Cirrus Logic CS42L55 - Manual

Copyright
© Cirrus Logic, Inc. 2007
(All Rights Reserved) http://www.cirrus.com
NOVEMBER '07
DS773F1
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
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
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
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 page 2 )
I²S Serial Audio
Input/Output
I 2 C Control
HPF
+1.65 V to +3.47 V
Interface Supply
Control Port Serial Audio Port
Level Shifter
Multi-bit
ΔΣ ADC
Beep
+1.65 V to +2.71 V
Analog/Digital Supply
Multi-bit
ΔΣ ADC
ALC
ALC
Left HP
Output
Left 1
Pseudo Diff.
Input
Multi-bit
ΔΣ DAC
LDO Regulator
Ground-Centered
Amplifiers
Inverting
Mono mix,
Limiter, Bass,
Treble Adjust
Step-Down
Attenuator,
Boost, Mix
+VHP -VHP
Right HP
Output
Left Line
Output
Right Line
Output
Left 2
Right 1
Right 2
Pseudo Diff.
Input
Pseudo Diff.
Input
Pseudo Diff.
Input
+1.65 V to +2.71 V
Charge Pump Supply
Headphone Detect
CS42L55