DESCRIPTION

The WM8912 is a high performance ultra-low power stereo DAC optimised for portable audio applications.

The device features stereo ground-referenced headphone amplifiers using the Wolfson ‘Class-W’ amplifier techniques - incorporating an innovative dual-mode charge pump architecture - to optimise efficiency and power consumption during playback. The ground-referenced outputs eliminate headphone coupling capacitors. The outputs include common mode feedback paths to reject ground noise.

FEATURES

• 3.8mW quiescent power consumption for DAC to headphone playback

• DAC SNR 96dB typical, THD -86dB typical

• Class W ground-referenced headphone driver

- 28mW per channel into 30 at <1 THD

- 32mW per channel into 15 at <1 THD

• Dynamic range controller

• ReTune™ Mobile parametric equalizer

• Integrated control write sequencer for pop minimised startup and shutdown

• Single register write for default start-up and shutdown sequences

• On-chip FLL provides all necessary clocks

• DAC supports standard sample rates from 8kHz to 96kHz

• 32-pin QFN package (4x4mm, 0.4mm pitch)

APPLICATIONS

• Portable multimedia players

• Multimedia handsets

• Handheld gaming

WM8912属于集成电路（IC） > ADC/DAC - 特殊用途。凌云逻辑制造生产的WM8912ADC/DAC - 特殊用途该产品族中的产品可用于模拟和数字表示的信息转换，适用于特定用例，或集成了通用数据转换器中不常见的其他功能。例如针对超声或汽车雷达应用集成了低噪声放大器和可变增益级的器件、注重音频和视频的产品、在段码式显示器上集成显示测量值功能的器件、集成输入输出电气隔离的器件等。