Datasheet > 驱动程序和接口 > 线路驱动器或接收器> ADM208EAR

ADM208EAR

更新时间： 2024-01-17 20:48:57

品牌	Logo	应用领域
亚德诺 - ADI		驱动器
页数	文件大小	规格书
16页	208K
描述
EMI/EMC Compliant, +-15 kV ESD Protected, RS-232 Line Drivers/Receivers

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技术参数
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ADM208EAR 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Contact Manufacturer	零件包装代码：	SOIC
包装说明：	SOP,	针数：	24
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.05
差分输出：	NO	驱动器位数：	4
输入特性：	SCHMITT TRIGGER	接口集成电路类型：	LINE TRANSCEIVER
接口标准：	EIA-232-E; V.28	JESD-30 代码：	R-PDSO-G24
JESD-609代码：	e3	长度：	15.4 mm
湿度敏感等级：	1	功能数量：	4
端子数量：	24	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
最大接收延迟：	2000 ns	接收器位数：	4
座面最大高度：	2.65 mm	最大供电电压：	5.5 V
最小供电电压：	4.5 V	标称供电电压：	5 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	MATTE TIN
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	7.5 mm	Base Number Matches：	1

ADM208EAR 数据手册

ADM206E/ADM207E/ADM208E/ADM211E/ADM213E

Table VI.

Testing for immunity involves irradiating the device with an EM

field. There are various methods of achieving this including use

of anechoic chamber, stripline cell, TEM cell, GTEM cell. A

stripline cell consists of two parallel plates with an electric field

developed between them. The device under test is placed within

the cell and exposed to the electric field. There are three severity

levels having field strengths ranging from 1 V to 10 V/m. Results

are classified in a similar fashion to those for IEC1000-4-4.

V Peak (kV)

PSU

V Peak (kV)

I-O

Level

0.5

0.25

0.5

1. Normal operation.

A simplified circuit diagram of the actual EFT generator is

illustrated in Figure 29.

2. Temporary degradation or loss of function which is self-

recoverable when the interfering signal is removed.

The transients are coupled onto the signal lines using an EFT

coupling clamp. The clamp is 1 m long and it completely sur-

rounds the cable providing maximum coupling capacitance

(50 pF to 200 pF typ) between the clamp and the cable. High

energy transients are capacitively coupled onto the signal lines.

Fast rise times (5 ns) as specified by the standard result in very

effective coupling. This test is very severe since high voltages are

coupled onto the signal lines. The repetitive transients can often

cause problems where single pulses don’t. Destructive latch-up

may be induced due to the high energy content of the transients.

Note that this stress is applied while the interface products are

powered up and are transmitting data. The EFT test applies

hundreds of pulses with higher energy than ESD. Worst case

transient current on an I-O line can be as high as 40A.

3. Temporary degradation or loss of function which requires

operator intervention or system reset when the interfering

signal is removed.

4. Degradation or loss of function which is not recoverable due

to damage.

The ADM2xxE family of products easily meets Classification 1

at the most stringent (Level 3) requirement. In fact field strengths

up to 30 V/m showed no performance degradation and error-free

data transmission continued even during irradiation.

Table VII. Test Severity Levels (IEC1000-4-3)

Field Strength

Level

V/m

Test results are classified according to the following:

1. Normal performance within specification limits.

2. Temporary degradation or loss of performance which is self-

recoverable.

3. Temporary degradation or loss of function or performance

which requires operator intervention or system reset.

EMISSIONS/INTERFERENCE

EN55 022, CISPR22 defines the permitted limits of radiated

and conducted interference from Information Technology (IT)

equipment. The objective of the standard is to minimize the

level of emissions both conducted and radiated.

4. Degradation or loss of function which is not recoverable due

to damage.

The ADM2xxE have been tested under worst case conditions

using unshielded cables and meet Classification 2. Data trans-

mission during the transient condition is corrupted but it may

be resumed immediately following the EFT event without user

intervention.

For ease of measurement and analysis, conducted emissions are

assumed to predominate below 30 MHz and radiated emissions

are assumed to predominate above 30 MHz.

CONDUCTED EMISSIONS

This is a measure of noise which gets conducted onto the line

power supply. Switching transients from the charge pump which

are 20 V in magnitude and containing significant energy can

lead to conducted emissions. Other sources of conducted emis-

sions can be due to overlap in switch on-times in the charge

pump voltage converter. In the voltage doubler shown below, if

S2 has not fully turned off before S4 turns on, this results in a

transient current glitch between V_CCand GND which results in

conducted emissions. It is therefore important that the switches

in the charge pump guarantee break-before-make switching

under all conditions so that instantaneous short circuit condi-

tions do not occur.

HIGH

VOLTAGE

SOURCE

50⍀

OUTPUT

Figure 29. IEC1000-4-4 Fast Transient Generator

IEC1000-4-3 RADIATED IMMUNITY

IEC1000-4-3 (previously IEC801-3) describes the measurement

method and defines the levels of immunity to radiated electro-

magnetic fields. It was originally intended to simulate the elec-

tromagnetic fields generated by portable radio transceivers or

any other device which generates continuous wave radiated

electromagnetic energy. Its scope has since been broadened to

include spurious EM energy which can be radiated from fluores-

cent lights, thyristor drives, inductive loads, etc.

The ADM2xxE has been designed to minimize the switching

transients and ensure break-before-make switching thereby

minimizing conducted emissions. This has resulted in the level

of emissions being well below the limits required by the specifi-

cation. No additional filtering/decoupling other than the recom-

mended 0.1 µF capacitor is required.

–12–

REV. B

1...9 10 111213 14 15 16

中文翻译

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ADM208EAR 替代型号

型号	品牌	替代类型	描述	数据表
ADM208EARZ	ADI	完全替代	EMI/EMC Compliant, ±15kV Protected, RS-232 23
SP208EET-L	EXAR	功能相似	Low Power, High ESD +5V RS-232 Transceivers

与ADM208EAR相关器件

型号	品牌	获取价格	描述	数据表
ADM208EAR-REEL	ADI	获取价格	EMI/EMC-Compliant, Â±15 kV ESDProtected, RS-2
ADM208EAR-REEL	ROCHESTER	获取价格	Line Transceiver, 4 Func, 4 Driver, 4 Rcvr, CMOS, PDSO24, MS-013AD, SOIC-24
ADM208EARS	ADI	获取价格	EMI/EMC Compliant, +-15 kV ESD Protected, RS-232 Line Drivers/Receivers
ADM208EARS	ROCHESTER	获取价格	Line Transceiver, 4 Func, 4 Driver, 4 Rcvr, CMOS, PDSO24, MO-150AG, SSOP-24
ADM208EARS-REEL	ADI	获取价格	EMI/EMC-Compliant, Â±15 kV ESDProtected, RS-2
ADM208EARS-REEL	ROCHESTER	获取价格	暂无描述
ADM208EARSZ	ROCHESTER	获取价格	Line Transceiver, 4 Func, 4 Driver, 4 Rcvr, CMOS, PDSO24, LEAD FREE, MO-150AG, SSOP-24
ADM208EARSZ	ADI	获取价格	EMI/EMC Compliant, ±15kV Protected, RS-232 23
ADM208EARSZ1	ADI	获取价格	EMI/EMC-Compliant, Â±15 kV ESDProtected, RS-2
ADM208EARSZ-REEL	ADI	获取价格	EMI/EMC Compliant, ±15kV Protected, RS-232 23

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