DatasheetsPDF.com

WM8721

Wolfson Microelectronics plc
Part Number WM8721
Manufacturer Wolfson Microelectronics plc
Description Internet Audio DAC with Integrated Headphone Driver
Published Apr 17, 2005
Detailed Description WM8721 Internet Audio DAC with Integrated Headphone Driver Product Preview, November 2000, Rev 1.3 DESCRIPTION The WM...
Datasheet PDF File WM8721 PDF File

WM8721
WM8721


Overview
WM8721 Internet Audio DAC with Integrated Headphone Driver Product Preview, November 2000, Rev 1.
3 DESCRIPTION The WM8721 is a low power stereo DAC with an integrated headphone driver.
The WM8721 is designed specifically for portable MP3 audio and speech players.
The WM8721 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 20pin SSOP package.
A USB mode is provided where all audio rates can be derived from a simple 12MHz MCLK, saving on need for PLL or multiple crystals.
FEATURES • Audio Performance − 100dB SNR (‘A’ weighted @ 48kHz) DAC − 1.
42 – 3.
6V Digital Supply Operation − 2.
7 – 3.
6V 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 • Stereo Audio Outputs • Output Volume and Mute Controls • Highly Efficient Headphone Driver • Playback Mode Power Consumption < 18mW • 20-Pin SSOP Package APPLICATIONS • Portable MP3 Players • CD and Minidisc Players BLOCK DIAGRAM CSB SDIN SCLK MODE AVDD VMID AGND DACDAT (3) DACLRC (4) BCLK (2) (15) (16) (17) (14) (11) (13) (12) WM8721 CONTROL INTERFACE DIGITAL FILTERS DAC +6 to -73dB 1 dB Steps VOL/ MUTE H/P DRIVER DIGTAL AUDIO INTERFACE CLKIN DIVIDER (Div x1, x2) (18) DAC (19) (1) (20) VOL/ MUTE H/P DRIVER +6 to -73dB 1 dB Steps (5) HPVD...



Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)