Features: • Audio Performance− 108dB SNR ('A' weighted @ 48kHz) DAC− 102dB SNR ('A' weighted @ 48kHz) ADC
• DAC Sampling Frequency: 32kHz 192kHz
• ADC Sampling Frequency: 32kHz 96kHz
• Five stereo ADC inputs with analogue gain adjust from+24dB to 21dB in 0.5dB steps
• Programmable Limiter or Automatic Level Control (ALC)
• Stereo DAC with independent analogue and digitalvolume controls
• Stereo Headphone and Line Output
• 3-Wire SPI Compatible or 2-Wire Software SerialControl Interface
• Master or Slave Clocking Mode
• Programmable Audio Data Interface Modes− I2S, Left, Right Justified or DSP− 16/20/24/32 bit Word Lengths
• Analogue Bypass Path Feature
• Selectable AUX input to the volume controls
• 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supplyOperationApplication• Surround Sound AV Processors and Hi-Fi systems
• DVD-RWPinout
Specifications
| CONDITION |
MIN |
MAX |
| Digital supply voltage |
-0.3V |
+3.63V |
| Analogue supply voltage |
-0.3V |
+7V |
| Voltage range digital inputs (DI, CL, CE an MODE) |
DGND -0.3V |
+7V |
| Voltage range digital inputs (MCLK, DIN, ADCLRC, DACLRC,ADCBCLK and DACBCLK) |
DGND -0.3V |
DVDD + 0.3V |
| Voltage range digital inputs |
AGND -0.3V |
AVDD +0.3V |
| Master Clock Frequency |
|
37MHz |
| Operating temperature range, TA |
-25°C |
+85°C |
| Storage temperature |
-65°C |
+150°C |
DescriptionThe WM8776 is a high performance, stereo audio codecwith five channel input selector. The WM8776 is ideal forsurround sound processing applications for home hi-fi,DVD-RW and other audio visual equipment.
A stereo 24-bit multi-bit sigma delta ADC of the WM8776 is used with afive stereo channel input mixer. Each ADC channel hasprogrammable gain control with automatic level control.Digital audio output word lengths from 16-32 bits andsampling rates from 32kHz to 96kHz are supported.A stereo 24-bit multi-bit sigma delta DAC is used withdigital audio input word lengths from 16-32 bits andsampling rates from 32kHz to 192kHz. The DAC has aninput mixer allowing an external analogue signal to bemixed with the DAC signal. There are also Headphoneand line outputs, with volume controls for theheadphones.
The WM8776 supports fully independent sample ratesfor the ADC and DAC. The audio data interface supportsI2S, left justified, right justified and DSP formats.The device is controlled in software via a 2 or 3 wireserial interface, selected by the MODE pin, whichprovides access to all features including channelselection, volume controls, mutes, and de-emphasisfacilities.
The WM8776 is available in a 48-pin TQFP package.
WM8776 Data Sheet
