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參數(shù)資料
| 型號(hào)： | MAX490 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | RS-485 |
| 英文描述： | Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers |
| 中文描述： | 低功耗、限擺率、RS-485/RS-422收發(fā)器 |
| 文件頁數(shù)： | 9/19頁 |
| 文件大?。?/td> | 439K |
| 代理商： | MAX490 |
MAX483/MAX487/MAX488/MAX489:
Reduced EMI and Reflections
The MAX483 and MAX487–MAX489 are slew-rate limit-
ed, minimizing EMI and reducing reflections caused by
improperly terminated cables. Figure 12 shows the dri-
ver output waveform and its Fourier analysis of a
150kHz signal transmitted by a MAX481, MAX485,
MAX490, MAX491, or MAX1487. High-frequency har-
monics with large amplitudes are evident. Figure 13
shows the same information displayed for a MAX483,
MAX487, MAX488, or MAX489 transmitting under the
same conditions. Figure 13’s high-frequency harmonics
have much lower amplitudes, and the potential for EMI
is significantly reduced.
M
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
_______________________________________________________________________________________
9
R
R
Y
Z
V
OD
V
OC
RECEIVER
OUTPUT
TEST POINT
1k
1k
S1
S2
V
CC
C
RL
15pF
DI
DE
3V
Y
Z
C
L1
C
L2
A
B
RO
RE
R
DIFF
V
ID
OUTPUT
UNDER TEST
500
S1
S2
V
CC
C
L
_________________________________________________________________Test Circuits
Figure 4. Driver DC Test Load
Figure 5. Receiver Timing Test Load
Figure 6. Driver/Receiver Timing Test Circuit
Figure 7. Driver Timing Test Load
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4901EBL | 制造商:Maxim Integrated Products 功能描述:LOW-RON DUAL-SPST CLICKLESS SWITCH - Rail/Tube |
| MAX4901EBL+ | 制造商:Maxim Integrated Products 功能描述:LOW-RON DUAL-SPST CLICKLESS SWITCH - Rail/Tube |
| MAX4901EBL+T | 制造商:Maxim Integrated Products 功能描述:LOW-RON DUAL-SPST CLICKLESS SWITCH - Tape and Reel |
| MAX4901EBL-T | 功能描述:模擬開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| MAX4901ETA | 制造商:Maxim Integrated Products 功能描述:LOW-RON DUAL-SPST CLICKLESS SWITCH - Rail/Tube |
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