PCM1791A 113dB SNR 立体声 DAC（软件控制）

	PCM1791A
SNR(Typ)(dB)	113
# DACs	2
# Inputs / # Outputs	0 / 2
Sampling Rate(Max)(kHz)	192
Resolution(Bits)	24
Digital Audio Interface	L,R,I2S,TDMCA,DSD
Control Interface	SPI, I2C
Analog Supply(V)	4.5 - 5.5
Digital Supply (up to 5 V)(V)	3 - 3.6
Pd(Typ)(mW)	90
Additional Features	TDMCA/DSD Support
Operating Temperature Range(°C)	-25 to 85
Pin/Package	28SSOP

PCM1791A 描述

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.

PCM1791A 特性

• 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

PCM1791A 芯片订购指南

器件	状态	温度 (oC)	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
PCM1791ADB	ACTIVE	-25 to 85	2.50 | 1ku	SSOP (DB) | 28	47 | TUBE	PCM1791 A
PCM1791ADBG4	ACTIVE	-25 to 85	2.50 | 1ku	SSOP (DB) | 28	47 | TUBE	PCM1791 A
PCM1791ADBR	ACTIVE	-25 to 85	2.25 | 1ku	SSOP (DB) | 28	2000 | LARGE T&R	PCM1791 A
PCM1791ADBRG4	ACTIVE	-25 to 85	2.25 | 1ku	SSOP (DB) | 28	2000 | LARGE T&R	PCM1791 A

PCM1791A 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
PCM1791ADB	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		PCM1791ADB
PCM1791ADBG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	PCM1791ADBG4	PCM1791ADBG4
PCM1791ADBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		PCM1791ADBR
PCM1791ADBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	PCM1791ADBRG4	PCM1791ADBRG4

PCM1791A 应用技术支持与电子电路设计开发资源下载

1. PCM1791A 数据资料 dataSheet 下载.PDF
2. TI 德州仪器音频数模转换器产品选型与价格参考 . xls
3. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
4. 所选封装材料的热学和电学性质 (PDF 645 KB)
5. 高速数据转换 (PDF 1967 KB)
6. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
7. Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
8. Principles of Data Acquisition and Conversion (PDF 50 KB)
9. Interleaving Analog-to-Digital Converters (PDF 64 KB)
10. What Designers Should Know About Data Converter Drift (PDF 95 KB)
11. Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
12. Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)

PCM1791A 工具与软件

名称	型号	公司	工具/软件类型
音频的快速搜索选择工具	AUDIO_SELECTION_TOOL	Texas Instruments	免费评估工具
DEM-DAI1791A 评估模块	DEM-DAI1791A	Texas Instruments	开发电路板/EVM
PurePathTM Studio 图形开发环境（便携式音频）	AICPUREPATH_STUDIO	Texas Instruments	编译器/汇编器/连接器
用于数字双二阶滤波器的系数计算器	COEFFICIENT-CALC	Texas Instruments	计算实用程序
用于音频转换器的软件驱动程序	CODECDRIVERS-SW	Texas Instruments	应用软件