CS42L55
Ultra Low Power, Stereo CODEC w/Class H Headphone Amp
DIGITAL to ANALOG FEATURES
5 mW Stereo Playback Power Consumption
99 dB Dynamic Range (A-wtd)
-86 dB THD+N
Digital Signal Processing Engine
– Bass & Treble Tone Control, De-Emphasis
– Master Volume Control (+12 to -102 dB in
0.5 dB steps)
– Soft-Ramp & Zero-Cross Transitions
– Programmable Peak-Detect and Limiter
– Beep Generator w/Full Tone Control
ANALOG to DIGITAL FEATURES
3.5 mW Stereo Record Power Consumption
95 dB Dynamic Range (A-wtd)
-87 dB THD+N
2:1 Stereo Input MUX
Analog Programmable Gain Amplifier (PGA)
(+12 to -6 dB in 0.5 dB steps)
+20 dB Boost
Programmable Automatic Level Control (ALC)
– Noise Gate for Noise Suppression
– Programmable Threshold &
Attack/Release Rates
Independent ADC Channel Control
Digital Vol. Ctl. (0 to -96 dB in 1 dB steps)
High-Pass Filter Disable for DC Measurements
Pseudo Differential Inputs
Stereo Headphone and Line Amplifiers
Step-Down/Inverting Charge Pump
Class H Amplifier - Automatic Supply Adj.
– High Efficiency
– Low EMI
Pseudo-Differential Ground-Centered Outputs
High HP Power Output at -75 dB THD+N
– 2 x 20 mW Into 32
Ω
@1.8 V
– 2 x 20 mW Into 16
Ω
@1.8 V
1 V
RMS
Line Output @1.8 V
Analog Vol. Ctl. (+12 to -55 dB in 1 dB steps)
Analog In to Analog Out Passthrough
Pop and Click Suppression
+1.65 V to +2.71 V
Analog/Digital Supply
LDO Regulator
SYSTEM FEATURES
12 MHz USB Master Clock Input
Low Power Operation
– Stereo Anlg. Passthrough: 3.3 mW @1.8 V
– Stereo Rec. and Playback: 8.3 mW @1.8 V
Headphone Detect Input
(SYSTEM FEATURES continued on
+1.65 V to +2.71 V
Charge Pump Supply
Step-Down
+VHP
Inverting
-VHP
Left 1
Pseudo Diff.
Input
ALC
Beep
Mono mix,
Limiter, Bass,
Treble Adjust
Multi-bit
Left HP
Output
Pseudo Diff.
Input
Right 1
Left 2
Pseudo Diff.
Input
ΔΣ
ADC
Multi-bit
Attenuator,
Boost, Mix
ΔΣ
DAC
Ground-Centered
Amplifiers
Right HP
Output
Left Line
Output
Pseudo Diff.
Input
Right 2
ALC
Control Port
HPF
Serial Audio Port
Level Shifter
Right Line
Output
Headphone Detect
+1.65 V to +3.47 V
Interface Supply
I
2
C Control
I²S Serial Audio
Input/Output
Copyright
©
Cirrus Logic, Inc. 2007
(All Rights Reserved)
NOVEMBER '07
DS773F1
CIRRUS [ CIRRUS LOGIC ]
