Data Sheet ADuM1280/ADuM1281/ADuM1285/ADuM1286
Rev. D | Page 5 of 18
Table 6. For All Models
Parameter Symbol Min Typ Max Unit Test Conditions
DC SPECIFICATIONS
Logic High Input Threshold V
IH
0.7 V
DDx
V
Logic Low Input Threshold V
IL
0.3 V
DDx
V
Logic High Output Voltages V
OH
V
DDx
− 0.1 3.0 V I
Ox
= −20 µA, V
Ix
= V
IxH
V
DDx
− 0.4 2.8 V I
Ox
= −3.2 mA, V
Ix
= V
IxH
Logic Low Output Voltages V
OL
0.0 0.1 V I
Ox
= 20 µA, V
Ix
= V
IxL
0.2 0.4 V I
Ox
= 3.2 mA, V
Ix
= V
IxL
Input Current per Channel I
I
−10 +0.01 +10 µA 0 V ≤ V
Ix
≤ V
DDx
Supply Current per Channel
Quiescent Input Supply Current I
DDI(Q)
0.4 0.6 mA
Quiescent Output Supply Current I
DDO(Q)
1.2 1.7 mA
Dynamic Input Supply Current I
DDI(D)
0.08 mA/Mbps
Dynamic Output Supply Current I
DDO(D)
0.015 mA/Mbps
Undervoltage Lockout
Positive V
DDx
Threshold V
DDxUV+
2.75 V
DDx
DDxUV−
V
DDX
Hysteresis V
DDxUVH
0.1 V
Output Rise/Fall Time t
R
/t
F
3 ns 10% to 90%
Common-Mode Transient Immunity
1
|CM| 25 35 kV/µs V
Ix
= V
DDx
, V
CM
= 1000 V,
transient magnitude = 800 V
Refresh Period t
r
1.6 µs
1
|CM| is the maximum common-mode voltage slew rate that can be sustained while maintaining V
o
> 0.8 V
DDX.
The common-mode voltage slew rates apply to both rising and
falling common-mode voltage edges.
ELECTRICAL CHARACTERISTICS—MIXED 5 V/3.3 V OPERATION
All typical specifications are at T
A
= 25°C, V
DD1
= 5 V, V
DD2
= 3 . 3 V. Minimum/maximum specifications apply over the entire recommended
operation range: 4.5 V ≤ V
DD1
≤ 5.5 V, 3.135 V ≤ V
DD2
≤ 3.6 V; and −40°C ≤ T
A
≤ 125°C, unless otherwise noted. Switching specifications are
tested with C
L
= 15 pF and CMOS signal levels unless otherwise noted.
Table 7.
A, WA Grades B, WB Grades C, WC Grades
Parameter Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions
SWITCHING SPECIFICATIONS
Pulse Width PW 1000 40 10 ns Within PWD limit
Propagation Delay t
PHL
, t
PLH
50 35 20 25 31 ns 50% input to 50%
output
Pulse Width Distortion PWD 10 3 2 ns |t
PLH
− t
PHL
|
Change vs. Temperature 7 3 1.5 ps/°C
Propagation Delay Skew t
PSK
38 16 12 ns Between any
two units at same
operating conditions
Channel Matching
1
Codirectional t
PSKCD
5 3 2 ns
Opposing-Direction t
PSKOD
10 6 5 ns
Jitter 2 2 1 ns
1
Codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on the same side of the isolation
barrier. Opposing-direction channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposing sides
of the isolation barrier.
