CS43L21 Ver la hoja de datos (PDF) - Cirrus Logic

Número de pieza

componentes Descripción

Fabricante

CS43L21

Low Power, Stereo Digital to Analog Converter

Cirrus Logic 

2. TYPICAL CONNECTION DIAGRAMS

CS43L21

+1.8 V or +2.5 V

1 µF

0.1 µF

VD

0.1 µF

0.1 µF

VA VA_HP

See Note 3

1 µF

+1.8 V or +2.5 V

Note 3:

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 .

1.5 µF ** 1 µF **

See Note 4

1.5 µF ** 1 µF **

FLYP

FLYN

VSS_HP

GND_HP

AOUTB

AOUTA

0.022 µF

51.1 Ω

470 Ω

Headphone Out

Left & Right

* *Use low ESR ceramic capacitors.

CS43L21

C

Rext

Line Level Out

Left & Right

C

See Note 2

Rext

470 Ω

Speaker Driver

Note 4 :

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.

Digital Audio

Processor

MCLK

SCLK

LRCK

SDIN

RESET

SCL/CCLK

SDA/CDIN

AD0/CS

Note 2 :

For best response to Fs/2 :

C

=

Rext + 470

4πFs(Rext × 470)

This circuitry is intended for applications where the

CS43L21 connects directly to an unbalanced output of the

device. For internal routing applications please see the

DAC Analog Output Characteristics section for loading

limitations.

2k Ω

2k Ω

+1.8 V, +2.5 V

or +3.3 V

See Note 1

Note 1:

Resistors are required for I²C

control port operation

VL

0.1 µF

FILT+

AGND

VQ

DGND

1 µF

1 µF

Figure 1. Typical Connection Diagram (Software Mode)

DS723A1

9

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