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CDB42L51 Datasheet(PDF) 10 Page - Cirrus Logic

Part # CDB42L51
Description  Low Power, Stereo CODEC with Headphone Amp
Download  88 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CDB42L51 Datasheet(HTML) 10 Page - Cirrus Logic

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10
DS679F1
CS42L51
2. TYPICAL CONNECTION DIAGRAMS
1 µF
+1.8 V or +2.5 V
1 µF
VQ
DAC_FILT+
0.1 µF
1 µF
DGND
VL
0.1 µF
+1.8 V, +2.5 V
or +3.3 V
SCL/CCLK
SDA/CDIN
RESET
2 k
See Note 1
LRCK
AGND
AD0/CS
MCLK
SCLK
0.1 µF
VA_HP
VD
* Capacitors must be C0G or equivalent
150 pF
AFILTA
AFILTB
MICIN1
AIN3A
Microphone Input
150 pF
SDIN
SDOUT
CS42L51
2 k
1 µF
BIAS2
AIN3B/MICIN2
**
+1.8 V or +2.5 V
AOUTB
AOUTA
470
470
C
C
Rext
Rext
See Note 2
AIN1A
Left Analog Input 1
1800 pF
1800 pF
100 k
100
AIN1B
Right Analog Input 1
*
*
Note 1:
Resistors are required for I²C
control port operation
For best response to Fs/2 :
()
470
4
470
×
+
=
ext
ext
R
Fs
R
C
π
This circuitry is intended for applications where the
CS42L51 connects directly to an unbalanced output of the
device. For internal routing applications please see the
DAC Analog Output Characteristics section for loading
limitations.
Note 2 :
RL
See Note 3
Note 3: The value of RL is dictated
by the microphone cartridge.
Digital Audio
Processor
0.1 µF
VA
Headphone Out
Left & Right
Line Level Out
Left & Right
Speaker Driver
AIN2A
Left Analog Input 2
1800 pF
1800 pF
AIN2B
BIAS1
Right Analog Input 2
*
*
FLYP
FLYN
VSS_HP
GND_HP
1 µF
10 µF
ADC_FILT+
Microphone Bias
1 µF
1 µF
1 µF
1 µF
1 µF
0.1 µF
51.1
0.022 µF
100 k
100
100
100
100 k
100 k
100 k
1 µF
**
**
* *Use low ESR ceramic capacitors.
See Note 4
Note 4:
Series resistance in the path of the power supplies 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 .
1.5 µF
1.5 µF
See Note 5
Note 5 :
Larger capacitors, such as 1.5 µF, improves the charge
pump performance (and subsequent THD +N) at the full
scale output power achieved with gain (G) settings
greater than default.
**
**
Figure 1. Typical Connection Diagram (Software Mode)


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