Datasheet

ADM485
Rev. F | Page 3 of 16
SPECIFICATIONS
V
CC
= 5 V ± 5%, all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
DRIVER
Differential Output Voltage, V
OD
5.0 V R = ∞, see Figure 20
2.0 5.0 V V
CC
= 5 V, R = 50 Ω (RS-422), see Figure 20
1.5 5.0 V R = 27 Ω (RS-485), see Figure 20
V
OD3
1.5 5.0 V V
TST
= −7 V to +12 V, see Figure 21
Δ|V
OD
| for Complementary Output States 0.2 V R = 27 Ω or 50 Ω, see Figure 20
Common-Mode Output Voltage, V
OC
3 V R = 27 Ω or 50 Ω, see Figure 20
Δ|V
OD
| for Complementary Output States 0.2 V R = 27 Ω or 50 Ω
Output Short-Circuit Current, V
OUT
= High 35 250 mA −7 V ≤ V
O
≤ +12 V
Output Short-Circuit Current, V
OUT
= Low 35 250 mA −7 V ≤ V
O
≤ +12 V
CMOS Input Logic Threshold Low, V
INL
0.8 V
CMOS Input Logic Threshold High, V
INH
2.0 V
Logic Input Current (DE, DI) ±1.0 μA
RECEIVER
Differential Input Threshold Voltage, V
TH
−0.2 +0.2 V −7 V ≤ V
CM
≤ +12 V
Input Voltage Hysteresis, ΔV
TH
70 mV V
CM
= 0 V
Input Resistance 12 kΩ −7 V ≤ V
CM
≤ +12 V
Input Current (A, B) 1 mA V
IN
= 12 V
–0.8 mA V
IN
= −7 V
CMOS Input Logic Threshold Low, V
INL
0.8 V
CMOS Input Logic Threshold High, V
INH
2.0 V
Logic Enable Input Current (RE)
±1
μA
CMOS Output Voltage Low, V
OL
0.4 V I
OUT
= 4.0 mA
CMOS Output Voltage High, V
OH
4.0 V I
OUT
= −4.0 mA
Short-Circuit Output Current 7 85 mA V
OUT
= GND or V
CC
Three-State Output Leakage Current ±1.0 μA 0.4 V ≤ V
OUT
≤ 2.4 V
POWER SUPPLY CURRENT
I
CC
, Outputs Enabled
1.0 2.2 mA Digital inputs = GND or V
CC
I
CC
, Outputs Disabled
0.6 1 mA Digital inputs = GND or V
CC