CRD42L51 Cirrus Logic Inc, CRD42L51 Datasheet - Page 10

• Manufacturer Part Number: CRD42L51
• Description: Ref Bd Low-voltage Stereo Codec
• Manufacturer: Cirrus Logic Inc

10
2. TYPICAL CONNECTION DIAGRAMS
+1.8 V, +2.5 V
or +3.3 V
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.
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 :
For best response to Fs/2 :
* *Use low ESR ceramic capacitors.
+1.8 V or +2.5 V
Note 1:
Resistors are required for I²C
control port operation
C
=
4
Digital Audio
π
Processor
Fs
R
ext
(
R
+
ext
470
×
See Note 1
See Note 5
1.5 µF
470
1.5 µF
2 k
)
Ω
**
**
1 µF
1 µF
1 µF
2 k
Ω
Figure 1. Typical Connection Diagram (Software Mode)
0.1 µF
**
**
0.1 µF
GND_HP
FLYP
FLYN
VSS_HP
MCLK
SCLK
LRCK
SDIN
SDOUT
RESET
SCL/CCLK
SDA/CDIN
AD0/CS
VL
VD
CS42L51
DGND
VA
AIN3B/MICIN2
ADC_FILT+
DAC_FILT+
0.1 µF
VA_HP
AOUTA
AOUTB
AFILTA
AFILTB
MICIN1
AIN1A
AIN1B
AIN2A
AIN2B
BIAS1
AGND
AIN3A
BIAS2
VQ
0.1 µF
1800 pF
1800 pF
1800 pF
1800 pF
*
* Capacitors must be C0G or equivalent
1 µF
0.022 µF
150 pF
51.1 Ω
0.1 µF
*
*
*
*
1 µF
*
1 µF
1 µF
1 µF
1 µF
See Note 4
100 kΩ
150 pF
100 Ω
1 µF
100 Ω
100 Ω
100 Ω
470
470
Note 3: The value of R
by the microphone cartridge.
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 .
R
Ω
L
Ω
100 kΩ
100 kΩ
See Note 3
100 kΩ
100 kΩ
10 µF
1 µF
C
C
+1.8 V or +2.5 V
Speaker Driver
Microphone Input
Line Level Out
Left & Right
See Note 2
Left Analog Input 1
Right Analog Input 1
Left Analog Input 2
Right Analog Input 2
Microphone Bias
Headphone Out
Left & Right
L
is dictated
CS42L51
DS679F1
R
R
ext
ext