CS42L51
Low Power, Stereo CODEC with Headphone Amp
DIGITAL to ANALOG FEATURES
98 dB Dynamic Range (A-wtd)
-86 dB THD+N
Headphone Amplifier - GND Centered
– On-Chip Charge Pump Provides -VA_HP
– No DC-Blocking Capacitor Required
– 46 mW Power Into Stereo 16
Ω
@ 1.8 V
– 88 mW Power Into Stereo 16
Ω
@ 2.5 V
– -75 dB THD+N
Digital Signal Processing Engine
– Bass & Treble Tone Control, De-Emphasis
– PCM + ADC Mix w/Independent Vol Control
– Master Digital Volume Control
– Soft Ramp & Zero Cross Transitions
Beep Generator
– Tone Selections Across Two Octaves
–
–
–
Separate Volume Control
Programmable On & Off Time Intervals
Continuous, Periodic or One-Shot Beep
Selections
ANALOG to DIGITAL FEATURES
98 dB Dynamic Range (A-wtd)
-88 dB THD+N
Analog Gain Controls
– +32 dB or +16 dB MIC Pre-Amplifiers
–
Analog Programmable Gain Amplifier
(PGA)
+20 dB Digital Boost
Programmable Automatic Level Control (ALC)
– Noise Gate for Noise Suppression
–
Programmable Threshold and
Attack/Release Rates
Independent Channel Control
Digital Volume Control
High-Pass Filter Disable for DC Measurements
Stereo 3:1 Analog Input MUX
Dual MIC Inputs
– Programmable, Low Noise MIC Bias Levels
–
Differential MIC Mix for Common Mode
Noise Rejection
Programmable Peak-Detect and Limiter
Pop and Click Suppression
1.8 V to 3.3 V
1.8 V to 2.5 V
MUX
Very Low 64 Fs Oversampling Clock Reduces
Power Consumption
1.8 V to 2.5 V
Switched
Capacitor DAC
and Filter
Switched
Capacitor DAC
and Filter
1.8 V to 2.5 V
Headphone
Amp - GND
Centered
Headphone
Amp - GND
Centered
Charge
Pump
Serial Audio
Input
Hardware
Mode or I
2
C &
SPI Software
Mode
Control Data
Beep
Generator
Digital
Signal
Processing
Engine
MUX
Left HP Out
Multibit
∆Σ
Modulator
Right HP Out
PCM Serial Interface
Level Translator
ALC
Multibit
Oversampling
ADC
Multibit
Oversampling
ADC
MUX
Reset
PGA
MUX
+32 dB
Stereo Input 1
Stereo Input 2
Stereo Input 3 /
Mic Input 1 & 2
+32 dB
Serial Audio
Output
High Pass
Filters
Volume
Controls
MUX
PGA
Register
Configuration
ALC
MIC
Bias
Copyright
©
Cirrus Logic, Inc. 2006
(All Rights Reserved)
JULY '06
DS679F1
CIRRUS [ CIRRUS LOGIC ]
