This document introduces the Cirrus Logic CRD4201-2 Advanced Communications Riser (ACR) reference design, which features six channel analog audio outputs and a optical S/PDIF digital output. This board uses the CS4201 audio codec, which has many advanced features such as a built-in headphone amplifier, up to 30 dB of microphone boost and serial digital audio outputs. The reference design is available by ordering the CMK4201-2 manufacturing kit. This kit includes a full set of schematic design files (OrCAD® 7.2 and Or- CAD® 9.1 formats), PCB job files (PADS® ASCII), PCB artwork files and bill of materials. This reference design offers significant cost advantages, as it is based on a 2-layer low cost PC board.
The CRD4201-2 is a reference design for an Advanced Communications Riser (ACR) card that provides six channel CD quality analog audio outputs and an optical S/PDIF digital output. It utilizes the CS4201 audio codec and two CS4334 24-bit serial stereo DACs to achieve industry-leading audio performance that exceeds Microsoft's PC-99 and PC-2001 specifications.
The document provides detailed schematic descriptions, including the CS4201 Audio Codec configuration, analog inputs, rear and front channel outputs, and S/PDIF optical output. It also covers grounding and layout guidelines, component selection, and includes a bill of materials for the manufacturing kit CMK4201-2.
| Audio Codec | CS4201 |
|---|---|
| DACs | Two CS4334 24-bit serial stereo DACs |
| DAC Resolution | 20-bit |
| ADC Resolution | 18-bit |
| Digital Output | S/PDIF (IEC-958) optical |
| Compliance | Intel AC '97 version 2.1 |
The manufacturing kit is ordered as CMK4201-2.
Yes, the CS4201 on this card is configured as the primary AC '97 audio codec.
It exceeds Microsoft's PC-99 and PC-2001 audio performance requirements.