ADM3485E
Rev. D | Page 3 of 16
SPECIFICATIONS
V
CC
= +3.3 V ± 0.3 V. All specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
DRIVER
Differential Outputs
Differential Output Voltage V
OD
2.0 V R
L
= 100 Ω (RS-422) (see Figure 3)
1.5 V R
L
= 54 Ω (RS-485) (see Figure 3)
1.5 V R
L
= 60 Ω (RS-485) (see Figure 4)
∆|V
OD
| for Complementary Output States
1
∆V
OD
0.2 V R
L
= 54 Ω or 100 Ω (see Figure 3)
Common-Mode Output Voltage V
OC
3 V R
L
= 54 Ω or 100 Ω ( see Figure 3)
∆|V
OC
| for Complementary Output States
1
∆V
OC
0.2 V R
L
= 54 Ω or 100 Ω (see Figure 3)
Short-Circuit Output Current I
OSD
–250 mA V
OUT
= –7 V
250 mA V
OUT
= 12 V
Logic Inputs
Input Low Voltage V
IL
0.8 V
DE, DI, RE
Input High Voltage V
IH
2.0 V
DE, DI, RE
Logic Input Current I
IN1
±2 µA
DE, DI, RE
RECEIVER
Differential Inputs
Differential Input Threshold Voltage V
TH
–0.2 +0.2 V –7 V < V
CM
< +12 V
Input Voltage Hysteresis ∆V
TH
50 mV V
CM
= 0 V
Input Resistance (A, B) R
IN
12 kΩ –7 V < V
CM
< +12 V
Input Current (A, B) I
IN2
1.0 mA DE = 0 V, V
CC
= 0 V or 3.6 V, V
IN
= 12 V
–0.8 mA DE = 0 V, V
CC
= 0 V or 3.6 V, V
IN
= –7 V
RO Logic Output
Output Voltage High V
OH
V
CC
– 0.4 V V I
OUT
= –1.5 mA, V
ID
= 200 mV (see Figure 5)
Output Voltage Low V
OL
0.4 V I
OUT
= 2.5 mA, V
ID
= 200 mV (see Figure 5)
Short-Circuit Output Current I
OSR
±8 ±60 mA 0 V < V
RO
< V
CC
Tristate Output Leakage Current I
OZR
±1 µA V
CC
= 3.6 V, 0 V < V
OUT
< V
CC
POWER SUPPLY CURRENT
Voltage Range V
CC
3.0 3.6 V
Supply Current I
CC
1.1 2.2 mA
No load, DI = 0 V or V
CC
, DE = V
CC
,
RE
= 0 V or V
CC
0.95 1.9 mA
No load, DI = 0 V or V
CC
, DE = 0 V,
RE
= 0 V
Shutdown Current I
SHDN
0.002 1 µA
DE = 0 V, RE = V
CC
, DI = 0 V or V
CC
ESD PROTECTION
A, B Pins ±15 kV Human body model
All Pins Except A, B ±4 kV Human body model
1
Δ|V
OD
| and Δ|V
OC
| are the changes in V
OD
and V
OC
, respectively, when DI input changes state.
