CS42L51
Low Power, Stereo CODEC with Headphone Amp
DIGITAL to ANALOG FEATURES
ANALOG to DIGITAL FEATURES
! 98 dB Dynamic Range (A-wtd)
! -86 dB THD+N
! 98 dB Dynamic Range (A-wtd)
-88 dB THD+N
! Analog Gain Controls
!
! 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
–
–
+32 dB or +16 dB MIC Pre-Amplifiers
Analog Programmable Gain Amplifier
(PGA)
! +20 dB Digital Boost
! Programmable Automatic Level Control (ALC)
! Digital Signal Processing Engine
–
–
Noise Gate for Noise Suppression
Programmable Threshold and
Attack/Release Rates
–
–
–
–
Bass & Treble Tone Control, De-Emphasis
PCM + ADC Mix w/Independent Vol Control
Master Digital Volume Control
! Independent Channel Control
! Digital Volume Control
Soft Ramp & Zero Cross Transitions
!
Beep Generator
! High-Pass Filter Disable for DC Measurements
! Stereo 3:1 Analog Input MUX
! Dual MIC Inputs
–
Tone Selections Across Two Octaves
Separate Volume Control
–
–
–
Programmable On & Off Time Intervals
–
–
Programmable, Low Noise MIC Bias Levels
Differential MIC Mix for Common Mode
Noise Rejection
Continuous, Periodic or One-Shot Beep
Selections
! Programmable Peak-Detect and Limiter
! Pop and Click Suppression
! Very Low 64 Fs Oversampling Clock Reduces
Power Consumption
1.8 V to 3.3 V
1.8 V to 2.5 V
1.8 V to 2.5 V
1.8 V to 2.5 V
MUX
MUX
Headphone
Amp - GND
Centered
Switched
Capacitor DAC
and Filter
Left HP Out
Digital
Signal
Processing
Engine
Serial Audio
Input
Beep
Generator
Multibit
∆Σ Modulator
Headphone
Amp - GND
Centered
Switched
Capacitor DAC
and Filter
Right HP Out
Hardware
Mode or I2C &
SPI Software
Mode
Charge
Pump
Control Data
ALC
Reset
Stereo Input 1
Stereo Input 2
Multibit
Oversampling
ADC
MUX
MUX
PGA
PGA
+32 dB
Volume
Controls
High Pass
Filters
MUX
Serial Audio
Output
Stereo Input 3 /
Mic Input 1 & 2
Multibit
Oversampling
ADC
+32 dB
MIC
Bias
Register
Configuration
ALC
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Advance Product Information
Copyright © Cirrus Logic, Inc. 2005
SEPTEMBER '05
DS679A2
(All Rights Reserved)
http://www.cirrus.com