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DESCRIPTION
The WM8594 is a high performance multi-channel audio
CODEC with flexible input/output selection and digital and
analogue volume control. Features include a 24-bit stereo
ADC with digital gain control, two 24-bit DACs with
independent digital volume control, and a range of
input/output channel selection options with analogue volume
control, for flexible routing within current and future audio
systems.
The WM8594 accepts five stereo audio inputs at line levels
up to 2Vrms. One stereo input can be routed to the ADC. All
inputs can be routed to the output.
The WM8594 outputs three stereo audio channels at line
levels up to 2Vrms, which can be selected from any of the
analogue inputs and DAC outputs. Additionally, one stereo
output is available with a headphone driver. The DAC
channels include independent digital volume control, and all
three stereo output channels include analogue volume
control with soft ramp.
The WM8594 supports up to 2Vrms analogue inputs, 2Vrms
outputs, with sampling rates from 32kHz to 192kHz for the
DACs, and 32kHz to 96kHz for the ADC.
The WM8594 is ideal for audio applications requiring high
performance and flexible routing options, including flat panel
digital TV and DVD recorder.
The device is controlled via a serial interface with support
for 2-wire and 3-wire control with full readback. Control of
mute, powerdown and reset can also be achieved by pin
selection.
The WM8594 is available in a 48-lead TQFP package.
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WM8594
24-bit 192kHz 2Vrms Multi-Channel CODEC
FEATURES
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Multi-channel CODEC with 5 stereo input selector and 3
stereo output selector
4-channel DAC, 2-channel ADC
Five stereo 2Vrms stereo inputs with analogue bypass to
three stereo 2Vrms outputs
Stereo headphone driver
Audio performance
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DAC: 100dB SNR typical (‘A’ weighted @ 48kHz)
DAC: -90dB THD typical
ADC: 100dB SNR typical (‘A’ weighted @ 48kHz)
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ADC: -90dB THD typical
Independent sampling rates for ADC, DAC1 and DAC2
DACs sampling frequency 32kHz to 192kHz
ADC sampling frequency 32kHz to 96kHz
ADC digital gain control: +30dB to -97dB
DAC digital volume control: +12dB to -100dB
Analogue Volume control with soft ramp: +6dB to -73.5dB
All volume controls include zero cross detection to prevent
pops and clicks
2 and 3-wire serial control interface with readback and
hardware reset, mute and powerdown pins
Master or slave clocking modes
Programmable format audio data interface modes
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S, LJ, RJ, DSP
3.3V / 9V analogue, 3.3V digital supply operation
48-lead TQFP package
APPLICATIONS
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Digital Flat Panel TV
DVD-RW
WOLFSON MICROELECTRONICS plc
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Product Preview, January 2007, Rev 1.0
Copyright
©2007
Wolfson Microelectronics plc
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
