ADuM4121/ADuM4121-1
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Ambient temperature = 25°C, unless otherwise noted.
THERMAL RESISTANCE
Thermal performance is directly linked to printed circuit board
(PCB) design and operating environment. Careful attention to
PCB thermal design is required. θJA is thermal resistance,
junction to ambient (°C/W).
Table 7.
Parameter
Rating
Storage Temperature Range (TST)
Junction Operating Temperature Range (TJ)
Supply Voltages
VDD1 to GND1
VDD2 to GND2
−55°C to +150°C
−40°C to +125°C
Table 8. Thermal Resistance
−0.3 V to +7 V
−0.3 V to +40 V
Package Type
θJA
Unit
RI-8-11
°C/W
104.2
Input Voltages
1 Test Condition 1: thermal impedance simulated values are based on a
4-layer PCB.
VI+, VI−1
−0.3 V to +7 V
−0.3 V to VDD2 + 0.3 V
2
VCLAMP
Output Voltages
2
VOUT
−0.3 V to VDD2 + 0.3 V
−200 kV/µs to
+200 kV/µs
ESD CAUTION
Common-Mode Transients (|CM|)3
1 Rating assumes VDD1 is above 2.5 V. VI+ and VI− are rated up to 6.5 V when
VDD1 is unpowered.
2 Referenced to GND2, maximum of 40 V.
3 |CM| refers to common-mode transients across the insulation barrier.
Common-mode transients exceeding the Absolute Maximum Rating can
cause latch-up or permanent damage.
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
Table 9. Maximum Continuous Working Voltage1
Parameter
Rating Unit
Constraint
AC Voltage
Bipolar Waveform
Basic Insulation
849
V peak 50-year minimum insulation lifetime
Reinforced Insulation 789
Unipolar Waveform
V peak Lifetime limited by package creepage maximum approved working voltage per IEC 60950-1
Basic Insulation
Reinforced Insulation 849
DC Voltage
1698
V peak 50-year minimum insulation lifetime
V peak 50-year minimum insulation lifetime
Basic Insulation
Reinforced Insulation 558
1118
V peak Lifetime limited by package creepage maximum approved working voltage per IEC 60950-1
V peak Lifetime limited by package creepage maximum approved working voltage per IEC 60950-1
1 Maximum continuous working voltage refers to continuous voltage magnitude imposed across the isolation barrier. See the Insulation Lifetime section for more
details.
Table 10. Truth Table
VI−
VI+
VDD1 State
Powered
Powered
Powered
Unpowered
Powered
VDD2 State
Powered
Powered
Powered
Powered
Unpowered
VOUT Output
Low
High
Low
Low
Low1
Don’t care
Low
High
Don’t care
Don’t care
Low
High
Don’t care
Don’t care
Don’t care
1 The output is low, but not actively driven because the device is not powered.
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