Datasheet

ADM488A/ADM489A
Rev. A | Page 3 of 16
SPECIFICATIONS
V
CC
= 5 V ± 10%; all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
DRIVER
Differential Output Voltage V
OD
5.0 V R = ∞, see Figure 11
2.0 5.0 V V
CC
= 5 V, R = 50 Ω (RS-422), see Figure 11
1.5 5.0 V R = 27 Ω (RS-485), see Figure 11
1.5 5.0 V V
TST
= –7 V to +12 V, see Figure 12, V
CC
= 5 V ± 5%
Δ|V
OD
| for Complementary Output States 0.2 V R = 27 Ω or 50 Ω, see Figure 11
Common-Mode Output Voltage V
OC
3.0 V R = 27 Ω or 50 Ω, see Figure 11
Δ|V
OC
| for Complementary Output States 0.2 V R = 27 Ω or 50 Ω
Output Short-Circuit Current
V
OUT
250 mA −7 V ≤ V
O
≤ +12 V
CMOS Input Logic Threshold Low V
INL
1.4 0.8 V
CMOS Input Logic Threshold High V
INH
2.0 1.4 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
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 unloaded, receivers enabled
30 60 µA DE = 0 V (disabled)
37 74 µA DE = 5 V (enabled)