PCM5122PW.A中文资料德州仪器数据手册PDF规格书

1 Features

1• Register-Selectable Audio-Processing Functions

up to 48-kHz fS

– Dynamic Range Control (DRC)

– Equalization (EQ)

– Filtering

• DAC Functionality to 384-kHz fS

• Market-Leading Low Out-of-Band Noise

• Selectable Digital-Filter Latency and Performance

• No DC-Blocking Capacitors Required

• Integrated Negative Charge Pump

• Intelligent Muting System; Soft Up or Down Ramp

and Analog Mute for 120-dB Mute SNR

• Integrated High-Performance Audio PLL With

BCK Reference to Generate SCK Internally

• Accepts 16-, 20-, 24-, and 32-Bit Audio Data

• PCM Data Formats: I2S, Left-Justified, Right-

Justified, TDM / DSP

• SPI or I2C Control

• Software or Hardware Configuration

• Automatic Power-Save Mode When LRCK and

BCK are Deactivated

• 1.8-V or 3.3-V Failsafe LVCMOS Digital Inputs

• Single Supply Operation:

– 3.3-V Analog, 1.8-V or 3.3-V Digital

• Integrated Power-On Reset

• Small28-Pin Package

2 Applications

• A/V Receivers

• DVD, BD Players

• HDTV Receivers

• Applications Requiring 2-VRMS Audio Output

3 Description

The PCM512x devices are a family of monolithic

CMOS-integrated circuits that include a stereo digitalto-

analog converter and additional support circuitry in

a small TSSOP package. The PCM512x uses the

latest generation of TI’s advanced segment-DAC

architecture to achieve excellent dynamic

performance and improved tolerance to clock jitter.

Members of the PCM512x family integrate preset

audio processing functions with programmable

coefficients, allowing developers to change the

characteristics of the interpolation filter, speaker EQ,

dynamic range controls, and average volume control

in their products.

The PCM512x provides 2.1-VRMS ground-centered

outputs, allowing designers to eliminate DC-blocking

capacitors on the output, as well as external muting

circuits traditionally associated with single supply line

drivers.

The integrated line driver surpasses all other chargepump-

based line drivers by supporting loads down to

1 kΩ. By supporting loads down to 1 kΩ, the

PCM512x can essentially drive up to 10 products in

parallel (LCD TV, DVDR, AV receivers, and so forth).

The integrated PLL on the device removes the

requirement for a system clock (commonly known as

master clock), allowing a 3-wire I2S connection, along

with reducing system EMI.