Knowledge Is Power In Selecting Audio Dacs

摘要

Consumers are looking for more and better functionality on their portable multimedia players. System designers have responded by creating increasingly complex systems, yet they must continue to balance cool features with small size and low power consumption. The se- lection of the audio DAC not only has a big impact on the audio performance of the PMP (portable media player) but also in extending battery life of the player. PMP designers may spend hours scrutinizing the claims made by different silicon ven- dors in order to select an audio DAC. Their task is complicated because vendors spec parts differently. Indeed, audio input and output subsystems are especially tricky, since they include both analog and digital circuitry, typically with several separate supply voltages.