CS44L11

Low-Voltage Digital Headphone Amplifier

Overview

Description

The CS44L11 is a complete, stereo, digital-to-audio, digital power headphone amplifier. The device's architecture uses a direct-to-digital approach that maintains digital signal integrity to the final output filter. This minimizes analog interference effects that can negatively impact system performance.

The CS44L11 contains on-chip digital bass and treble boost, peak signal limiting and de-emphasis. The digital power amplifier can achieve greater than 90 percent efficiency. This efficiency leads to longer battery life for portable systems, smaller device size and power supplies.

This device is ideal for portable audio, headphone amplifiers and mobile phones.

Features

• Up to 95 dB dynamic range
• Sample rates up to 96 kHz
• 1.8 V to 2.4 V supply
• 23 mW per channel into 16 Ω at 2.4 V
• Digital tone control
• Three selectable high-pass filter and low-pass filter corner frequencies
• 12 dB boost for bass and treble -1 dB step size
• Programmable digital volume control
• 18 to -96 dB in 1 dB steps
• Peak signal soft limiting
• De-emphasis for 32 kHz, 44.1 kHz and 48 kHz
• Selectable outputs for each channel including
• Channel A: R, L, mono (L + R)/2, mute
• Channel B: R, L, mono (L + R)/2, mute
• PWM Popguard® technology
• Package: 16-pin TSSOP; lead-free assembly

Diagram