®

PCM3002/3003

12

BLOCK DIAGRAM

FIGURE 1. Analog Front-End (Single-Channel).

30k

Ω

V

1

21

4

5

V

COM

V

V

Delta-Sigma

Modulator

(+)

(–)

V

REF

+

+

1.0µF

4.7µF

+

4.7µF

+

4.7µF

Interpolation

Filter

8X Oversampling

Interpolation

Filter

8X Oversampling

Multi-Level

Delta-Sigma

Modulator

Multi-Level

Delta-Sigma

Modulator

Clock

Reset and

Power Down

SYSCLK

AGND2

V

AGND1

V

Reference

Mode

Control

Interface

Serial Data

Interface

DOUT

BCKIN

LRCIN

DIN

V

V

V

COM

V

V

V

V

Power Supply

DGND

V

DD

Analog

Low-Pass

Filter

Analog

Low-Pass

Filter

Decimation

and

High Pass Filter

Delta-Sigma

Modulator

(–)

(+)

Analog

Front-End

Circuit

Decimation

and

High Pass Filter

Delta-Sigma

Modulator

ADC

DAC

(+)

(–)

Analog

Front-End

Circuit

NOTES: (1) MC, MD, ML, RST, and ZFLG are for PCM3002 only. (2) DEM0, DEM1, 20BIT, PDAD, and PDDA are for PCM3003 only.