CDB42L51 Ver la hoja de datos (PDF) - Cirrus Logic

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CDB42L51

Low Power, Stereo CODEC with Headphone Amp

Cirrus Logic 

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 or DGND (1)

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

*

*

150 pF 150 pF

10 µF

1 µF

* Capacitors must be C0G or equivalent

(1) Pull-up to VL (47 kΩ for Master Mode.

Pull-down to DGND for Slave Mode.

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 =

Rext + 470

4πFs Rext × 470

Figure 2. Typical Connection Diagram (Hardware Mode)

DS679F1

11

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