CS42L52 datasheet(10/82 Pages) CIRRUS

10 / 82 page

DS680A1

CS42L52

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

0.1 µF

+1.8 V to +3.3 V

SCL

SDA

RESET

2 k

LRCK

Digital Audio

Processor

MCLK

SCLK

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

100 k

100

AIN1B

Right 1

0.1 µF

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

1 µF

0.1 µF

+VHP

1 µF

10 µF

AGND

* Capacitors must be C0G or equivalent

150 pF

AFILTA

AFILTB

150 pF

1 µF

FILT+

1 µF

* *Use low ESR ceramic capacitors.

See Note 5

SPKR_OUTB+

SPKR_OUTB-

1 µF

+1.6 V to

+5 V

Stereo Speakers

AIN2A

Left 2

1800 pF

100 k

100

AIN2B

Right 2

100 k

100

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 RL, 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

Figure 1. Typical Connection Diagram

CS42L52 Datasheet(PDF) 10 Page - Cirrus Logic

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