WM8739L

WM8739 / WM8739L Stereo Audio ADC DESCRIPTION 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. 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 DIAGRAM FEATURES 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) - 1.42 – 3.6V Digital Supply (both versions) Input Volume and Mute Controls ADC Sampling Frequency: 8KHz – 96KHz Selectable ADC High Pass Filter 2 or 3-Wire MPU Serial Control Interface Programmable Audio Data Interface Modes - I2S, Left, Right Justified or DSP - 16/20/24/32 bit Word Lengths - ...