wm8594seft-v Wolfson Microelectronics plc, wm8594seft-v Datasheet - Page 17

• Manufacturer Part Number: wm8594seft-v
• Description: 24-bit 192khz 2vrms Multi-channel Codec
• Manufacturer: Wolfson Microelectronics plc

Production Data
DEVICE DESCRIPTION
INTRODUCTION
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The WM8594 is a high performance multi-channel audio CODEC with 2Vrms line level inputs and
outputs and flexible analogue input / output switching. The device comprises a 24-bit stereo ADC,
two 24-bit stereo DACs with independent sampling rates and digital volume control, and a flexible
analogue input and output multiplexer. Analogue inputs and outputs are all at 2Vrms line level,
minimising external component count.
The DACs can operate from independent left/right clocks, bit clocks and master clocks with
independent data inputs. Alternatively, the DACs can be synchronised to use the same clocks with
independent data inputs. Each of the DAC audio interfaces can be configured to operate in ether
master or slave clocking modes. In master mode, left/right clocks and bit clocks are all outputs. In
slave mode, left/right clocks and bit clocks are all inputs.
The ADC uses a separate left/right clock, bit clock and master clock, allowing independent recording
and playback in audio applications. The ADC audio interface can be configured to operate in either
master or slave clocking mode. In master mode, left/right clocks and bit clocks are all outputs. In
slave mode, left/right clocks and bit clocks are all inputs.
The ADC includes digital gain control, allowing signals to be gained and attenuated between +30dB
and -97dB in 0.5dB steps.
The DACs include independent digital volume control, which is adjustable between +12dB and -100
dB in 0.5dB steps. The DACs can be configured to output stereo audio data and a range of mono
audio options.
The input multiplexer accepts five stereo line level inputs at up to 2Vrms. One stereo input can be
routed to the ADC, and all five stereo inputs can be routed to the output multiplexer.
The output multiplexer includes analogue volume control with zero cross, adjustable between +6dB
and -73.5dB in 0.5dB steps, and configurable soft ramp rate. Analogue audio is output at 2Vrms line
level.
Control of the internal functionality of the device is by 2-wire serial control interface with readback.
The interface may be asynchronous to the audio data interface as control data will be re-
synchronised to the audio processing internally. In addition, control of mute, power-down and reset
may also be achieved by pin selection.
Operation using system clocks of 128fs, 192fs, 256fs, 384fs, 512fs, 768fs or 1152fs is provided.
ADC and both DACs may be clocked independently. Sampling rates from 32kHz to 192kHz are
supported for both DACs provided the appropriate master clocks are input. Sampling rates from
32kHz to 96kHz are supported for the ADC provided the appropriate master clock is input.
The audio data interface supports right justified, left justified, and I
highly flexible DSP serial port interface format.
2
S interface formats along with a
PD Rev 4.1 July 2008
WM8594
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