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DESCRIPTION
The WM8720 is a high performance stereo DAC designed
for audio applications such as CD, DVD, home theatre
systems, set top boxes and digital TV. The WM8720
supports data input word lengths from 16 to 24-bits and
sampling rates up to 96kHz. The WM8720 consists of a
serial interface port, digital interpolation filter, multi-bit
sigma delta modulator and stereo DAC in a small 20-pin
SSOP package. The WM8720 also includes a digitally
controllable mute and attenuator function on each channel.
The WM8720 supports a variety of connection schemes for
audio DAC control. The SPI-compatible serial control port
provides access to a wide range of features including on-
chip mute, attenuation and phase reversal. A hardware
controllable interface is also available.
The programmable data input port supports a variety of
glueless interfaces to popular DSPs, audio decoders and
S/PDIF and AES/EBU receivers.
WM8720
24-bit, 96kHz Stereo DAC with Volume Control
FEATURES
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Performance:
- 102dB SNR (‘A’ weighted @48kHz),
- THD: -95dB @ 0dB FS
5V or 3.3V supply operation
Sampling frequency: 8kHz to 96kHz
Input data word: 16 to 24-bit
Hardware or SPI compatible serial port control modes:
- Hardware mode: system clock, reset, mute,
de-emphasis
- Serial control mode: mute, de-emphasis, digital
attenuation (256 steps), zero mute, phase reversal,
power down
APPLICATIONS
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CD, DVD audio
Home theatre systems
Set top boxes
Digital TV
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Production Data, February 2005, Rev 4.0
Copyright
2005
Wolfson Microelectronics plc
.
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
