Datasheet

ADM2484E
Rev. C | Page 3 of 16
SPECIFICATIONS
All voltages are relative to their respective grounds, 3.0 V ≤ V
DD1
≤ 5.5 V and 3.0 V ≤ V
DD2
3.6 V, all minimum/maximum specifications
apply over the entire recommended operation range, all typical specifications are at T
A
= 25°C, V
DD1
= 5 V, andV
DD2
= 3.3 V, unless
otherwise noted.
Table 1.
Parameter Symbol Min Typ Max Unit Test Conditions
SUPPLY CURRENT
Power Supply Current, Logic Side
TxD/RxD Data Rate = 500 kbps I
DD1
2.0 mA Unloaded
2.0 mA V
DD2
= 3.6 V, half duplex configuration,
R
TERMINATION
= 120 , see Figure 20
Power Supply Current, Bus Side
TxD/RxD Data Rate = 500 kbps I
DD2
3.0 mA Unloaded
40 mA V
DD2
= 3.6 V, half duplex configuration,
R
TERMINATION
= 120 , see Figure 20
DRIVER
Differential Outputs
Differential Output Voltage |V
OD
| 2.0 3.6 V Loaded, R
L
= 100 Ω (RS-422), see
Figure 14
1.5 3.6 V R
L
= 54 Ω (RS-485), see Figure 14
1.5 3.6 V −7 V ≤ V
TEST
12 V, see Figure 15
|V
OD
| for Complementary Output States ∆|V
OD
| 0.2 V R
L
= 54or 100, see Figure 14
Common-Mode Output Voltage V
OC
3.0 V R
L
= 54or 100, see Figure 14
∆|V
OC
| for Complementary Output States ∆|V
OC
| 0.2 V R
L
= 54or 100, see Figure 14
Output Leakage Current (Y, Z Pins) I
O
+30 µA DE = 0 V, V
DD2
= 0 V or 3.3 V, V
IN
= +12 V
30 µA DE = 0 V, V
DD2
= 0 V or 3.3 V, V
IN
= 7 V
Short-Circuit Output Current I
OS
250 mA
Logic Inputs (DE,
RE
, TxD)
Input Threshold Low V
IL
0.25 × V
DD1
V
Input Threshold High V
IH
0.7 × V
DD1
V
Input Current I
I
10 +0.01 +10 µA
RECEIVER
Differential Inputs
Differential Input Threshold Voltage V
TH
−200 125 −30 mV 7 V < V
CM
< +12 V
Input Voltage Hysteresis V
HYS
15 mV V
OC
= 0 V
Input Current (A, B) I
I
+125 µA DE = 0 V, V
DD
= 0 V or 3.6 V, V
IN
= +12 V
100 µA DE = 0 V, V
DD
= 0 V or 3.6 V, V
IN
= −7 V
Line Input Resistance R
IN
96 kΩ 7 V < V
CM
< +12 V
Tristate Leakage Current I
OZR
±1 µA V
DD1
= 5 V, 0 V < V
OUT
< V
DD1
Logic Outputs
Output Voltage Low V
OLRxD
0.2 0.4 V I
ORxD
= 1.5 mA, V
A
V
B
= 0.2 V
Output Voltage High V
OHRxD
V
DD1
0.3 V
DD1
0.2 V I
ORxD
= −1.5 mA, V
A
V
B
= +0.2 V
Short-Circuit Current 100 mA
COMMON-MODE TRANSIENT IMMUNITY
1
25 kV/µs V
CM
= 1 kV, transient magnitude = 800 V
1
CM is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. V
CM
is the common-mode potential
difference between the logic and bus sides. The transient magnitude is the range over which the common mode is slewed. The common-mode voltage slew rates
apply to both rising and falling common-mode voltage edges.