This document is a preliminary product information about CS44L11 headphone amplifier released by Cirrus Logic, Inc. in 2005.
The CS44L11 is a low‑voltage Class‑D PWM headphone amplifier controller in a 16‑pin TSSOP package. It integrates digital interpolation, volume control, bass/treble boost, peak limiting and de‑emphasis, targeting portable audio, headphone amplifiers and mobile phones.
The document provides full electrical characteristics, performance specifications, switching and digital characteristics, power and thermal data, package dimensions, register descriptions and typical connection diagrams. It also includes a revision history and ordering information.
| Dynamic Range (2.4 V supply) | 90‑95 dB A‑weighted |
|---|---|
| High‑Level Input Voltage | 0.7 × VD |
| Power Supply Current (Normal operation, 2.4 V) | 14 mA |
The dynamic range is 90 dB to 95 dB A‑weighted.
It draws about 14 mA in normal operation when powered at 2.4 V.