WM8751L Datasheet, PDF (1/45 Pages) Wolfson Microelectronics plc – STEREO DAC FOR PORTABLE AUDIO APPLICATIONS

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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