ADM485
SPECIFICATIONS
VCC = 5 V 5ꢀ, all specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
DRIVER
Differential Output Voltage, VOD
5.0
5.0
5.0
5.0
0.2
3
0.2
250
250
0.8
V
V
V
V
V
V
V
mA
mA
V
V
μA
R = ∞, see Figure 20
2.0
1.5
1.5
VCC = 5 V, R = 50 Ω (RS-422), see Figure 20
R = 27 Ω (RS-485), see Figure 20
VTST = −7 V to +12 V, see Figure 21
R = 27 Ω or 50 Ω, see Figure 20
R = 27 Ω or 50 Ω, see Figure 20
R = 27 Ω or 50 Ω
VOD3
Δ|VOD| for Complementary Output States
Common-Mode Output Voltage, VOC
Δ|VOD| for Complementary Output States
Output Short-Circuit Current, VOUT = High
Output Short-Circuit Current, VOUT = Low
CMOS Input Logic Threshold Low, VINL
CMOS Input Logic Threshold High, VINH
Logic Input Current (DE, DI)
35
35
−7 V ≤ VO ≤ +12 V
−7 V ≤ VO ≤ +12 V
2.0
1.0
RECEIVER
Differential Input Threshold Voltage, VTH
Input Voltage Hysteresis, ΔVTH
Input Resistance
−0.2
12
+0.2
V
−7 V ≤ VCM ≤ +12 V
VCM = 0 V
−7 V ≤ VCM ≤ +12 V
VIN = 12 V
70
mV
kΩ
mA
mA
V
Input Current (A, B)
1
–0.8
0.8
VIN = −7 V
CMOS Input Logic Threshold Low, VINL
CMOS Input Logic Threshold High, VINH
Logic Enable Input Current (RE)
CMOS Output Voltage Low, VOL
CMOS Output Voltage High, VOH
Short-Circuit Output Current
Three-State Output Leakage Current
POWER SUPPLY CURRENT
2.0
V
1
μA
V
V
mA
μA
0.4
IOUT = 4.0 mA
IOUT = −4.0 mA
VOUT = GND or VCC
0.4 V ≤ VOUT ≤ 2.4 V
4.0
7
85
1.0
ICC, Outputs Enabled
1.0
0.6
2.2
1
mA
mA
Digital inputs = GND or VCC
Digital inputs = GND or VCC
ICC, Outputs Disabled
Rev. F | Page 3 of 16
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