2V RMS DIRECTPATH 112dB Audio Stereo DAC with PCM interface and fully programmable miniDSP - PCM5142

PCM5142 (ACTIVE)

2V RMS DIRECTPATH 112dB Audio Stereo DAC with PCM interface and fully programmable miniDSP

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.

Features

  • 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 System; 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

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Parametrics Compare all products in Audio DAC

 
DACs (#)
# Inputs / # Outputs
DAC SNR (Typ) (dB)
Architecture
Resolution (Bits)
Control Interface
Digital Audio Interface
Additional Features
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
Rating
PCM5142 PCM5121 PCM5122 PCM5141
2     2     2     2    
0 / 2       0 / 2       0 / 2       0 / 2      
112     106     112     106    
Delta Sigma with line driver     Delta Sigma with line driver     Delta Sigma with line driver     Delta Sigma with line driver    
32     32     32     32    
I2C
SPI
HW    
I2C
SPI
HW    
I2C
SPI
HW    
I2C
SPI
HW    
L
I2S    
L
I2S    
L
I2S    
L
I2S    
Intergrated PLL, Under Voltage protection, Intelligent Muting, Fully configurable miniDSP     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    
-25 to 85     -25 to 85     -25 to 85     -25 to 85    
28TSSOP     28TSSOP     28TSSOP     28TSSOP    
3.25 | 1ku     1.75 | 1ku     2.95 | 1ku     2.35 | 1ku    
Catalog     Catalog     Catalog     Catalog    

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