Datasheet

Data Sheet ADM3252E
Rev. A | Page 3 of 16
SPECIFICATIONS
All voltages are relative to their respective grounds, all minimum/maximum specifications apply over the entire recommended operating
range, T
A
= −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
DC CHARACTERISTICS
V
CC
Operating Voltage Range 3.0 3.3 5.5 V
UVLO Threshold
Rising 2.7 V Undervoltage lockout
Falling 2.3 V
Input Supply Current, I
CC
20 35 mA No load
45 75 mA R
L
= 3 kΩ, V
CC
= 3.0 V to 5.5 V
35 60 mA R
L
= 3 kΩ, V
CC
= 3.3 V
V
ISO
Output 3.3 V I
ISO
= 0 μA
V
ISO
Maximum Load Current, I
ISO(MAX)
15 mA
LOGIC
Transmitter Inputs, T
IN1
and T
IN2
Logic Input Current
−10
+0.01
+10
μA
Logic Input Threshold
Low
0.3 × V
CC
V
High
0.7 × V
CC
V
Receiver Outputs, R
OUT1
and R
OUT2
Logic High Output
V
CC
− 0.2
V
CC
V
I
ROUTH
= −20 μA
V
CC
− 0.5
V
CC
− 0.3
V
I
ROUTH
= −4 mA
Logic Low Output 0.0 0.1 V I
ROUTH
= 20 μA
0.2 0.4 V I
ROUTH
= 4 mA
RS-232
Receiver Inputs, R
IN1
and R
IN2
EIA-232 Input
Voltage Range
1
−30 +30 V
Threshold Low
0.8
1.0
V
Threshold High
1.5
2.0
V
Hysteresis
0.45
V
Resistance
3
5
7
kΩ
Transmitter Outputs, T
OUT1
and T
OUT2
Output Voltage Swing (RS-232)
±5.0
±5.2
V
R
L
= 3 kΩ to GND
Transmitter Output Resistance
300
Ω
V
CC
= 0 V, V
ISO
= 0 V
Output Short-Circuit Current (RS-232)
±15
mA
TIMING CHARACTERISTICS
Maximum Data Rate 460 kbps R
L
= 3 kΩ to 7 kΩ, C
L
= 50 pF to 1000 pF
Receiver Propagation Delay
t
PHL
0.4 1 μs
t
PLH
0.4 1 μs
Transmitter Propagation Delay 0.3 1.2 μs R
L
= 3 kΩ, C
L
= 1000 pF
Transmitter Skew 30 ns
Receiver Skew 300 ns
Transition Region Slew Rate 10 V/μs
Measured from +3 V to −3 V or −3 V to +3 V,
V
CC
= +3.3 V, R
L
= 3 kΩ, C
L
= 1000 pF, T
A
= 25°C