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ADM4850 Datasheet(PDF) 3 Page - Analog Devices

Part No. ADM4850
Description  5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers
Download  16 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM4850 Datasheet(HTML) 3 Page - Analog Devices

 
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ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857
Rev. D | Page 3 of 16
SPECIFICATIONS
VCC = 5 V ± 5%, TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
DRIVER
Differential Output Voltage, VOD
VCC
V
R = ∞, see Figure 181
2.0
5
V
R = 50 Ω (RS-422), see Figure 18
1.5
5
V
R = 27 Ω (RS-485), see Figure 18
|VOD3|
1.5
5
V
VTST = −7 V to 12 V, see Figure 19
∆|VOD| for Complementary Output States
0.2
V
R = 27 Ω or 50 Ω, see Figure 18
Common-Mode Output Voltage, VOC
3
V
R = 27 Ω or 50 Ω, see Figure 18
∆|VOC| for Complementary Output States
0.2
V
R = 27 Ω or 50 Ω, see Figure 18
Output Short-Circuit Current, VOUT = High
−200
+200
mA
−7 V < VOUT < +12 V
Output Short-Circuit Current, VOUT = Low
−200
+200
mA
−7 V < VOUT < +12 V
DRIVER INPUT LOGIC
CMOS Input Logic Threshold Low
0.8
V
CMOS Input Logic Threshold High
2.0
V
CMOS Logic Input Current (DI)
±1
μA
DE Input Resistance to GND
220
RECEIVER
Differential Input Threshold Voltage, VTH
−200
−125
−30
mV
−7 V < VOC < +12 V
Input Hysteresis
20
mV
−7 V < VOC < +12 V
Input Resistance (A, B)
96
150
−7 V < VOC < +12 V
Input Current (A, B)
0.125
mA
VIN = +12 V
−0.1
mA
VIN = −7 V
CMOS Logic Input Current (RE)
±1
μA
CMOS Output Voltage Low
0.4
V
IOUT = +4 mA
CMOS Output Voltage High
4.0
V
IOUT = −4 mA
Output Short-Circuit Current
7
85
mA
VOUT = GND or VCC
Three-State Output Leakage Current
±2
μA
0.4 V ≤ VOUT ≤ 2.4 V
POWER SUPPLY CURRENT
115 kbps Options (ADM4850/ADM4854)
5
μA
DE = 0 V, RE = VCC (shutdown)
36
60
μA
DE = 0 V, RE = 0 V
100
160
μA
DE = VCC
500 kbps Options (ADM4851/ADM4855)
5
μA
DE = 0 V, RE = VCC (shutdown)
80
120
μA
DE = 0 V, RE = 0 V
120
200
μA
DE = VCC
2.5 Mbps Options (ADM4852/ADM4856)
5
μA
DE = 0 V, RE = VCC (shutdown)
250
400
μA
DE = 0 V, RE = 0 V
320
500
μA
DE = VCC
10 Mbps Options (ADM4853/ADM4857)
5
μA
DE = 0 V, RE = VCC (shutdown)
250
400
μA
DE = 0 V, RE = 0 V
320
500
μA
DE = VCC
1 Guaranteed by design.


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