參數(shù)資料
型號(hào)： MAX481
廠商： Maxim Integrated Products, Inc.
元件分類(lèi)： 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(yè)數(shù)： 9/19頁(yè)
文件大?。?/td> 439K
代理商： MAX481
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
相關(guān)PDF資料
PDF描述
MAX481C Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481CPA Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481CSA Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481D Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
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