參數(shù)資料
型號: HWD491MJD
廠商: Electronic Theatre Controls, 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,限擺率限制RS-485/RS-422收發(fā)器
文件頁數(shù): 9/20頁
文件大?。?/td> 502K
代理商: HWD491MJD
HWD483/HWD487/HWD488/HWD489:
Reduc ed EMI and Reflec tions
The HWD483 and HWD487–HWD489 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 HWD481, HWD485,
HWD490, HWD491, or HWD1487. High-frequency har-
monics with large amplitudes are evident. Figure 13
shows the same information displayed for a HWD483,
HWD487, HWD488, or HWD489 transmitting under the
same conditions. Figure 13’s high-frequency harmonics
have much lower amplitudes, and the potential for EMI
is significantly reduced.
Low-Power, S lew-Rate-Limited
RS -485/RS -422 Transc eivers
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 Circ uits
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
9
相關PDF資料
PDF描述
HWD490CUA IEC AC Power Inlet; Voltage Rating: 250V; Current Rating: 15A; Mounting Type: Panel; Terminal Type: Tabs
HWL26YC L-Band Power FET Via Hole Chip
HWL34YRA L-Band GaAs Power FET
HWS301 GaAs MMIC SPDT Switch
HWS303 GaAs MMIC SPDT Switch
相關代理商/技術參數(shù)
參數(shù)描述
HWD56 制造商:NTE Electronics 功能描述:Res Metal Film 0.56 Ohm 5% 1/2W ±100ppm/°C Conformal AXL Thru-Hole
HWD62 制造商:NTE Electronics 功能描述:Res Metal Film 0.62 Ohm 5% 1/2W ±100ppm/°C Conformal AXL Thru-Hole
HWD68 制造商:NTE Electronics 功能描述:Res Metal Film 0.68 Ohm 5% 1/2W ±100ppm/°C Conformal AXL Thru-Hole
HWD75 制造商:NTE Electronics 功能描述:Res Metal Film 0.75 Ohm 5% 1/2W ±100ppm/°C Conformal AXL Thru-Hole
HWD82 制造商:NTE Electronics 功能描述:Res Metal Film 0.82 Ohm 5% 1/2W ±100ppm/°C Conformal AXL Thru-Hole