CS42L51 Datasheet, PDF (11/83 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

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
Rext
Line Level Out
Left & Right
C
See Note 2
Rext
470Ω
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 =}
R_ext + 470
4πFs R_ext × 470
Figure 2. Typical Connection Diagram (Hardware Mode)
DS679A2
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