The PCM1791A 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 PCM1791A provides balanced voltage outputs, allowing the user to optimize analog performance externally. The PCM1791A accepts PCM and DSD audio data formats, providing easy interfacing to audio DSP and decoder chips. The PCM1791A also accepts interface to 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 PCM1791A also supports the time-division-multiplexed command and audio (TDMCA) data format.

• 24-Bit Resolution
• Analog Performance:
  • Dynamic Range: 113 dB
  • THD+N: 0.001%
  • Full-Scale Output: 2.1 V RMS (at Postamp)
• Differential Voltage Output: 3.2 Vp-p
• 8× Oversampling Digital Filter:
  • Stop-Band Attenuation: –82 dB
  • Pass-Band Ripple: ±0.002 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/PCM Format
  • Zero Detect Mute/PCM Format
  • Zero Flag for Each Output/PCM and DSD Formats
• Dual Supply Operation:
  • 5-V Analog, 3.3-V Digital
• 5-V Tolerant Digital Inputs
• Small 28-Lead SSOP Package
• APPLICATIONS
  • A/V Receivers
  • DVD Movie Players
  • SACD Player
  • HDTV Receivers
  • Car Audio Systems
  • Digital Multitrack Recorders
  • Other Applications Requiring 24-Bit Audio

• Number of DAC channels (#)
• 2
• Analog inputs
• 0
• Analog outputs
• 2
• DAC SNR (Typ) (dB)
• 113
• Sampling rate (Max) (kHz)
• 192
• Control interface
• SPI, I2C
• Resolution (Bits)
• 24
• Architecture
• Advanced Segment

PCM1791A的完整型号有：PCM1791ADB、PCM1791ADBR，以下是这些产品的关键参数及官网采购报价：

PCM1791ADB，工作温度：-25 to 85，封装：SSOP (DB)-28，包装数量MPQ：47个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网PCM1791ADB的批量USD价格：3.323（1000+）

PCM1791ADBR，工作温度：-25 to 85，封装：SSOP (DB)-28，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网PCM1791ADBR的批量USD价格：2.769（1000+）

PCM179XSW-LINUX — 适用于 PCM179X 的 Linux 驱动程序

Linux 驱动程序支持用于 PCM179x 器件系列的音频数模转换器 (DAC)，通过 I2C 和 SPI 以及寄存器与 Linux 内核的 ASOC 框架进行通信。
Linux 主线状态

Linux 主线中提供：是
可通过 git.ti.com 获取：不适用

Linux 源文件

与该器件关联的文件为：

sound/soc/codecs/pcm179x.c

sound/soc/codecs/pcm179x-i2c.c

sound/soc/codecs/pcm179x-spi.c

Documentation/devicetree/bindings/sound/pcm179x.txt

源文件

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PCM1791EVM - Graphical User Interface (GUI) Software

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