Typical connection diagram, Figure 1. typical connection diagram, Cs42l52 – Cirrus Logic CS42L52 User Manual
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CS42L52
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2. TYPICAL CONNECTION DIAGRAM
Note 4
Note 3
Note 2
Note 1
1 µF
+1.8 V to +2.5 V
0.1 µF
1 µF
DGND
VL
0.1 µF
+1.8 V to +3.3 V
SCL
SDA
RESET
2 k
LRCK
Digital Audio
Processor
MCLK
SCLK
VD
MIC1-
AIN3A/MIC1A
Microphone 1
SDIN
SDOUT
CS42L52
2 k
MICBIAS
+1.8 V to +2.5 V
HP/LINE_OUTB
HP/LINE_OUTA
AIN1A
Left 1
1800 pF
1800 pF
100 k
100
AIN1B
Right 1
*
*
R
L
0.1 µF
VA
Headphone Out
Left & Right
Line Level Out
Left & Right
FLYP
FLYN
-VHPFILT
0.1 µF
51.1
0.022 µF
100 k
100
SPKR_OUTA+
SPKR_OUTA-
SPKR/HP
51.1
0.022 µF
MIC1+
AIN4A/MIC2A
MIC2+
AIN4B/MIC2B
Microphone 2
MIC2-
AIN3B/MIC1B
100 k
R
L
100 k
1 µF
1 µF
0.1 µF
+VHP
1 µF
10 µF
VQ
AGND
* Capacitors must be C0G or equivalent
150 pF
AFILTA
AFILTB
150 pF
1 µF
*
*
FILT+
1 µF
1 µF
1 µF
1 µF
* *Use low ESR ceramic capacitors.
**
**
See Note 5
SPKR_OUTB+
SPKR_OUTB-
1 µF
VP
VP
+1.6 V to
+5 V
Stereo Speakers
AIN2A
Left 2
1800 pF
1800 pF
100 k
100
AIN2B
Right 2
*
*
100 k
100
1 µF
1 µF
0.1 µF
0.1 µF
Analog
Input 1
Analog
Input 2
10 µF
Mic-Level
Inputs
47 k
Notes:
1. Recommended values for the default charge pump switching
frequency. The required capacitance follows an inverse
relationship with the charge pump’s switching frequency. When
increasing the switching frequency, the capacitance may
decrease; when lowering the switching frequency, the
capacitance must increase.
2. Larger capacitance reduces the ripple on the internal
amplifier’s supply. This may reduce the distortion at higher
output power levels.
3. Additional bulk capacitance may be added to improve PSRR
at low frequencies.
4. These capacitors serve as a charge reservoir for the internal
switched capacitor ADC modulators. They are only needed
when the PGA (Programmable Gain Amplifier) is bypassed.
5. Series resistance in the path of the power supplies must be
avoided. Any voltage drop on VHP will directly impact the
negative charge pump supply (-VHPFILT) and clip the audio
output.
6. The value of R
L
, a current-limiting resistor used with electret
condenser microphones, is dictated by the microphone
cartridge.
7. The negative terminal of the MICx inputs connects to the
ground pin of the microphone cartridge. Gain is applied only to
the positive terminal.
Note 6
Note 7
Note 7
AD0
Figure 1. Typical Connection Diagram