PCM5122 (ACTIVE)

2V RMS DIRECTPATH 112dB Audio Stereo DAC with PCM Interface and Fixed Audio Processing

 

Description

The PCM512x 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 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 charge-pump-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.

Features

  • 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

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Parametrics Compare all products in Audio DAC

 
DAC Channels
Analog Inputs
Analog Outputs
DAC SNR (Typ) (dB)
Sampling Rate (Max) (kHz)
Control Interface
Resolution (Bits)
Architecture
Package Size: mm2:W x L (PKG)
Approx. Price (US$)
PCM5122 PCM5121 PCM5141 PCM5142
2    2    2    2   
0    0    0    0   
2    2    2    2   
112    106    106    112   
384    384    384    384   
I2C
SPI
H/W   
I2C
SPI
H/W   
I2C
SPI
H/W   
I2C
SPI
H/W   
32    32    32    32   
Delta Sigma with line driver    Delta Sigma with line driver    Delta Sigma with line driver    Delta Sigma with line driver   
28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)    28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)    28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)    28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)   
2.45 | 1ku    1.50 | 1ku    2.35 | 1ku    3.25 | 1ku   

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