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WM8711BL

Wolfson Microelectronics
Part Number WM8711BL
Manufacturer Wolfson Microelectronics
Description Ultra-Small Audio DAC
Published Apr 23, 2007
Detailed Description w WM8711BL Ultra-Small Audio DAC with Headphone Amplifier DESCRIPTION The WM8711BL is an ultra-small, low power stere...
Datasheet PDF File WM8711BL PDF File

WM8711BL
WM8711BL

Overview
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 Justified or DSP - 16/20/24/32 bit Word Lengths - Master or Slave Clocking Mode  Stereo Audio Outputs  Output Volume and Mute Controls  Highly Efficient Headphone Driver  24-lead QFN (4x4x0.
9 mm) package APPLICATIONS  Multimedia Mobile Phones  Portable MP3 / CD Players CSB SDIN SCLK MODE AVDD VMID AGND WM8711B CONTROL INTERFACE DACDAT DACLRC BCLK DIGTAL AUDIO INTERFACE DIGITAL FILTERS MUTE DAC DAC OSC CLKIN DIVIDER (Div x1, x2) CLKIN DIVIDER (Div x1, x2) MUTE VOL/ MUTE +6 to -73dB...


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