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參數(shù)資料
| 型號： | ADM3490E |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 3.3 V, 【15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers |
| 中文描述： | 3.3伏特，【15千伏ESD保護(hù)，半和全雙工，RS-485/RS-422收發(fā)器 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 503K |
| 代理商： | ADM3490E |
ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
TEST CIRCUITS AND SWITCHING CHARACTERISTICS
Rev. A | Page 9 of 20
V
OC
R
L
/2
R
L
/2
Z
Y
V
OD
0
Figure 7. Driver Differential Output Voltage and
Common-Mode Output Voltage
R
L
375
375
V
OD
V
=
–7V TO +12V
D
V
CC
0
Figure 8. Driver Differential Output Voltage with
Varying Common-Mode Voltage
V
OH
I
OH
(–)
V
ID
R
0
I
OL
(+)
V
OL
0
Figure 9. Receiver Output Voltage High and Output Voltage Low
IN
OUT
+1.5V
+1.5V
+3V
0V
≈
+2V
≈
–2V
t
DD
t
DD
t
TD
t
TD
50%
10%
50%
10%
90%
90%
D
GENERATOR
1
V
CC
50
C
L
R
L
=
60
C
L
= 15pF
2
OUT
1
PPR = 250kHz, 50% DUTY CYCLE,
t
≤
6.0ns, Z
= 50
.
2
C
L
INCLUDES PROBE AND STRAY CAPACITANCE.
0
Figure 10. Driver Differential Output Delay and Transition Times
3V
0V
V
OH
V
OL
V
OH
V
OL
V
OM
V
OM
V
OM
V
OM
IN
Y
OUT
Z
OUT
1.5V
1.5V
t
PLH
t
PHL
t
PHL
t
PLH
D
V
OM
R
L
= 27
OUT
C
L
= 15pF
2
GENERATOR
1
V
CC
50
S1
V
OM
=
V
OH
+ V
OL
2
≈
1.5V
1
PPR = 250kHz, 50% DUTY CYCLE,
t
≤
6.0ns, Z
= 50
.
2
C
L
INCLUDES PROBE AND STRAY CAPACITANCE.
0
Figure 11. Driver Propagation Delays
D
OUT
C
L
= 50pF
2
GENERATOR
1
50
S1
V
OM
=
V
OH
+ V
OL
2
≈
1.5V
R
L
= 110
0V OR 3V
1
PPR = 250kHz, 50% DUTY CYCLE,
t
≤
6.0ns, Z
= 50
.
2
C
L
INCLUDES PROBE AND STRAY CAPACITANCE.
0V
V
OH
0V
3V
1.5V
1.5V
0.25V
IN
OUT
V
OM
t
PZH
t
PHZ
0
Figure 12. Driver Enable and Disable Times (t
PZH
, t
PSH
, t
PHZ
)
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| adm3491an-1 | 制造商:Analog Devices 功能描述: |
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