacitors. These bypassing methods are all designed to low-pass filter the supply and remove the high-frequency noise.