PCM1792A 132dB SNR Highest Performance Stereo DAC (S/W Control) | TI.com

PCM1792A
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132dB SNR Highest Performance Stereo DAC (S/W Control)

 

Description

The PCM1792A is a monolithic CMOS integrated circuit that includes stereo digital-to-analog converters and support circuitry in a small 28-lead SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1792A provides balanced current outputs, allowing the user to optimize analog performance externally. The PCM1792A accepts PCM and DSD audio data formats, providing easy interfacing to audio DSP and decoder chips. The PCM1792A also interfaces with external digital filter devices (DF1704, DF1706, PMD200). Sampling rates up to 200 kHz are supported. A full set of user-programmable functions is accessible through an SPI or I²C serial control port, which supports register write and readback functions. The PCM1792A also supports the time division multiplexed command and audio (TDMCA) data format.

Features

  • 24-Bit Resolution
  • Analog Performance:
    • Dynamic Range:
      • 132 dB (9 V rms, Mono)
      • 129 dB (4.5 V rms, Stereo)
      • 127 dB (2 V rms, Stereo)
    • THD+N: 0.0004%
  • Differential Current Output: 7.8 mA p-p
  • 8× Oversampling Digital Filter:
    • Stop-Band Attenuation: –130 dB
    • Pass-Band Ripple: ±0.00001 dB
  • Sampling Frequency: 10 kHz to 200 kHz
  • System Clock: 128, 192, 256, 384, 512, or 768 fS With Autodetect
  • Accepts 16-, 20-, and 24-Bit Audio Data
  • PCM Data Formats: Standard, I²S, and Left-Justified
  • DSD Format Interface Available
  • Optional Interface to External Digital Filter or DSP Available
  • TDMCA or Serial Port (SPI/I²C)
  • User-Programmable Mode Controls:
    • Digital Attenuation: 0 dB to –120 dB, 0.5 dB/Step
    • Digital De-Emphasis
    • Digital Filter Rolloff: Sharp or Slow
    • Soft Mute
    • Zero Flag for Each Output
  • Dual Supply Operation:
    • 5-V Analog, 3.3-V Digital
  • 5-V Tolerant Digital Inputs
  • Small 28-Lead SSOP Package
  • APPLICATIONS
    • A/V Receivers
    • SACD Player
    • DVD Players
    • HDTV Receivers
    • Car Audio Systems
    • Digital Multitrack Recorders
    • Other Applications Requiring 24-Bit Audio

Parametrics

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Part number Order 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$)
PCM1792A Order now 2     0     2     127     192     SPI
I2C    
24     Advanced Segment     28SSOP: 54 mm2: 5.3 x 10.2 (SSOP | 28)     7.64 | 1ku    
PCM1794A Order now 2     0     2     127     192     H/W     24     Advanced Segment     28SSOP: 54 mm2: 5.3 x 10.2 (SSOP | 28)     7.08 | 1ku    
PCM1795 Order now 2     0     2     123     200     SPI
I2C
TDMCA    
32     Advanced Segment     28SSOP: 54 mm2: 5.3 x 10.2 (SSOP | 28)     2.90 | 1ku    
PCM1796 Order now 2     0     2     123     192     SPI
I2C    
24     Advanced Segment     28SSOP: 54 mm2: 5.3 x 10.2 (SSOP | 28)     2.78 | 1ku    
PCM1798 Order now 2     0     2     123     192     H/W     24     Advanced Segment     28SSOP: 54 mm2: 5.3 x 10.2 (SSOP | 28)     2.78 | 1ku