PCM1753 datasheet(12/41 Pages) TI2

12 / 41 page

Power Supply

Multilevel

Delta-Sigma

Modulator

VOUTL

4x/8x

Oversampling

Digital

Filter

and

Function

Control

Audio

Serial

Port

BCK

LRCK

DATA

Serial

Control

Port

Zero Detect

TEST

SCK

System

Clock

Manager

MUTE

FMT

Output Amp

and

Low-Pass Filter

DEMP

DAC

VCOM

System Clock

Output Amp

and

Low-Pass Filter

DAC

VOUTR

Enhanced

PCM1753, PCM1754, PCM1755

SLES092E – APRIL 2003 – REVISED JULY 2019

www.ti.com

Product Folder Links: PCM1753 PCM1754 PCM1755

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8 Detailed Description

8.1 Overview

The PCM175x devices are stereo digital-to-analog converters (DACs) based on TI's enhanced delta-sigma

architecture which employ 4th-order noise shaping and 8-level amplitude quantization to achieve excellent

dynamic performance and improved clock jitter tolerance. The PCM175x devices easily interface with audio DSP

and decoder chips because of the devices' support of industry-standard audio data formats with 16- and 24-bit

data. The PCM175x devices can be controlled in a hardware mode, or a full set of user-programmable functions

is accessible through a three-wire serial control port, which supports register-write functions.

8.2 Functional Block Diagram

8.3 Feature Description

8.3.1 System Clock and Reset Functions

8.3.1.1 System Clock Input

The PCM175x devices require a system clock for operating the digital interpolation filters and multilevel delta-

sigma modulators. The system clock is applied at the SCK input (pin 16). Table 1 lists examples of system clock

frequencies for common audio sampling rates.

Figure 20 shows and the System Clock Input Timing table lists he timing requirements for the system clock input.

For optimal performance, use a clock source with low phase-jitter and noise. TI's PLL170x family of multiclock

generators is an excellent choice for providing the PCM175x system clock.

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