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PDF CS44L11 Data sheet ( Hoja de datos )
| Número de pieza | CS44L11 | |
| Descripción | Low Voltage Class-D PWM Headphone Amplifier | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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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 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
1 page  
CS44L11
PERFORMANCE SPECIFICATIONS
(Full-Scale Output Sine Wave, 997 Hz, MCLK = 12.288 MHz, Measurement Bandwidth 10 Hz to 20 kHz, unless
otherwise specified; Fs for Single-Speed Mode = 48 kHz, SCLK = 3.072 MHz; Fs for Double-Speed Mode =
96 kHz, SCLK = 6.144 MHz. Test load RL= 16 Ω, CL = 10 pF. Performance results are measured in production
using a 4700 µF capacitor on the VA_HPx pins. Results will be degraded if smaller value capacitors are used.)
Parameter
Symbol
Headphone Output Dynamic Performance for VD = VA_HPx = 2.4 V
Dynamic Range
18 to 24-Bit
16-Bit
A-Weighted
UnWeighted
A-Weighted
Unweighted
Total Harmonic Distortion + Noise
0 dBFS THD+N
-20 dBFS
-60 dBFS
Interchannel Isolation
(1 kHz)
Headphone Output Dynamic Performance for VD = VA_HPx = 1.8 V
Dynamic Range
18 to 24-Bit
16-Bit
A-Weighted
UnWeighted
A-Weighted
Unweighted
Total Harmonic Distortion + Noise
0 dB THD+N
-20 dB
-60 dB
Interchannel Isolation
PWM Headphone Output
Full-Scale Headphone Output Voltage
(1 kHz)
Headphone Output Quiescent Voltage
Interchannel Gain Mismatch
Modulation Index
Maximum Headphone Output
RMS AC-Current
VA_HPx=2.4 V
VA_HPx=1.8 V
IHP
Min
90
88
88
86
-
-
-
-
87
85
85
83
-
-
-
-
-
-
-
-
-
-
Typ
95
93
93
91
-60
-73
-33
TBD
92
90
90
88
-55
-70
-30
60
0.75 x
VA_HP
0.5 x
VA_HP
0.1
-
38
28
Max
-
-
-
-
-55
-
-
-
-
-
-
-
-50
-
-
-
-
-
-
85
-
-
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Vpp
VDC
dB
%
mA
mA
Single-Speed Mode
Parameter
Symbol Min Typ
Max
Digital Filter Response (Note 1))
Passband
(Note 2)
to -0.05 dB corner
to -0.1 dB corner
to -3 dB corner
0 - .4535
--
-
0 - .4998
Frequency Response 10 Hz to 20 kHz
(Note 3)
-.02 -
+.08
StopBand
.5465 -
-
StopBand Attenuation
(Note 4)
50 -
-
Group Delay
tgd - 9/Fs
-
Double-Speed Mode
Min Typ Max Unit
- - - Fs
0 - .4426 Fs
0 - .4984 Fs
0 - +0.11 dB
.577
55
-
-
-
4/Fs
- Fs
- dB
-s
DS640PP4
5
5 Page 
CS44L11
.8 to 2.4 V
Supply
+
100 µ F
Low ESR
Tantalum
1.0µF
0.1µF
12
VA_HPA
13
VA_H PB
7 VD
1.8 to 2.4 V
Supply
1.0µF +
5 VD
0.1µF
1.8 to 2.4 V
Supply
Digital
Audio
Source
Rpullup
Control
Logic
4
MCLK
3 SCLK
2 LRCK
1 SDIN
9
SDA
8
SCL
16
RST
CS44L11
11
HP_A
HP_B 14
100 µH
100 µH
0.22
µF
220 µF
+
+
0.22
µF 220 µF
16 Ω
Headphones
GND
10
GND
15
GND
6
* Filter component values shown are for a 16 Ω load. Please see the CDB44L11 datasheet for infor-
mation on how to calculate filter values for other loads.
Figure 4. Typical CS44L11 Connection Diagram Control Port Mode
DS640PP4
11
11 Page | ||
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| PDF Descargar | [ Datasheet CS44L11.PDF ] | |
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