Datasheet > C-MAJORAUDIOCODECDOCUMENTATION

C-MAJORAUDIOCODECDOCUMENTATION

更新时间： 2024-11-05 23:42:35

品牌	Logo	应用领域
其他 - ETC		解码器编解码器光电二极管
页数	文件大小	规格书
1页	21K
描述
C-MAJOR AUDIO CODEC DOCUMENTATION Appnote: Audio Codec Capacitor Decoupling Performance Comparison (pdf. 19Kb. 2-ST002-AN-1099)

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

C-MAJORAUDIOCODECDOCUMENTATION 数据手册

Product Brief

SigmaTel Inc

Audio Codec Capacitor Decoupling

Performance Comparison

Integrating Mixed-Signal Solutions

Introduction

SigmaTel has consistently provided the industry’s highest performance AC’97 audio codecs for applications in PCs,

settop boxes, DVD players, PDAs, and other audio enabled equipment. Recent improvements in the designs from

SigmaTel now offer the option of significantly reducing the size and number of external decoupling capacitors used to

filter internal voltages. Audio subsystem costs are now even lower with this option for fewer and smaller external

components. The charts below indicate the expected performance levels expected for a typical PCI sound card design.

These results can also be applied to the increasingly popular motherboard designs with AC’97 audio on-board. It

should be noted that motherboards can have additional noise sources not present on sound cards. In the case of a high

noise environment, the decoupling capacitor values can be slightly increased typical sound card values to improve

performance.

CAP2 Reduction Effect

The CAP2 input on SigmaTel codecs is used to decouple the ADC reference voltage. The standard value for CAP2 is

listed as +10uF in most SigmaTel documentation. As is apparent from the chart, values down to 0.01uF have no

appreciable effect on ADC performance.

Audio Performance vs CAP2 Value

ADC THD+N 0dB

ADC -60dB DR

ADC SNR

VREF decoupled with 1.0uF and 0.1uF

10pF

100pF 1000pF 0.01uF 0.1uF

CAP2 Value

1.0uF

10uF

CAP2 and VREFcap Combined Reduction Effect

The CAP2 input on SigmaTel codecs is used to decouple the ADC reference voltage, while the VREFcap decouples the

primary internal reference voltage. The standard value for CAP2 and VREFcap is listed as +10uF in most SigmaTel

documentation. As is apparent from the chart, both capacitors can be reduced to values as small as 0.01uF with only a

minor effect on ADC performance.

Audio Performance vs CAP2/VREFcap Value

ADC THD+N 0dB

ADC SNR

ADC -60dB DR

VREF and CAP2 decoupled with same values

10pF

100pF

1000pF

0.01uF

0.1uF

1.0uF

10uF

CAP2/VREFcap Value

Capacitor Comparison Product Brief

Page - 1 of 1

10/06/99

2-ST002-AN-1099

中文翻译

下载PDF

与C-MAJORAUDIOCODECDOCUMENTATION相关器件

型号	品牌	获取价格	描述	数据表
CMAMP110	CALMIRCO	获取价格	Microphone Amplifier
CMAMP110M	CALMIRCO	获取价格	Microphone Amplifier
CMAMP110MR	CALMIRCO	获取价格	Microphone Amplifier
CMASH-4	CENTRAL	获取价格	SURFACE MOUNT SILICON SCHOTTKY DIODE
CMASH-4_10	CENTRAL	获取价格	SURFACE MOUNT SILICON SCHOTTKY DIODE
CMASH-4BK	CENTRAL	获取价格	Rectifier Diode, Schottky, 1 Element, 0.2A, 40V V(RRM), Silicon, 0.80 X 0.60 MM, 0.40 MM H
CMASH-4BKLEADFREE	CENTRAL	获取价格	Rectifier Diode, Schottky, 1 Element, 0.2A, 40V V(RRM),
CMASH-4BKPBFREE	CENTRAL	获取价格	Rectifier Diode, Schottky, 1 Element, 0.2A, 40V V(RRM),
CMASH-4PBFREE	CENTRAL	获取价格	暂无描述
CMASH-4TIN/LEAD	CENTRAL	获取价格	Rectifier Diode,

与C-MAJORAUDIOCODECDOCUMENTATION相关文章

英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

14
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
2024-11-05

12
三星深化印度制造布局，供应链本地化进程加速
2024-10-29

36
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

33

产品中心

服务支持

精选活动

关于我们

帮助中心

C-MAJORAUDIOCODECDOCUMENTATION

C-MAJORAUDIOCODECDOCUMENTATION 数据手册

与C-MAJORAUDIOCODECDOCUMENTATION相关器件

与C-MAJORAUDIOCODECDOCUMENTATION相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

C-MAJORAUDIOCODECDOCUMENTATION

C-MAJORAUDIOCODECDOCUMENTATION 数据手册

与C-MAJORAUDIOCODECDOCUMENTATION相关器件

与C-MAJORAUDIOCODECDOCUMENTATION相关文章

您还可以找

您在本页遇到什么问题？