Confidential Draft
CS43L22
3/4/10
Low Power, Stereo DAC w/Headphone & Speaker Amps
Class D Stereo/Mono Speaker Amplifier
FEATURES
No External Filter Required
98 dB Dynamic Range (A-wtd)
88 dB THD+N
High Stereo Output Power at 10% THD+N
Headphone Amplifier - GND Centered
2 x 1.00 W into 8 @ 5.0 V
No DC-Blocking Capacitors Required
2 x 550 mW into 8 @ 3.7 V
Integrated Negative Voltage Regulator
2 x 230 mW into 8 @ 2.5 V
2 x 23 mW into Stereo 16 @ 1.8 V
2 x 44 mW into Stereo 16 @ 2.5V
High Mono Output Power at 10% THD+N
Stereo Analog Input Passthrough Architecture
1 x 1.90 W into 4 @ 5.0 V
Analog Input Mixing
1 x 1.00 W into 4 @ 3.7 V
Analog Passthrough with Volume Control
1 x 350 mW into 4 @ 2.5 V
Digital Signal Processing Engine
Bass & Treble Tone Control, De-Emphasis
Direct Battery Powered Operation
PCM Input w/Independent Vol Control
Battery Level Monitoring & Compensation
Master Digital Volume Control and Limiter
Soft-Ramp & Zero-Cross Transitions
81% Efficiency at 800 mW
Programmable Peak-Detect and Limiter
Beep Generator w/Full Tone Control
Phase-Aligned PWM Output Reduces Idle
Tone Selections Across Two Octaves
Channel Current
Separate Volume Control
Spread Spectrum Modulation
Programmable On and Off Time Intervals
Continuous, Periodic, One-Shot Beep
Low Quiescent Current
Selections
+1.65 V to +3.47 V
+1.60 V to +5.25 V
Interface Supply
Battery
Battery Level Monitoring & Compensation
Stereo/Mono
+
-
Full-Bridge
Pulse-Width +
Speaker
-
Modulator
Outputs
Serial
Audio
Class D Amps
Input
Digital Volume,
Left HP/Line
Mono Mix, Multi-bit
Output
Limiter, Bass,
DAC
Treble Adjust
Right HP/Line
Reset
Output
Ground-Centered
Beep
Amps
Generator
Summing
Speaker/HP
Amplifiers
IC
Switch
-VHP +VHP
Control
+1.65 V to +2.63 V
Charge Pump
Headphone Supply
+1.65 V to +2.63 V
+1.65 V to +2.63 V
1 2 3 4
1 2 3 4
Analog Supply
Digital Supply
Left Right
Inputs Inputs
MARCH '10
Copyright Cirrus Logic, Inc. 2010
(All Rights Reserved)
Confidential Draft
3/4/10
CS43L22
System Features General Description
12, 24, and 27 MHz Master Clock Support in The CS43L22 is a highly integrated, low power stereo DAC
Addition to Typical Audio Clock Rates
with headphone and ClassD speaker amplifiers. The
CS43L22 offers many features suitable for low power, porta-
High Performance 24-bit Converters
ble system applications.
Multi-bit DeltaSigma Architecture
Very Low 64Fs Oversampling Clock Reduces The DAC output path includes a digital signal processing en-
gine with various fixed function controls. Tone Control
Power Consumption
provides bass and treble adjustment of four selectable corner
Low Power Operation
frequencies. Digital Volume controls may be configured to
Stereo Analog Passthrough: 10 mW @ 1.8 V
change on soft ramp transitions while the analog controls can
Stereo Playback: 14 mW @ 1.8 V
be configured to occur on every zero crossing. The DAC also
includes de-emphasis, limiting functions and a BEEP genera-
Variable Power Supplies
tor delivering tones selectable across a range of two full
1.8 V to 2.5 V Digital & Analog
octaves.
1.6 V to 5 V Class D Amplifier
The stereo headphone amplifier is powered from a separate
1.8 V to 2.5 V Headphone Amplifier
positive supply and the integrated charge pump provides a
1.8 V to 3.3 V Interface Logic
negative supply. This allows a ground-centered analog output
with a wide signal swing and eliminates the need for external
Power Down Management
DC-blocking capacitors.
DAC, Passthrough Amplifier, Headphone
Amplifier, Speaker Amplifier
The Class D stereo speaker amplifier does not require an
external filter and provides the high efficiency amplification re-
Flexible Clocking Options
quired by power sensitive portable applications. The speaker
Master or Slave Operation
amplifier may be powered directly from a battery while the in-
Quarter-Speed Mode - (i.e. allows 8 kHz Fs
ternal DC supply monitoring and compensation provides a
while maintaining a flat noise floor up to 16 kHz)
constant gain level as the batterys voltage decays.
4 kHz to 96 kHz Sample Rates
The CS43L22 accommodates analog routing of the analog in-
TM
IC Control Port Operation put signal directly to the headphone amplifier. This feature is
useful in applications that utilize an FM tuner where audio re-
Headphone/Speaker Detection Input
covered over-the-air must be transmitted to the headphone
Pop and Click Suppression
amplifier directly.
Pin-Compatible w/CS42L52
In addition to its many features, the CS43L22 operates from a
Applications
low voltage analog and digital core making it ideal for portable
systems that require extremely low power consumption in a
PDAs
minimal amount of space.
Personal Media Players
The CS43L22 is available in a 40-pin QFN package in Com-
Portable Game Consoles
mercial (-40 to +85 C) grade. The CS43L22 Customer
Demonstration board is also available for device evaluation
and implementation suggestions. Please refer to Ordering In-
formation on page 66 for complete ordering information.
2 DS792F2