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參數(shù)資料
| 型號： | ADM3490 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 3.3 V Slew Rate Limited, Half- and Full-Duplex, RS-485/RS-422 Transceivers |
| 中文描述： | 3.3伏擺率限制，半和全雙工，RS-485/RS-422收發(fā)器 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 315K |
| 代理商： | ADM3490 |
ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
SPECIFICATIONS
V
CC
= 3.3 V ± 0.3 V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Rev. B | Page 4 of 20
Table 2.
Parameter
DRIVER
Differential Output Voltage (V
OD
)
Δ |V
OD
| for Complementary Output States
1
Common-Mode Output Voltage (V
OC
)
Δ |V
OC
| for Common-Mode Output Voltage
1
DRIVER INPUT LOGIC
CMOS Input Logic Threshold Low (V
IH
)
CMOS Input Logic Threshold High (V
IL
)
CMOS Logic Input Current (I
IN1
)
Input Current—A, B (I
IN2
)
Min
2.0
1.5
1.5
2.0
Typ
0.1
Max
0.2
3
0.2
0.8
±2
1.0
0.8
Unit
V
V
V
V
V
V
V
V
μA
mA
mA
μA
Test Conditions/Comments
R
L
= 100 Ω (RS-422), V
CC
= 3.3 V ± 5% (see Figure 7)
R
L
= 54 Ω (RS-485) (see Figure 7)
R
L
= 60 Ω (RS-485), V
CC
= 3.3 V (see Figure 8)
R
L
= 54 Ω or 100 Ω (see Figure 7)
R
L
= 54 Ω or 100 Ω (see Figure 7)
R
L
= 54 Ω or 100 Ω (see Figure 7)
DE, DI, RE
DE, DI, RE
DE, DI, RE
V
IN
= 12 V, DE = 0 V, V
CC
= 0 V or 3.6 V
V
IN
= 7 V, DE = 0 V, V
CC
= 0 V or 3.6 V
V
IN
= 12 V, DE = 0 V, RE = 0 V, V
CC
= 0 V or 3.6 V,
ADM3491 only
V
IN
= 7 V, DE = 0 V, RE = 0 V, V
CC
= 0 V or 3.6 V,
ADM3491 only
V
IN
= 12 V, DE = 0 V, RE = V
CC
, V
CC
= 0 V or 3.6 V,
ADM3491 only
V
IN
= 7 V, DE = 0 V, RE = V
CC
, V
CC
= 0 V or 3.6 V,
ADM3491 only
7 V < V
CM
< +12 V
V
CM
= 0 V
I
OUT
= 1.5 mA, V
ID
= 200 mV (see Figure 9)
I
OUT
= 2.5 mA, V
ID
= 200 mV (see Figure 9)
V
CC
= 3.6 V, 0 V ≤ V
OUT
≤ V
CC
7 V < V
CM
< +12 V
DE = V
CC
, RE = 0 V or V
CC
,
no load, DI = 0 V or V
CC
DE = 0 V, RE = 0 V, no load, DI = 0 V or V
CC
DE = 0 V, RE = V
CC
, DI = V
CC
or 0 V
V
OUT
= 7 V
V
OUT
= 12 V
0 V < V
RO
< V
CC
Output Leakage—Y, Z (I
O
)
0.1
μA
0.01
μA
Output Leakage (Y, Z) in Shutdown Mode (I
O
)
0.01
μA
RECEIVER
Differential Input Threshold Voltage (V
TH
)
Input Hysteresis (Δ V
TH
)
CMOS Output Voltage High (V
OH
)
CMOS Output Voltage Low (V
OL
)
Three-State Output Leakage Current (I
OZR
)
Input Resistance (R
IN
)
POWER SUPPLY CURRENT
Supply Current (I
CC
)
0.2
V
CC
– 0.4
12
±8
50
1.1
0.95
0.002
+0.2
0.4
±1
2.2
1.9
1
250
250
±60
V
mV
V
V
μA
kΩ
mA
mA
μA
mA
mA
mA
Supply Current in Shutdown Mode (I
SHDN
)
Driver Short-Circuit Output Current (I
OSD
)
Receiver Short-Circuit Output Current (I
OSR
)
1
Δ
V
OD
and
Δ
V
OC
are the changes in V
OD
and V
OC
, respectively, when DI input changes state.
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