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ADM1487 Scheda tecnica(PDF) 2 Page - Analog Devices

Il numero della parte ADM1487
Spiegazioni elettronici  Ultra-Low Power RS-485/RS-422 Transceiver
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM1487 Scheda tecnica(HTML) 2 Page - Analog Devices

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ADM1487
–2–
Rev. PrC
PRELIMINARY TECHNICAL DATA
ADM1487SPECIFICATIONS
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V ±5%, TA = 0°C TO +70°C, UNLESS OTHERWISE NOTED)
Parameter
Min
Typ
Max
Units
Test Conditions/Comments
Differential Driver Output Voltage,VOD1
5
V
Unloaded, IO = 0
Differential Driver Output Voltage, VOD2
2.0
V
Figure 1, R = 50
(RS-422)
1.5
5
V
Figure 1, R = 27
(RS-485)
Change in Magnitude of Driver
0.2
V
Figure 1, R = 27
or R = 50
Differential Output Voltage for
Complementary Output States,
VOD
Driver Common-Mode Output
3
V
Figure 1, R = 27
or R = 50
Voltage, VOC
Change in Magnitude of Driver
0.2
V
R = 27
or R = 50
Common-Mode Output Voltage for
Complementary Output States,
|VOC|
Input High Voltage (DE, DI,
RE), V
IH
2V
Input Low Voltage (DE, DI,
RE), V
IL
0.8
V
Input Current (DE, DI,
RE), I
IN1
±2
µA
Input Current (A, B), IIN2
0.30
m A
DE = 0, VCC= 0V or 5.25V, VIN = 12V
-0.15
m A
DE = 0, VCC = 0V or 5.25V, VIN = –7V
Differential Input Threshold Voltage
-0.2
0.2
V
–7V
VCM
12V
for Receiver, VTH
Receiver Input Hysteresis,
VTH
45
m V
VCM = 0V
Receiver Output High Voltage, VOH
3.5
V
IO =-4mA, VID = 200mV
Receiver Output Low Voltage, VOL
0.4
V
IO = 4mA, VID = –200mV
Three-State (High Impedance) Output
± 1
µ A
VCC = Max, 0.4V
Vo
2.4V
Current at Receive, IOZR
Receiver Input Resistance, RIN
70
96
k
–7V
VCM
12V
Supply Current, ICC
120
200
µ A
No Load, Output Enabled
80
120
µ A
No Load, Output Disabled
Supply Current in Shutdown Mode, ISHDN
1
10
µ A
DE = 0V,
RE = V
CC
Driver Short-Circuit Ourrent, IOSD1
35
250
m A
VOUT = HIGH, –7V
VO
12V
Driver Short-Circuit Ourrent, IOSD2
35
250
m A
VOUT = LOW, –7V
Vo
12V
Receiver Short-Circuit Current, IOSR
7
85
m A
0V
VO
VOC


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