Wolfson Microelectronics plc WM8739
The WM8739 is a stereo audio ADC. The WM8739 is designed specifically for portable MP3 audio and speech players and recorders. The WM8739 is also ideal for MD, CD-RW machines and DAT recorders.DESCRIPTION
The WM8739 is a stereo audio ADC. Stereo line-level audio inputs are provided, along with a mute and volume function, and master or slave mode clocking schemes. The device also has a programmable high pass filter to remove residual DC offsets. Stereo 24-bit multi-bit sigma delta ADCs are used with oversampling digital interpolation and digital filters. Digital audio output word lengths from 16-32 bits and sampling rates from 8KHz to 96KHz are supported. The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including volume controls, mutes, de-emphasis and extensive power management facilities. The device is available in a small 20pin SSOP package. BLOCK DIAGRAMFEATURES
● 90dB SNR (‘A’ weighted @ 48kHz) ADC● Low Power - 12mW all-on, 1.4mW standby (‘L’ version) - 41mW all-on, 5.3mW standby (standard version)
● Low Supply Voltages - 1.8 – 3.6V Analogue Supply (‘L’ version) - 2.7 – 3.6V Analogue Supply (standard version) -...