portable
digital audio
solutions
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WM8711 WM8721 WM8731
www.wolfsonmicro.com
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Wolfson’s new family of audio ICs for portable applications offers highly integrated, DSP
independent solutions that deliver CD quality sound at very low power consumption. The family
includes a full audio codec, WM8731, and two DACs, WM8711 and WM8721. All three devices
incorporate a powerful headphone amplifier whose output volume can be digitally controlled.
Each IC is available as a standard or low voltage part, operating at supply voltages down to
1.42V (digital) and 1.8V (analogue).
Using a unique USB clocking scheme, these ICs can generate 44.1kHz, 48kHz, 96kHz and other
commonly used sample rates directly from a 12 or 24MHz clock, eliminating the need for a PLL
in applications such as MP3 players. The WM8711 and WM8731 are pin-compatible and feature
an on-chip clock oscillator to supply the system clock.
Wolfson’s portable audio ICs have a very flexible audio interface which can interface to any
industry standard DSP or other digital audio chip, thereby providing designers with a higher
degree of flexibility.
long battery life
AUDIO DACs AND CODECS
FOR BATTERY-POWERED APPLICATIONS
productbenefits
cd sound quality
powerful headphone
amplifier
highly integrated solution
dsp independent
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device
device type
digital supply voltage
analogue supply voltage
analogue line-in
microphone input
on-chip clock generator
package
WM8721
dac
1.42V – 3.6V
2.7V – 3.6V
no
no
no
20-pin SSOP
WM8721L
dac (low voltage)
1.42V – 3.6V
1.8V – 3.6V
no
no
no
20-pin SSOP
WM8711
dac
1.42V – 3.6V
2.7V – 3.6V
yes
no
yes
28-pin SSOP
WM8711L
dac (low voltage)
1.42V – 3.6V
1.8V – 3.6V
yes
no
yes
28-pin SSOP
WM8731
codec
1.42V – 3.6V
2.7V – 3.6V
yes
yes
yes
28-pin SSOP
WM8731L
codec (low voltage)
1.42V – 3.6V
1.8V – 3.6V
yes
yes
yes
28-pin SSOP
wolfson
microelectronics
::
leading world experts
in the design of signal processing electronics_
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
