cs42l52 Cirrus Logic, Inc., cs42l52 Datasheet - Page 10

• Manufacturer Part Number: cs42l52
• Description: Low-power, Stereo Codec W/ Headphone & Speaker Amps
• Manufacturer: Cirrus Logic, Inc.

10
2. TYPICAL CONNECTION DIAGRAM
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
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.
+1.8 V to +3.3 V
L
, a current-limiting resistor used with electret
+1.8 V to +2.5 V
* *Use low ESR ceramic capacitors.
Digital Audio
Processor
2 k
Ω
1 µF
1 µF
1 µF
2 k
Figure 1. Typical Connection Diagram
Note 1
Note 2
Ω
0.1 µF
**
**
0.1 µF
MCLK
SDIN
SDOUT
SCL
SDA
FLYP
FLYN
-VHPFILT
SCLK
LRCK
RESET
VL
VD
CS42L52
5/13/08
DGND
VA
HP/LINE_OUTB
HP/LINE_OUTA
0.1 µF
SPKR_OUTA+
SPKR_OUTA-
SPKR_OUTB+
SPKR_OUTB-
+VHP
AIN4B/MIC2B
AIN3B/MIC1B
AIN3A/MIC1A
AIN4A/MIC2A
SPKR/HP
MICBIAS
AFILTA
AFILTB
AIN2A
AIN2B
AGND
AIN1A
AIN1B
MIC2+
MIC1+
MIC1-
MIC2-
FILT+
0.1 µF
VQ
VP
VP
0.022 µF
0.022 µF
*
1800 pF
1800 pF
1800 pF
1800 pF
1 µF
* Capacitors must be C0G or equivalent
0.1 µF
Note 4
0.1 µF
0.1 µF
150 pF
51.1 Ω
51.1 Ω
*
*
*
*
1 µF
1 µF
1 µF
1 µF
47 kΩ
*
100 Ω
100 Ω
100 Ω
100 Ω
150 pF
See Note 5
10 µF
100 kΩ
100 kΩ
Note 7
Note 7
+1.6 V to
Note 3
+1.8 V to +2.5 V
1 µF
1 µF
1 µF
1 µF
+5 V
R
R
1 µF
L
L
Note 6
100 kΩ
100 kΩ
100 kΩ
100 kΩ
Stereo Speakers
10 µF
Headphone Out
Left & Right
Right 2
Right 1
Left 2
Left 1
Line Level Out
Left & Right
Microphone 1
Microphone 2
Analog
Input 1
Analog
Input 2
Mic-Level
Inputs
CS42L52
DS680F1