CS53L30 datasheet(22/67 Pages) CIRRUS

22 / 67 page

DS992F2

CS53L30

4.4 Capture-Path Inputs

Figure 4-6. Fully Differential Mic Input Connections Example

Fig. 4-7 shows the IN1–IN4 interfaces and the related pseudodifferential connections recommended to achieve the best

common-mode rejection for single-ended internal mics.

Figure 4-7. Pseudodifferential Mic Input Connections Example

Board

Chip

MIC_BIAS_FILT

IN1–

MIC1_BIAS

IN1+

CINM

Analog

Differential

Microphone

1.0 µF

4.7 µF

GNDA

Board

Chip

GNDA

MIC_BIAS_FILT

IN1+

IN1–

MIC1_BIAS

CINM

1.0 µF

4.7 µF

CINM

1.0 µF

CINM

1.0 µF

CINM

1.0 µF

IN2+

IN2–

MIC2_BIAS

IN3+

IN3–

MIC3_BIAS

IN4+

IN4–

MIC4_BIAS

Board ground connection made

local to the microphone cartridge.

Board ground connection made

local to the microphone cartridge.

Board ground connection made

local to the microphone cartridge.

Board ground connection made

local to the microphone cartridge.

Analog

Microphone

(see

connection

diagram)

Analog

Microphone

(see

connection

diagram)

Analog

Microphone

(see

connection

diagram)

Analog

Microphone

(see

connection

diagram)

Analog Microphone Connection

Two-wire microphone connection

Rbias

Ground Ring

MICx_BIAS

INx+

INx–

Three-wire microphone connection

Ground Ring

MICx_BIAS

INx+

INx–

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