PCM1770PWG4 datasheet(9/38 Pages) TI

Part #	PCM1770PWG4

Description	LOW-VOLTAGE AND LOW-POWER STEREO AUDIO DIGITAL-TO-ANALOG CONVERTER WITH HEADPHONE AMPLIFIER

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Manufacturer	TI [Texas Instruments]

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B0001-02

DAC

∆Σ

Audio

Interface

× 8

Digital

Filter

+

DAC

∆Σ

SPI

Port

× 8

Digital

Filter

+

VCOM

Clock Manager

Power Supply

LRCK

DATA

BCK

(FMT) MS

(AMIX) MC

(DEMP) MD

SCKI

PD

VCC

VHP

HOUTR

VCOM

HOUTL

AIN

Digital

Attenuator

Headphone

Amplifier

( ) : PCM1771

AGND

HGND

TYPICAL PERFORMANCE CURVES

Digital Filter

Digital Filter (De-Emphasis Off)

f – Frequency [ fS]

−140

−120

−100

−80

−60

−40

−20

0

1

2

3

4

G001

f – Frequency [ fS]

−0.05

−0.04

−0.03

−0.02

−0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.0

0.1

0.2

0.3

0.4

0.5

G002

PCM1770, PCM1771

SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007

FUNCTIONAL BLOCK DIAGRAM

All specifications at T

A = 25°C, VCC = VHP 2.4 V, fS = 44.1 kHz, system clock = 256 fS, 24-bit data, and RL = 16 Ω, unless

otherwise noted.

AMPLITUDE

vs

FREQUENCY

Figure 1.

Figure 2.

9

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