Normalized Frequency [

× fS]

−200

−150

−100

−50

0

50

0

8

16

24

32

G001

Frequency [

× fS]

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

0.00

0.25

0.50

0.75

1.00

G002

Antialias

LPF

BCK

VINL

Reference

VREF

VINR

Delta-Sigma

Modulator

×1/64

Decimation

Filter

with

High-Pass Filter

Power Supply

AGND

VCC

VDD

DGND

Clock and Timing Control

LRCK

DOUT

SCKI

B0004-10

Antialias

LPF

Delta-Sigma

Modulator

Serial

Interface

Mode/

Format

Control

FMT

MD1

MD0

PCM1808-Q1

SLES265A – MARCH 2011 – REVISED AUGUST 2012

www.ti.com

Functional Block Diagram

TYPICAL PERFORMANCE CURVES OF INTERNAL FILTERS

All specifications at TA = 25°C, VCC = 5 V, VDD = 3.3 V, master mode, fS = 48 kHz, system clock = 512 fS, 24-bit data, unless

otherwise noted.

DECIMATION FILTER FREQUENCY RESPONSE

OVERALL CHARACTERISTICS

STOP-BAND ATTENUATION CHARACTERISTICS

Figure 1.

Figure 2.

6

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