參數資料
型號： ADM1487AN
廠商： ANALOG DEVICES INC
元件分類： 通用總線功能
英文描述： Ultra-Low Power RS-485/RS-422 Transceiver with Low EMI and +/-10kV ESD Protection
中文描述： LINE TRANSCEIVER, PDIP8
封裝： PLASTIC, DIP-8
文件頁數： 3/8頁
文件大?。?/td> 387K
代理商： ADM1487AN
ADM1487
Rev. PrC
–3–
ADM1487 SPECIFICATIONS (continued)
ELECTRICAL CHARACTERISTICS
(VCC = +5V ±5%, TA = -40°C TO +85°C, UNLESS OTHERWISE NOTED)
Parameter
Min
Typ
Max
Units Test Conditions/Comments
Differential Driver Output Voltage, V
OD1
5
V
Unloaded, I
O
= 0
Differential Driver Output Voltage, V
OD2
2.0
1.5
V
V
Figure 1, R = 50 (RS-422)
Figure 1, R = 27 (RS-485)
5
Driver Common-Mode
Output Voltage, V
OC
3
V
Figure 1, R = 27 or R = 50
Differential Input Threshold
Voltage for Receiver, V
TH
–0.2
0.2
V
–7V
V
CM
12V
Receiver Input Hysteresis,
V
TH
45
mV
V
CM
= 0V
Supply Current, I
CC
120
80
200
120
μA
μA
No Load, Output Enabled
No Load, Output Disabled
Supply Current in Shutdown Mode, I
SHDN
1
10
μA
DE = 0V,
RE
= V
CC
Driver Input to Output High, t
DPLH
150
1200
ns
Figures 2, 3, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Driver Input to Output Low, t
DPHL
150
1200
ns
Figures 2, 3, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Driver Output to Output, t
SKEW
100
600
ns
Figures 2, 3, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Driver Rise or Fall Time, t
DR
, t
DF
150
2000
ns
Figures 2, 3, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Receiver Input to Output High, t
RPLH
30
140
250
ns
Figures 2, 4, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Receiver Input to Output Low, t
RHL
30
140
250
ns
Figures 2, 4, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Differential Receiver Skew, t
SKD
|t
RPLH
-t
RPHL
|
13
ns
Figures 2, 4, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Maximum Data Rate, f
MAX
250
kbps
SWITCHING CHARACTERISTICS
(V
CC
= +5V ±5%, T
A
= -40°C TO +85°C, UNLESS OTHERWISE NOTED)
Parameter
Min
Typ
Max
Units
Test Conditions/Comments
Driver Input to Output High, t
DPLH
150
1200
ns
Figures 2, 3, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Driver Input to Output, t
DPHL
150
1200
ns
Figures 2, 3, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Driver Output to Output, t
SKEW
250
600
ns
Figures 2, 3, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Driver Rise or Fall Time, t
DR
, t
DF
150
1200
ns
Figures 2, 3, R
DIFF
= 54 ,
C
L1
= C
L2
= 100pF
Driver Enable to Output High, t
DZH
100
1500
ns
Figures 5, 6, C
L
= 100pF, S2 Closed
Driver Enable to Output Low, t
DZL
100
1500
ns
Figures 5, 6, C
L
= 100pF, S1 Closed
Driver Disable Time from Low, t
DLZ
150
1500
ns
Figures 5, 6, C
L
= l5pF, S1 Closed
PRELIMINARY TECHNICAL DATA
相關PDF資料
PDF描述
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參數描述
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