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參數(shù)資料
| 型號(hào)： | ADM483E |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | +-15 kV ESD Protected, EMC Compliant Slew Rate Limited, EIA RS-485 Transceiver |
| 中文描述： | -15千伏ESD保護(hù)，EMC公司符合擺率限制，環(huán)境影響評(píng)估的RS - 485收發(fā)器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 324K |
| 代理商： | ADM483E |
–8–
REV. 0
ADM483E
The ADM483E has been tested under worst case conditions
using unshielded cables, and meets Classification 2 at severity
Level 4. Data transmission during the transient condition is
corrupted, but it may be resumed immediately following the
EFT event without user intervention.
RADIATED IMMUNITY (IEC1000-4-3)
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 electro-
magnetic fields generated by portable radio transceivers or any
other device that generates continuous wave radiated electromag-
netic energy. Its scope has since been broadened to include
spurious EM energy, which can be radiated from fluorescent
lights, thyristor drives, inductive loads, etc.
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 and GTEM cell.
These consist essentially of two parallel plates with an electric
field developed between them. The device under test is placed
between the plates 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 IEC1000-4-2.
1. Normal Operation.
2. Temporary Degradation or loss of function that is self-
recoverable when the interfering signal is removed.
3. Temporary degradation or loss of function that requires
operator intervention or system reset when the interfering
signal is removed.
4. Degradation or loss of function that is not recoverable due to
damage.
The ADM483E comfortably 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 VI.
Level
V/m
Field Strength
1
2
3
1
3
10
EMI EMISSIONS
The ADM483E contains internal slew rate limiting in order to
minimize the level of electromagnetic interference generated.
Figure 25 shows an FFT plot when transmitting a 150 kHz
data stream.
10
0%
100
90
10dB/DIV
500kHz/DIV
0
5MHz
Figure 25. Driver Output Waveform and FFT Plot Trans-
mitting @ 150 kHz
As may be seen, the slew limiting attenuates the high frequency
components. EMI is therefore reduced, as are reflections due to
improperly terminated cables.
EN55022, CISPR22 defines the permitted limits of radiated
and conducted interference from Information Technology
Equipment (ITE).
The objective is to control the level of emissions, both con-
ducted and radiated.
For ease of measurement and analysis, conducted emissions are
assumed to predominate below 30 MHz, while radiated
emissions predominate above this frequency.
CONDUCTED EMISSIONS
This is a measure of noise that is conducted onto the mains
power supply. The noise is measured using a LISN (Linc
Impedance Stabilizing Network) and a spectrum analyzer. The
test setup is illustrated in Figure 26. The spectrum analyzer is
set to scan the spectrum from 0 MHz to 30 MHz. Figure 27
shows that the level of conducted emissions from the
ADM483E are well below the allowable limits.
SPECTRUM
ANALYSER
DUT
LISN
PSU
Figure 26. Conducted Emissions Test Setup
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| ADM483EAN | 功能描述:IC TX/RX RS-485 LO-SLEW 5V 8DIP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
| ADM483EANZ | 功能描述:IC TX/RX RS-485 LO-SLEW 5V 8DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:RS-232 & USB Transceiver 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):1/1 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:296-19849-2 |
| ADM483EANZ | 制造商:Analog Devices 功能描述:Transceiver IC |
| ADM483EAR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:TRANSCEIVER IC RS485 3.3V SO8 ((NS)) |
| ADM483EAR-1 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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