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参数资料
| 型号： | ADM489ARZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS-485 DIFF LP 14SOIC |
| 标准包装： | 2,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS422，RS485 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOICN |
| 包装： | 带卷 (TR) |
ADM488/ADM489
Rev. D | Page 13 of 16
The ADM488/ADM489 comfortably meet 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 9. Field Strengths
Level V/m
Field Strength
1
2
3
10
EMI EMISSIONS
The ADM488/ADM489 contain internal slew rate limiting to
minimize the level of electromagnetic interference generated.
Figure 27 shows an FFT plot when transmitting a 150 kHz data
stream.
10
0%
100
90
10dB/DIV
500kHz/DIV
05MHz
00
07
9-
0
27
Figure 27. Driver Output Waveform and FFT Plot Transmitting at 150 kHz
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 both conducted and
radiated emissions.
For ease of measurement and analysis, conducted emissions are
assumed to predominate below 30 MHz, while radiated
emissions predominate above this frequency.
CONDUCTED EMISSIONS
Conducted emissions are a measure of noise that is conducted
onto the main power supply. The noise is measured using a
LISN (line impedance stabilizing network) and a spectrum
analyzer. The test setup is shown in Figure 28. The spectrum
analyzer is set to scan the spectrum from 0 MHz to 30 MHz.
Figure 29 shows that the level of conducted emissions from the
ADM488/ADM489 is well below the maximum allowable
limits.
DUT
LISN
PSU
SPECTRUM
ANALYZER
00
07
9-
0
28
Figure 28. Conducted Emissions Test Setup
log FREQUENCY (0.15–30) (MHz)
0.3
0.6
1
36
10
30
80
0
70
40
30
20
10
60
50
LIMIT
dB
(
V
)
00
07
9-
0
29
Figure 29. Conducted Emissions
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| ADM489ARZ-REEL7 | 功能描述:IC TXRX RS-485 DIFF LP 14SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:121 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS422，RS485 电源电压:3 V ~ 3.6 V 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-DFN（3x3） 包装:管件 |
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| ADM-51 | 制造商:TDK 功能描述: |
| ADM5120 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:HOME GATEWAY CONTROLLER |
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