Datasheet > 20-313140

20-313140

更新时间： 2024-02-03 16:56:41

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	568K
描述
Evaluation Board User Guide

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

20-313140 数据手册

UG-317

Evaluation Board User Guide

TERMINATION AND PULL-UP/PULL-DOWN

RESISTORS

DECOUPLING AND RESERVOIR CAPACITORS

The evaluation board uses the following decoupling and

reservoir capacitors:

The evaluation board includes the RT and RT1 footprints for

fitting termination resistors between the A and B receiver inputs

and the Y and Z driver outputs. By default, the board is fitted

with a 120 Ω resistor, RT, between A and B. This resistor should

be removed if the board is connected to a bus that is already

terminated at both ends. For more information about proper

termination, see the AN-960 Application Note, RS-485/RS-422

Circuit Implementation Guide.

•

On the logic side of the board, the C1 and C2 capacitors

should be 10 μF and 100 nF ceramic capacitors, respectively,

and the C4 and C6 capacitors should be 10 nF and 100 nF

ceramic capacitors, respectively.

•

On the bus side of the board, the C5 and C7 capacitors

should be 10 nF and 100 nF, respectively, and the C8 and

C9 capacitors should be 100 nF and 10 μF, respectively.

Although the ADM2682E/ADM2687E have a built-in receiver

fail-safe for the bus idle condition, there are footprints on the

evaluation board for fitting the R3 and R1 pull-up resistors to

VISO on A and Y, as well as the R4 and R2 pull-down resistors

to GND on B and Z. These resistors can be fitted if the user is

connecting to other parts that require such external biasing resis-

tors on the bus. The exact value required for a 200 mV minimum

differential voltage in the bus idle condition depends on the supply

voltage (for example, 960 ꢀ for 3.3 V and 1440 ꢀ for 5 V).

BOARD INTERNAL LAYER THICKNESS

The ADM2682E/ADM2687E evaluation board consists of

six layers with four internal layers. The spacing between the

internal board layers was chosen as specified in Table 2 to

maximize the stitching capacitance on the board.

Table 2. Spacing Between Layers of the Evaluation Board

Layers

1 to 2

2 to 3

3 to 4

4 to 5

5 to 6

Thickness of Space Between Layers (mm)

0.1016

0.2032

0.1016

For more information about the bus idle fail-safe, see the AN-960

Application Note, RS-485/RS-422 Circuit Implementation Guide.

Rev. 0 | Page 4 of 12

1 2 345 6 7...12

中文翻译

下载PDF

与20-313140相关器件

型号	品牌	获取价格	描述	数据表
203-14.31818M-17-50L	OSCILENT	获取价格	Parallel - Fundamental Quartz Crystal, 14.31818MHz Nom, RESISTANCE WELDED, GULLWING, HC-49
203-14.69M-12-10-TR	OSCILENT	获取价格	Parallel - Fundamental Quartz Crystal, 14.69MHz Nom, RESISTANCE WELDED, GULLWING, HC-49U,
203-14.69M-13	OSCILENT	获取价格	Parallel - Fundamental Quartz Crystal, 14.69MHz Nom, RESISTANCE WELDED, GULLWING, HC-49U,
203-14.69M-16-10K	OSCILENT	获取价格	Parallel - Fundamental Quartz Crystal, 14.69MHz Nom, RESISTANCE WELDED, GULLWING, HC-49U,
203-14.69M-16-H	OSCILENT	获取价格	Parallel - Fundamental Quartz Crystal, 14.69MHz Nom, RESISTANCE WELDED, GULLWING, HC-49U,
203-14.69M-16-H-TR	OSCILENT	获取价格	Parallel - Fundamental Quartz Crystal, 14.69MHz Nom, RESISTANCE WELDED, GULLWING, HC-49U,
203-14.69M-18-50G	OSCILENT	获取价格	Parallel - Fundamental Quartz Crystal, 14.69MHz Nom, RESISTANCE WELDED, GULLWING, HC-49U,
203-14.69M-20-10G-TR	OSCILENT	获取价格	Parallel - Fundamental Quartz Crystal, 14.69MHz Nom, RESISTANCE WELDED, GULLWING, HC-49U,
2031-42T	BOURNS	获取价格	Miniature 2-Pole Gas Discharge Tube
2031-42T-SM	BOURNS	获取价格	Miniature 2-Pole Gas Discharge Tube

与20-313140相关文章

NE5532P芯片资料：引脚说明、电气参数及替换型号推荐
2024-06-13

2
解读MMBT5401数据手册：电气参数及替换型号推荐
2024-06-13

3
深入解读BAV70数据手册：特性、电气参数及替换型号推荐
2024-06-13

4
74HC595D芯片引脚图及功能、参数介绍、替代型号推荐
2024-06-13

4

产品中心

服务支持

精选活动

关于我们

帮助中心

20-313140

20-313140 数据手册

与20-313140相关器件

与20-313140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

20-313140

20-313140 数据手册

与20-313140相关器件

与20-313140相关文章

您还可以找

您在本页遇到什么问题？