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PDF CRD42L51 Data sheet ( Hoja de datos )
| Número de pieza | CRD42L51 | |
| Descripción | Stereo CODEC | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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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
! Programmable Peak-Detect and Limiter
! Pop and Click Suppression
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
! 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
Serial Audio
Input
Hardware
Mode or I2C &
SPI Software
Mode
Control Data
Reset
Serial Audio
Output
Beep
Generator
Digital
Signal
Processing
Engine
MUX
Switched
Capacitor DAC
Multibit
and Filter
∆Σ Modulator
Switched
Capacitor DAC
MUX
and Filter
Headphone
Amp - GND
Centered
Headphone
Amp - GND
Centered
ALC
High Pass
Filters
Volume
Controls
Register
Configuration
ALC
Charge
Pump
Multibit
Oversampling
ADC
MUX
Multibit
Oversampling
ADC
MUX
PGA
PGA
MUX
+32 dB
+32 dB
MIC
Bias
Left HP Out
Right HP Out
Stereo Input 1
Stereo Input 2
Stereo Input 3 /
Mic Input 1 & 2
Advance Product Information
http://www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
SEPTEMBER '05
DS679A2
1 page  
CS42L51
10. ADC & DAC DIGITAL FILTERS .......................................................................................... 78
11. PARAMETER DEFINITIONS ................................................................................................ 79
12. PACKAGE DIMENSIONS ................................................................................................... 80
THERMAL CHARACTERISTICS............................................................................................ 80
13. ORDERING INFORMATION ............................................................................................... 81
14. REFERENCES ...................................................................................................................... 81
15. REVISION HISTORY ........................................................................................................... 82
DS679A2
5
5 Page 
CS42L51
+1.8V or +2.5V
1 µF
0.1 µF
0.1 µF
0.1 µF
1 µF
VD
1 µF **
1 µF **
FLYP
FLYN
VSS_HP
GND_HP
VA VA_HP
AOUTB
AOUTA
* *Use low ESR ceramic capacitors.
CS42L51
0.022 µF
51.1 Ω
See Note 4 +1.8V or +2.5V
Note 4:
Series resistance in the path of the power supplies (typically
used for added filtering) must be avoided. Any voltage drop
on VA_HP will directly impact the negative charge pump
supply (VSS_HP) and result in clipping on the audio output .
Headphone Out
Left & Right
470Ω
C
470Ω
C
Line Level Out
Left & Right
See Note 2
Rext
Rext
Digital Audio
Processor
+1.8V, 2.5 V
or +3.3V
VL
0.1 µF
MCLK
SCLK
LRCK
SDIN
SDOUT/
M/S
RESET
I²S/LJ
MCLKDIV2
DEM
VL
DGND
Speaker Driver
AIN1A
Left Analog Input 1
1800 pF * 1 µF 100 Ω 100 kΩ
1800 pF *
AIN1B
100 Ω
1 µF
100 kΩ
Right Analog Input 1
ADC_FILT+
DAC_FILT+
AGND
AFILTA
AFILTB
VQ
1 µF
**
1000 pF 1000 pF
10 µF
1 µF
* Capacitors must be C0G or equivalent
Note 2 :
This circuitry is intended for applications where the CS 42L51 connects directly to an unbalanced output of the device . For
internal routing applications please see the DAC Analog Output Characteristics section for loading limitations .
( )For best response to Fs/2 : C =
Rext + 470
4πFs Rext × 470
Figure 2. Typical Connection Diagram (Hardware Mode)
DS679A2
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CRD42L51.PDF ] | |
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