DRAFTv1
CS42L52
3/1/13
Low-Power, Stereo CODEC with Headphone and Speaker Amps
Stereo CODEC Class D Stereo/Mono Speaker Amplifier
High Performance Stereo ADC and DAC No External Filter Required
99 dB (ADC), 98 dB (DAC) Dyn. Range (A-wtd)
High-power Stereo Output at 10% THD+N
-88 dB THD+N 2 x 1.00 W into 8 @ 5.0 V
2 x 550 mW into 8 @ 3.7 V
Flexible Stereo Analog Input Architecture
2 x 230 mW into 8 @ 2.5 V
4:1 Analog Input MUX
Analog Input Mixing High-power Mono Output at 10% THD+N
1 x 1.90 W into 4 @ 5.0 V
Analog Passthrough with Volume Control
1 x 1.00 W into 4 @ 3.7 V
Analog Programmable Gain Amplifier (PGA)
1 x 350 mW into 4 @ 2.5 V
Programmable Automatic Level Control (ALC)
Direct Battery-powered Operation
Noise Gate for Noise Suppression
Battery Level Monitoring and Compensation
Programmable Threshold and Attack/Release
Rates 81% Efficiency at 800 mW
Phase-aligned PWM Output Reduces Idle
Dual MIC Inputs
Channel Current
Differential or Single-ended
Spread Spectrum Modulation
+16 dB to +32 dB with 1-dB step Mic Pre-
Low Quiescent Current
Amplifiers
Programmable, Low-noise MIC Bias Levels
Stereo Headphone Amplifier
Digital Signal Processing Engine
Ground-centered Outputs
Bass and Treble Tone Control, De-emphasis
No DC-Blocking Capacitors Required
Master Vol. and Independent PCM SDIN + ADC Integrated Negative Voltage Regulator
SDOUT Mix Volume Control
High-power Output at -75 dB THD+N
Soft-Ramp and Zero-Cross Transitions
2 x 23 mW Into 16 @ 1.8 V
Programmable Peak-detect and Limiter
2 x 44 mW Into 16 @ 2.5 V
Beep Generator w/Full Tone Control
(Features continued on page 2)
+1.65 V to +2.63 V +1.65 V to +2.63 V +1.60 V to +5.25 V
Analog Supply Digital Supply Battery
Summing Battery Level Monitoring & Compensation
+ Stereo/Mono
Programmable
-
Gain Amps
Full-Bridge
Pulse-Width
+
Modulator Speaker
-
(PWM)
Outputs
ALC
Beep
Class D Amps
1
Left
2
Left HP/Line
3
Mono mix,
Inputs MMuultlti-i-bbiitt
4 Volume, Mono
Output
Limiter, Bass,
ADC Swap, Mix
1 ADC
Treble Adjust
Multi-bit
Right
2
Ground-Centered
3
Inputs DAC
4 Amps
Right HP/Line
HPF
ALC
Output
Speaker/HP
+16 to +32 dB Diff./
Switch
Control Port Serial Audio Port
S.E. MIC Pre-Amps -VHP
+VHP
MIC Bias Level Shifter
+1.65 V to +2.63 V
Charge Pump
Headphone Supply
+1.65 V to +2.63 V
Selectable +1.65 V to +3.47 V Serial Audio
2
Reset
I C Control Analog Supply
Bias Voltage Interface Supply Input/Output
Copyright Cirrus Logic, Inc. 2013 MAR 13
(All Rights Reserved)
DS680F2
3/1/13
CS42L52
System Features General Description
12, 24, and 27 MHz Master Clock Support in The CS42L52 is a highly integrated, low-power stereo CO-
Addition to Typical Audio Clock Rates
DEC with headphone and Class D speaker amplifiers. The
CS42L52 offers many features suitable for low-power, porta-
High-performance 24-bit Converters
ble system applications.
Multi-bit Delta-Sigma Architecture
Very Low 64Fs Oversampling Clock Reduces The ADC input path allows independent channel control of a
number of features. Input summing amplifiers mix and select
Power Consumption
line-level and/or microphone-level inputs for each channel.
Low-power Operation
The microphone input path includes a selectable programma-
Stereo Analog Passthrough: 10 mW @ 1.8 V
ble-gain pre-amplifier stage and a low-noise MIC bias voltage
Stereo Playback: 14 mW @ 1.8 V
supply. A PGA is available for line or microphone inputs and
provides analog gain with soft-ramp and zero-cross transi-
Stereo Rec. and Playback: 23 mW @ 1.8 V
tions. The ADC also features a digital volume control with soft
Variable Power Supplies
ramp transitions. A programmable ALC and Noise Gate mon-
1.8 V to 2.5 V Digital and Analog
itor the input signals and adjust the volume levels
1.6 V to 5 V Class D Amplifier appropriately. To conserve power, the ADC may be bypassed
while still allowing full analog volume control.
1.8 V to 2.5 V Headphone Amplifier
1.8 V to 3.3 V Interface Logic The DAC output path includes a digital signal processing en-
gine with various fixed-function controls. Tone Control
Power-down Management
provides bass and treble adjustment of four selectable corner
ADC, DAC, CODEC, MIC Pre-Amplifier, PGA,
frequencies. The Digital Mixer provides independent volume
Headphone Amplifier, Speaker Amplifier
control for both the ADC output and PCM input signal paths,
as well as a master volume control. Digital Volume controls
Analog and Digital Routing/Mixes:
may be configured to change on soft-ramp transitions while
Line/Headphone Out = Analog In (ADC
the analog controls can be configured to occur on every zero
Bypassed)
crossing. The DAC also includes de-emphasis, limiting func-
Line/Headphone/Speaker
tions and a BEEP generator, delivering tones selectable
Out = ADC + Digital In
across a range of two full octaves.
Digital Out = ADC + Digital In
The stereo headphone amplifier is powered from a separate
Internal Digital Loopback
positive supply and the integrated charge pump provides a
Mono Mixes
negative supply. This allows a ground-centered, analog output
with a wide signal swing and eliminates external DC-blocking
Flexible Clocking Options
capacitors.
Master or Slave Operation
The Class D stereo speaker amplifier does not require an
High-impedance Digital Output Option (for easy
external filter and provides the high-efficiency amplification re-
MUXing between CODEC and other data
quired by power-sensitive portable applications. The speaker
sources)
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
In addition to its many features, the CS42L52 operates from a
IC Control Port Operation
low-voltage analog and digital core making it ideal for portable
systems that require extremely low power consumption in a
Headphone/Speaker Detection Input
minimal amount of space.
Pop and Click Suppression
The CS42L52 is available in a 40-pin QFN package in Com-
Applications
mercial (-40 to +85 C) grade. The CS42L52 Customer
Demonstration board is also available for device evaluation
Digital Voice Recorders, Digital Cameras, and
and implementation suggestions. Refer to Ordering Informa-
Camcorders
tion on page 81 for complete ordering information.
PDAs
Personal Media Players
Portable Game Consoles
2 DS680F2