This document is an introduction to Cirrus Logic CS4202 audio codec.
The CS4202 audio codec is designed for PC multimedia systems and complies with the AC ’97 2.2 standard. It integrates a high‑performance headphone amplifier, microphone pre‑amplifier, S/PDIF digital output, and on‑chip PLL for external clock sources. The device supports six‑channel audio playback and simultaneous S/PDIF output, making it suitable for desktop, portable, and entertainment PCs.
The datasheet provides full electrical characteristics, register maps, pin descriptions, and package dimensions. Key specifications include 20‑bit stereo DAC, 18‑bit stereo ADC, dynamic range up to 95 dBFS, and power‑down modes that reduce consumption to 1.25 W. Mechanical details list a 48‑pin TQFP package measuring 9 × 9 × 1.4 mm.
| Full Scale Input Voltage (Line Inputs) | 0.91 – 1.00 V rms (typical 1.00 V) |
|---|---|
| Frequency Response (Analog) | 20 – 20 000 Hz, ±0.25 dB |
| Dynamic Range (Stereo Analog Inputs to LINE_OUT) | 90 – 95 dBFS |
| Package Type | 48‑pin TQFP, 9 × 9 × 1.4 mm |
The CS4202 is supplied in a 48‑pin lead‑free TQFP package measuring 9 × 9 × 1.4 mm.
The DAC provides a dynamic range of 85 – 90 dBFS.