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Sound Card PCB Design

Like the whole family of sound cards from Creative, this one is made of dark-brown glass-cloth laminate and has gold-plated connectors for better conductivity. Audigy2 is equipped with a powerful CA0102-IAT digital signal processor. It replaced E-MU10K1 and inherited quite a few of its features. A glance at the card says that there are fewer details. It’s because nearly the entire analog part has been moved to the external module, while the PCB itself carries only an eight-channel Cirrus Logic CS4382 DAC (192KHz/24bit) that serves its analog outputs. This solution has its advantages and shortcomings. The negative points: the card has no internal analog (as well as digital) connectors for attaching audio devices installed inside the chassis (for example, the analog output of the CD-ROM, the audio channel of some TV-tuners). The card only has a connector onboard for additional power supply (to support FireWire devices) and a joystick connector (the bracket with the joystick port is included).

CS4382 DAC from Cirrus Logic features an analog filter system and per-channel volume control. Thanks to its adequate characteristics, it found its way into many sound cards.


CS4382 DAC flowchart

CS4382

Capacity:

24bit

Sampling frequency:

192kHz (max)

Channels:

8

Dynamic range:

114dB

THD+N:

-100dB

The bracket of the sound card carries:

  • Three mini-jacks for analog output;
  • AD_LINK 1 and AD_LINK 2 – to connect the card to the communication module.

Internal connectors:

  • 15-pin MIDI/Joystick connector;
  • Additional power supply connector.
 
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