Datasheet > MS-2234

MS-2234

更新时间： 2024-11-15 12:46:43

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
3页	143K
描述
Anatomy of a Digital Isolator

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

MS-2234 数据手册

Technical Article

MS-2234

Optocouplers, a traditional isolator, incur the greatest

penalties, consuming high levels of power and limiting data

rates to below 1 Mbps. More power efficient and higher

speed optocouplers are available but impose a higher cost

penalty.

Anatomy of a Digital Isolator

by David Krakauer, Product Line Manager,

Analog Devices, Inc.

IDEA IN BRIEF

Digital isolators were introduced over 10 years ago to reduce

penalties associated with optocouplers. They use CMOS-

based circuitry and offer significant cost and power savings

while significantly improving data rates. They are defined by

the elements noted above. Insulating material determines

inherent isolation capability and is selected to ensure

compliance to safety standards. Structure and data transfer

method are chosen to overcome the cited penalties. All three

elements must work together to balance design targets, but

the one target that cannot be compromised and “balanced”

is the ability to meet safety regulations.

Digital isolators offer significant, compelling advantages

over optocouplers in terms of size, speed, power

consumption, ease of use, and reliability.

or years, designers of industrial, medical, and other

isolated systems had limited options when

implementing safety isolation: the only reasonable

choice was the optocoupler. Today, digital isolators offer

advantages in performance, size, cost, power efficiency, and

integration. Understanding the nature and interdependence

of three key elements of a digital isolator is important in

choosing the right digital isolator. These elements are

insulation material, their structure, and data transfer

method.

Insulation Material

Digital isolators use foundry CMOS processes and are

limited to materials commonly used in foundries.

Nonstandard materials complicate production, resulting in

poor manufacturability and higher costs. Common

insulating materials include polymers such as polyimide

(PI), which can be spun on as a thin film, and silicon dioxide

(SiO2). Both have well known insulating properties and have

been used in standard semiconductor processing for years.

Polymers have been the basis for many optocouplers, giving

them an established history as a high voltage insulator.

Designers incorporate isolation because of safety regulations

or to reduce noise from ground loops, etc. Galvanic isolation

ensures data transfer without an electrical connection or

leakage path that might create a safety hazard. Yet, isolation

imposes constraints such as delays, power consumption,

cost, and size. A digital isolator’s goal is to meet safety

requirements while minimizing incurred penalties.

Figure 1. Transformer with Thick Polyimide Insulation Where Current Pulses Create Magnetic Fields to Induce Current on the Secondary Coil (left);

Capacitor with Thin SiO2 Insulation Using Low Current Electric Fields to Couple Across Isolation Barrier (right)

www.analog.com

October 2011 | Page 1 of 3

12 3

中文翻译

下载PDF

与MS-2234相关器件

型号	品牌	获取价格	描述	数据表
MS2241	CIT	获取价格	CIT SWITCH
MS2241L3	CIT	获取价格	CIT SWITCH
MS2241L6	CIT	获取价格	CIT SWITCH
MS2241L9	CIT	获取价格	CIT SWITCH
MS2242	CIT	获取价格	CIT SWITCH
MS2242L9	CIT	获取价格	CIT SWITCH
MS2250004	AMETHERM	获取价格	Circuit Protection Thermistors
MS2250004-A	AMETHERM	获取价格	Circuit Protection Thermistors
MS2250004-B	AMETHERM	获取价格	Circuit Protection Thermistors
MS-225-1	RRE	获取价格	Cylindrical Proximity Sensor

与MS-2234相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

6
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

3
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

29
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

12

产品中心

服务支持

精选活动

关于我们

帮助中心

MS-2234

MS-2234 数据手册

与MS-2234相关器件

与MS-2234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

MS-2234

MS-2234 数据手册

与MS-2234相关器件

与MS-2234相关文章

您还可以找

您在本页遇到什么问题？