PCM514X中文资料德州仪器数据手册PDF规格书

1 Features

1• Programmable miniDSP

• 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 charge•

1.8-V or 3.3-V Fail-Safe LVCMOS Digital Inputs

• Single Supply Operation:

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

• Integrated Power-On Reset

• Small 28-pin TSSOP Package

2 Applications

• A/V Receivers

• DVD, BD Players

• HDTV Receivers

• Applications Requiring 2-VRMS Audio Output

3 Description

The PCM514x devices are a family of monolithic

CMOS-integrated circuits that include a stereo digital- to-analog converter and additional support circuitry in

a small TSSOP package. The PCM514x 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 PCM514x family integrate a fully

programmable miniDSP core, allowing developers to integrate filters, dynamic range controls, custom

interpolators, and other differentiating features to their

products.

The PCM514x 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 charge•

pump-based line drivers by supporting loads down to 1 kΩ, allowing the PCM514x to drive up to 10

products in parallel, such as LCD TV, DVDR, and AV

receivers.

The integrated PLL on the device removes the

requirement for a system clock (commonly known as

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

reducing system EMI.