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Cirrus Logic

CS44L11 Datasheet Preview

CS44L11 Datasheet

Low Voltage Class-D PWM Headphone Amplifier

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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 @ 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




Cirrus Logic

CS44L11 Datasheet Preview

CS44L11 Datasheet

Low Voltage Class-D PWM Headphone Amplifier

No Preview Available !

CS44L11
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS ..................................................................................... 4
PERFORMANCE SPECIFICATIONS.................................................................................................... 5
SWITCHING CHARACTERISTICS ....................................................................................................... 8
SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMAT ............................................... 9
2. TYPICAL CONNECTION DIAGRAMS ................................................................................................ 10
3. REGISTER QUICK REFERENCE ................................................................................................... 12
4. REGISTER DESCRIPTIONS ............................................................................................................... 13
4.1 Power and Muting Control (address 02h) ..................................................................................... 13
4.1.1 Soft Ramp and Zero Cross Control (SZC) ....................................................................... 13
4.1.2 Power Down (PDN) ......................................................................................................... 13
4.1.3 Float Output (FLT) .......................................................................................................... 13
4.1.4 Ramp-Up Bypass (RUPBYP) ........................................................................................... 14
4.1.5 Ramp-Down Bypass (RDNBYP) ...................................................................................... 14
4.2 Channel A Volume Control (address 03h) (VOLA) ....................................................................... 14
4.3 Channel B Volume Control (address 04h) (VOLB) ....................................................................... 14
4.4 Tone Control (address 05h) .......................................................................................................... 15
4.4.1 Bass Boost Level (BB) ..................................................................................................... 15
4.4.2 Treble Boost Level (TB) ................................................................................................... 15
4.5 Mode Control 1 (address 06h) ...................................................................................................... 15
4.5.1 Bass Boost Corner Frequency (BBCF) ............................................................................ 16
4.5.2 Treble Boost Corner Frequency (TBCF) .......................................................................... 16
4.5.3 Tone Control Mode (TC) .................................................................................................. 17
4.5.4 Tone Control Enable (TC_EN) ........................................................................................ 17
4.5.5 Peak Signal Limiter Enable (LIM_EN) ............................................................................. 17
4.6 Limiter Attack Rate (address 07h) (ARATE) ................................................................................. 18
4.7 Limiter Release Rate (address 08h) (RRATE) ........................................................................ 18
4.8 Volume and Mixing Control (address 09h) ................................................................................... 19
4.8.1 Ramp Speed (RMP_SP) .................................................................................................. 19
4.8.2 ATAPI Channel Mixing and Muting (ATAPI) .................................................................... 19
4.9 Mode Control 2 (address 0Ah) ..................................................................................................... 20
4.9.1 Master Clock Divide Enable (MCLKDIV) ......................................................................... 20
4.9.2 Clock Divide (CLKDIV) ..................................................................................................... 20
4.9.3 Double-Speed Mode (DBS) ............................................................................................. 21
4.9.4 Frequency Shift (FRQSFT) .............................................................................................. 21
4.9.5 De-Emphasis Control (DEM) .......................................................................................... 22
4.10 Mode Control 3 (address 0Bh) ................................................................................................... 23
4.10.1 Digital Interface Formats (DIF) ....................................................................................... 23
4.10.2 Channel A Volume = Channel B Volume (A=B) ............................................................. 23
4.10.3 Volume Control Bypass (VCBYP) .................................................................................. 23
4.10.4 Control Port Enable (CP_EN) ........................................................................................ 23
4.10.5 Freeze (FREEZE) .......................................................................................................... 24
4.11 Revision Indicator (address 0Ch)[Read Only] ........................................................................... 24
5. PIN DESCRIPTION .............................................................................................................................. 25
6. APPLICATIONS ................................................................................................................................. 26
6.1 Grounding and Power Supply Decoupling .................................................................................... 26
6.2 Clock Modes ................................................................................................................................. 26
6.3 De-Emphasis ................................................................................................................................ 26
6.4 PWM PopGuard Transient Control ............................................................................................... 26
6.5 Recommended Power-Up Sequence ........................................................................................... 27
6.5.1 Stand-Alone Mode ........................................................................................................... 27
6.5.2 Control Port Mode ............................................................................................................ 27
7. CONTROL PORT INTERFACE ........................................................................................................... 28
2 DS640PP4


Part Number CS44L11
Description Low Voltage Class-D PWM Headphone Amplifier
Maker Cirrus Logic
Total Page 30 Pages
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