PCM5142 | 音频 DAC | 音频转换器 | 描述与参数
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具有 PCM 接口和完全可编程 miniDSP 的 2V RMS DIRECTPATH 112dB 音频立体声 DAC
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此PCM514x器件是单片 CMOS 集成电路系列产品，它包括一个立体声数模转换器和采用薄型小外形尺寸 (TSSOP) 封装的附加支持电路。 PCM514x使用 TI 的高级分段 DAC 架构的最新一代产品来实现出色的动态性能并提升了对于时钟抖动的耐受度。
此PCM514x系列成员集成了一个完全可编程 miniDSP 内核，从而使开发人员能够将滤波器、动态范围控制、定制内插器和其它差分特性集成进他们的产品中。
PCM514x 提供了 2.1VRMS 接地中心输出，使得设计人员能够去除输出上的隔直电容器，以及与单电源线路驱动器相关的外部静噪电路。
集成的线路驱动器通过支持低至 1kΩ 的负载从而在性能上超过所有其它基于电荷泵的线路驱动器。 通过支持低至 1kΩ 的负载，PCM514x实际能够驱动多达 10 个并行产品，诸如 LCD TV，DVDR，AV 接收器。
器件上集成的 PLL 免除了对于系统时钟（通常称为主时钟）的需要，从而实现一个 3 线制 I2C 连接并减少了系统电磁干扰 (EMI)。
此外，PLL 完全可编程，使得器件成为 I2C 主时钟并将一个 DSP 串行端口驱动为一个受控端口。 PLL 也接受一个非标准时钟（最高 50MHz）作为源时钟来生成音频相关时钟（例如 24.576MHz）。
智能时钟误差和功率感应欠压保护利用一个两级静噪系统实现无爆音性能。 发生时钟误差或者系统电源故障时，器件减弱数字数据（或者已知最后的正确数据），然后将模拟电路静噪。
PCM514x系列产品提供比现有 DAC 技术最多低 20dB 的带外噪声，减少了下行放大器 / ADC 中的 EMI 和失真。（从一直使用的传统 100kHz 噪声倍频带 (OBN) 测量到 3MHz 测量）。
PCM514x 接受具有 16 至 32 位数据的工业标准音频数据格式。 支持高达 384kHz 的采样率。
可编程微型数字信号处理器 (DSP)
市场领先的低带外噪声
可选数字滤波器延迟与性能
无需隔离直流电流的电容器
集成的负电荷泵 用于采样率变化或者时钟停止的内部无爆音控制 智能静噪系统；针对带有无爆音操作 120dB 静噪信噪比 (SNR) 的软上升或下降斜波和模拟静噪 具有对于内部生成 SCK 的 BCK 基准的集成高性能音频锁相环路 (PLL)
接受 16，24，和 32 位音频数据
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# Inputs / # Outputs
Architecture
Resolution
Control Interface
Digital Audio Interface
THD+N(Typ)
Additional Features
Operating Temperature Range
Pin/Package
Approx. Price (US$)
Delta Sigma with line driver
Delta Sigma with line driver
Delta Sigma with line driver
Delta Sigma with line driver
Delta Sigma with line driver
Delta Sigma with line driver
Intergrated PLL, Under Voltage protection, Intelligent Muting, Fully configurable miniDSP
Integrated PLL
Under Voltage protection
Intelligent Muting
Intergrated PLL, Under Voltage protection, Intelligent Muting, ROM based fixed processing
Intergrated PLL, Under Voltage protection, Intelligent Muting, ROM based fixed processing
Intergrated PLL, Under Voltage protection, Intelligent Muting, Fully configurable miniDSP
Intergrated PLL
Under Voltage protection
Intelligent Muting
Fully configurable miniDSP
3.25 | 1ku
2.10 | 1ku
1.75 | 1ku
2.95 | 1ku
2.35 | 1ku
3.50 | 1ku
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2V RMS DIRECTPATH 112dB Audio Stereo DAC with PCM interface and fully programmable miniDSP
In English
日本語表示
Description
Parametrics
Related end equipment
Companion parts
Customer reviews
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 2.1VRMS 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 1kΩ. By supporting loads down to 1kΩ, the PCM514x can essentially drive up to 10 products in parallel, such as LCD TV, DVDR, 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.
In addition, the PLL is completely programmable, allowing the device to become the I2S clock master and drive a DSP serial port as a slave. The PLL also accepts a non-standard clock (up to 50MHz) as a source to generate the audio related clock (for example 24.576MHz).
Intelligent clock error and PowerSense undervoltage protection utilizes a two level mute system for pop-free performance. Upon clock error or system power failure, the device digitally attenuates the data (or last known good data), then mutes the analog circuit.
Compared with existing DAC technology, the PCM514x family offers up to 20dB lower out-of-band noise, reducing EMI and aliasing in downstream amplifiers/ADCs. (from traditional 100kHz OBN measurements all the way to 3MHz).
The PCM514x accepts industry-standard audio data formats with 16- to 32-bit data. Sample rates up to 384kHz are supported.
Programmable miniDSP Market-Leading Low Out-of-Band Noise Selectable Digital-Filter Latency and Performance
No DC Blocking Capacitors Required Integrated Negative Charge Pump Internal Pop-Free Control For Sample-Rate Changes Or Clock Halts Intelligent Muting S Soft Up or Down Ramp and Analog Mute For 120dB Mute SNR With Popless Operation Integrated High-Performance Audio PLL With BCK Reference To Generate SCK Internally Accepts 16-, 24-, And 32-Bit Audio Data
Parametrics
# Inputs / # Outputs
Architecture
Resolution
Control Interface
Digital Audio Interface
THD+N(Typ)
Additional Features
Operating Temperature Range
Pin/Package
Approx. Price (US$)
Delta Sigma with line driver
Delta Sigma with line driver
Delta Sigma with line driver
Delta Sigma with line driver
Delta Sigma with line driver
Delta Sigma with line driver
Intergrated PLL, Under Voltage protection, Intelligent Muting, Fully configurable miniDSP
Integrated PLL
Under Voltage protection
Intelligent Muting
Intergrated PLL, Under Voltage protection, Intelligent Muting, ROM based fixed processing
Intergrated PLL, Under Voltage protection, Intelligent Muting, ROM based fixed processing
Intergrated PLL, Under Voltage protection, Intelligent Muting, Fully configurable miniDSP
Intergrated PLL
Under Voltage protection
Intelligent Muting
Fully configurable miniDSP
3.25 | 1ku
2.10 | 1ku
1.75 | 1ku
2.95 | 1ku
2.35 | 1ku
3.50 | 1ku
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