WM8711BL

w WM8711BL Ultra-Small Audio DAC with Headphone Amplifier DESCRIPTION The WM8711BL is an ultra-small, low power stereo DAC with an integrated headphone driver. It is designed specifically for portable audio systems requiring hi-fi stereo playback through headphones. Stereo 24-bit multi-bit sigma delta DACs are used with oversampling digital interpolation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 96kHz are supported. Stereo audio outputs are buffered for driving headphones from a programmable volume control, line level outputs are also provided along with anti-thump mute and power up/down circuitry. 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 an ultrasmall 24-lead QFN (4x4x0.9 mm Body) package. A USB clocking mode is provided where all audio rates can be derived from a single 12MHz or 24MHz MCLK, saving on the need for a PLL or multiple crystals. BLOCK DIAGRAM FEATURES  Audio Performance - DAC SNR 97dB (‘A’ weighted) at AVDD = 3.3V - DAC SNR 90dB (‘A’ weighted) at AVDD = 1.8V  Low Power Headphone Playback - Down to 6mW at 1.8V - 1.42 – 3.6V Digital Supply Operation - 1.8 – 3.6 V Analogue Supply Operation  DAC Sampling Frequency: 8kHz – 96kHz  2 or 3-Wire MPU Serial Control Interface  Programmable Audio Data Interface Modes - I2S, Left, Right Jus...