WM8711L_11 Datasheet, PDF (1/44 Pages) Wolfson Microelectronics plc – Internet Audio DAC with Integrated Headphone Amplifier

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WM8711L
Internet Audio DAC with Integrated Headphone Amplifier
DESCRIPTION
The WM8711L is a low power stereo DAC with an integrated
headphone driver. The WM8711L is designed specifically for
portable MP3 audio and speech players. The WM8711L is
also ideal for MD, CD machines and DAT players.
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 a small 28-
lead QFN (5x5x0.9 mm body) package.
A USB 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 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
 28-lead QFN (5x5x0.9 mm) package
APPLICATIONS
 Portable MP3 Players
 CD and Minidisc Players
WOLFSON MICROELECTRONICS plc
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Production Data, August 2011, Rev 4.5
Copyright 2011 Wolfson Microelectronics plc