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WM8718_06 Datasheet, PDF (1/32 Pages) Wolfson Microelectronics plc – 24 Bit Differential Stereo DAC with Volume Control | |||
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WM8718
24 Bit Differential Stereo DAC with Volume Control
DESCRIPTION
The WM8718 is a high performance differential stereo DAC
designed for audio applications such as DVD, home theatre
systems and digital TV. The WM8718 supports PCM data
input word lengths from 16 to 32-bits and sampling rates up
to 192kHz. The WM8718 consists of a serial interface port,
digital interpolation filters, multi-bit sigma delta modulators
and differential stereo DAC in a small 20-lead SSOP
package or 24-lead QFN package. The WM8718 includes a
digitally controllable mute, an attenuate function and zero
flag output for each channel.
The 3-wire serial control port provides access to a wide
range of features including on-chip mute, attenuation and
phase reversal.
The WM8718 is an ideal device to interface to AC-3â¢,
DTSâ¢, and MPEG audio decoders for surround sound
applications, or for use in DVD players including those
supporting DVD-A.
BLOCK DIAGRAM
FEATURES
⢠24 bit Stereo DAC
⢠Fully Differential Voltage Outputs
⢠Audio Performance
- 111dB SNR (âAâ weighted @ 48kHz) DAC
- -100dB THD
⢠DAC Sampling Frequency: 8kHz - 192kHz
⢠3 Wire Serial Control Interface
⢠Programmable Audio Data Interface Modes
- I2S, Left, Right Justified, DSP
- 16/20/24/32 bit Word Lengths
⢠Independent Digital Volume Control on Each Channel with
127.5dB Range in 0.5dB Steps
⢠Independent Zero Flag Outputs
⢠3.0V - 5.5V Supply Operation
⢠20-lead SSOP Package or 24-lead QFN Package
APPLICATIONS
⢠CD, DVD, and DVD-Audio Players
⢠Home theatre systems
⢠Professional mixing desks
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WM8718
CONTROL
INTERFACE
ZEROFR
ZEROFL
BCKIN
LRCIN
DIN
AUDIO
INTERFACE
ATT/
MUTE
ATT/
MUTE
DIGITAL
FILTERS
SIGMA
DELTA
MODULATOR
SIGMA
DELTA
MODULATOR
DAC
DAC
VOUTRP
VOUTRN
VOUTLP
VOUTLN
VMID
WOLFSON MICROELECTRONICS plc
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Production Data, November 2006, Rev 4.3
Copyright ©2006 Wolfson Microelectronics plc
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