Datasheet

ADuM1250/ADuM1251 Data Sheet
Rev. I | Page 4 of 16
AC Specifications
1
All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. All typical
specifications are at T
A
= 25°C, V
DD1
= 3.3 V or 5 V, and V
DD2
= 3.3 V or 5 V, unless otherwise noted. Refer to Figure 5.
Table 2.
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
MAXIMUM FREQUENCY 1000 kHz
OUTPUT FALL TIME
5 V Operation
4.5 V ≤ V
DD1
, V
DD2
≤ 5.5 V, C
L1
= 40 pF,
R1 = 1.6 kΩ, C
L2
= 400 pF, R2 = 180 Ω
Side 1 Output (0.9 V
DD1
to 0.9 V) t
f1
13 26 120 ns
Side 2 Output (0.9 V
DD2
to 0.1 V
DD2
) t
f2
32 52 120 ns
3 V Operation
3.0 V ≤ V
DD1
, V
DD2
≤ 3.6 V, C
L1
= 40 pF,
R1 = 1.0 kΩ, C
L2
= 400 pF, R2 = 120 Ω
Side 1 Output (0.9 V
DD1
to 0.9 V) t
f1
13 32 120 ns
Side 2 Output (0.9 V
DD2
to 0.1 V
DD2
) t
f2
32 61 120 ns
PROPAGATION DELAY
5 V Operation
4.5 ≤ V
DD1
, V
DD2
≤ 5.5 V, C
L1
= C
L2
= 0 pF,
R1 = 1.6 kΩ, R2 = 180 Ω
Side 1 to Side 2, Rising Edge
2
t
PLH12
95 130 ns
Side 1 to Side 2, Falling Edge
3
t
PHL12
162 275 ns
Side 2 to Side 1, Rising Edge
4
t
PLH21
31 70 ns
Side 2 to Side 1, Falling Edge
5
t
PHL21
85 155 ns
3 V Operation
3.0 V ≤ V
DD1
, V
DD2
≤ 3.6 V, C
L1
= C
L2
= 0 pF,
R1 = 1.0 kΩ, R2 = 120 Ω
Side 1 to Side 2, Rising Edge
2
t
PLH12
82 125 ns
Side 1 to Side 2, Falling Edge
3
t
PHL12
196 340 ns
Side 2 to Side 1, Rising Edge
4
t
PLH21
32 75 ns
Side 2 to Side 1, Falling Edge
5
t
PHL21
110 210 ns
PULSE WIDTH DISTORTION
5 V Operation
4.5 V ≤ V
DD1
, V
DD2
≤ 5.5 V, C
L1
= C
L2
= 0 pF,
R1 = 1.6 kΩ, R2 = 180 Ω
Side 1 to Side 2, |t
PLH12
− t
PHL12
| PWD
12
67 145 ns
Side 2 to Side 1, |t
PLH21
− t
PHL21
| PWD
21
54 85 ns
3 V Operation
3.0 V ≤ V
DD1
, V
DD2
≤ 3.6 V, C
L1
= C
L2
= 0 pF,
R1 = 1.0 kΩ, R2 = 120 Ω
Side 1 to Side 2, |t
PLH12
− t
PHL12
| PWD
12
114 215 ns
Side 2 to Side 1, |t
PLH21
− t
PHL21
| PWD
21
77 135 ns
COMMON-MODE TRANSIENT IMMUNITY
6
|CM
H
|, |CM
L
| 25 35 kV/μs
1
All voltages are relative to their respective ground.
2
t
PLH12
propagation delay is measured from the Side 1 input logic threshold to an output value of 0.7 V
DD2
.
3
t
PHL12
propagation delay is measured from the Side 1 input logic threshold to an output value of 0.4 V.
4
t
PLH21
propagation delay is measured from the Side 2 input logic threshold to an output value of 0.7 V
DD1
.
5
t
PHL21
propagation delay is measured from the Side 2 input logic threshold to an output value of 0.9 V.
6
CM
H
is the maximum common-mode voltage slew rate that can be sustained while maintaining V
O
> 0.8 V
DD2
. CM
L
is the maximum common-mode voltage slew rate
that can be sustained while maintaining V
O
< 0.8 V. The common-mode voltage slew rates apply to both rising and falling common-mode voltage edges. The transient
magnitude is the range over which the common mode is slewed.