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The WM8718 is a high performance differential stereo DACdesigned for audio applications such as DVD, home theatresystems and digital TV. The WM8718 supports PCM datainput word lengths from 16 to 32-bits and sampling rates upto 192kHz. The WM8718 consists of a serial interface port,digital interpolation filters, multi-bit sigma delta modulatorsand differential stereo DAC in a small 20-pin SSOPpackage. The WM8718 includes a digitally controllablemute, an attenuate function and zero flag output for eachchannel.
The 3-wire serial control port provides access to a widerange of features including on-chip mute, attenuation andphase reversal.
The WM8718 is an ideal device to interface to AC-3,DTS, and MPEG audio decoders for surround soundapplications, or for use in DVD players including thosesupporting DVD-A.
WM8718 Maximum Ratings
CONDITION
MIN
MAX
Digital supply voltage (DVDD)
-0.3V
+7V
Analogue supply voltage (AVDD)
-0.3V
+7V
Voltage range digital inputs
DGND -0.3V
VDD +0.3V
Master Clock Frequency
37MHz
Operating temperature range, TA
-25oC
+85oC
Storage temperature (TQFP package only)
-65oC
+150oC
WM8718 Features
• 24 bit Stereo DAC • Fully Differential Voltage Outputs • Audio Performance- 111dB SNR ('A' 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 with127.5dB Range in 0.5dB Steps • Independent Zero Flag Outputs • 3.0V - 5.5V Supply Operation • 20-pin SSOP Package
WM8718 Typical Application
• CD, DVD, and DVD-Audio Players • Home theatre systems • Professional mixing desks