CS44L11 Datasheet, PDF (1/34 Pages) Cirrus Logic – Low Voltage Class-D PWM Headphone Amplifier

CS44L11
Low Voltage Class-D PWM Headphone Amplifier
Features
 Up to 95 dB Dynamic Range
 1.8 V to 2.4 V Analog and Digital Supplies
 Sample Rates up to 96 kHz
 Digital Tone Control
– 3 Selectable HPF and LPF 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^®
 23 mW/Channel into 16 Ω @ 2.4 V
Description
The CS44L11 is a complete stereo digital-to-PWM
Class-D audio amplifier system controller including in-
terpolation, volume control, and a headphone amplifier
in a 16-pin TSSOP package.
The CS44L11 architecture uses a direct-to-digital ap-
proach that maintains digital signal integrity to the final
output filter. This minimizes analog interference effects
that can negatively affect system performance.
The CS44L11 contains on-chip digital bass and treble
boost, peak signal limiting, and de-emphasis. The PWM
amplifier can achieve greater than 90% efficiency. This
efficiency leads to longer battery life for portable sys-
tems, smaller device package, less heat sink
requirements, and smaller power supplies.
The CS44L11 is ideal for portable audio, headphone
amplifiers, and mobile phones.
ORDERING INFORMATION
CS44L11-CZZ, Lead Free -10 to 70 °C 16-pin TSSOP
SDIN
SCLK
LRCK
SCL/DIF0
SDA/DEM
Control Port
Multibit ∆Σ
Modulator with
Correction
PWM
Conversion
Serial
Audio
Port
Digital Volume
Control,
Bass/Treble
Boost,
Compression
Limiting,
De-emphasis
Interpolation
Input Sampling Rate
LRCLK/MCLK Ratio
Multibit ∆Σ
Modulator with
Correction
PWM
Conversion
Level
Shifter
Level
Shifter
VA_HPA
HP_A
GND_HPA
VA_HPB
HP_B
GND_HPB
RST
Preliminary Product Information
http://www.cirrus.com
MCLK
VD
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
JULY '05
DS640PP4