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WM8751L

Stereo DAC For Portable Audio Applications

Wolfson Microelectronics plc 

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WM8751L

Stereo DAC For Portable Audio Applications

DESCRIPTION

FEATURES

The WM8751L is a low power, high quality stereo DAC with

integrated headphone and loudspeaker amplifiers, designed to

reduce external component requirements in portable digital

audio applications.

The on-chip headphone amplifiers can deliver 40mW into a 16Ω

load. Advanced on-chip digital signal processing performs bass

and treble tone control.

The WM8751L can operate as a master or a slave, with various

master clock frequencies including 12 or 24MHz for USB

devices or standard 256fs rates like 12.288MHz and

24.576MHz. Different audio sample rates such as 96kHz,

48kHz, 44.1kHz are generated directly from the master clock

without the need for an external PLL.

The WM8751L operates on supply voltages from 1.8V up to

3.6V, although the digital core can operate on a separate supply

down to 1.42V, saving power. Different sections of the chip can

also be powered down under software control.

The WM8751L is supplied in a very small and thin 5x5mm QFN

package, ideal for use in hand-held and portable systems.

• DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz, 3.3V)

• On-chip 400mW BTL Speaker Driver (mono)

• On-chip Headphone Driver

- 40mW output power on 16Ω / 3.3V

- SNR 96dB, THD –79dB at 20mW with 16Ω load

• Stereo and Mono Line-in mix into DAC output

• Separately Mixed Stereo and Mono Outputs

• Digital Tone Control and Bass Boost

• Low Power

- Down to 7mW for stereo playback (1.8V / 1.5V supplies)

- 10µW Shutdown Mode

• Low Supply Voltages

- Analogue and Digital I/O: 1.8V to 3.6V

- Digital core: 1.42V to 3.6V

• 256fs / 384fs or USB master clock rates: 12MHz, 24MHz

• Audio sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1,

48, 88.2, 96kHz generated internally from master clock

• 32-lead QFN package, 5x5x0.9mm size, 0.5mm lead pitch

APPLICATIONS

• Digital Audio Player

• MP3 Phone

• Minidisc Player

BLOCK DIAGRAM

WOLFSON MICROELECTRONICS plc

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Production Data, August 2006, Rev 4.2

Copyright ©2006 Wolfson Microelectronics plc

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