Data Sheet
ABSOLUTE MAXIMUM RATINGS
Ambient temperature = 25°C, unless otherwise noted. Table 13.
Parameter
Storage Temperature (TST)
Ambient Operating Temperature (TA)1 Ambient Operating Temperature (TA)2 Supply Voltages (VDD1, VDD2)3
Input Voltage (VIA, VIB, VIC, VID, VE1, VE2)3, 4 Output Voltage (VOA, VOB, VOC, VOD)3, 4 Average Output Current per Pin5 Side 1 (IO1) Side 2 (IO2)
Common-Mode Transients6
1
ADuM1400/ADuM1401/ADuM1402
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.
Rating
−65°C to +150°C −40°C to +105°C −40°C to +125°C −0.5 V to +7.0 V −0.5 V to VDDI + 0.5 V −0.5 V to VDDO + 0.5 V −18 mA to +18 mA −22 mA to +22 mA
−100 kV/µs to +100 kV/µs
ESD CAUTION
Does not apply to ADuM1400W, ADuM1401W, and ADuM1402W automotive grade versions. 2
Applies to ADuM1400W, ADuM1401W, and ADuM1402W automotive grade versions. 3
All voltages are relative to their respective ground. 4
VDDI and VDDO refer to the supply voltages on the input and output sides of a given channel, respectively. See the PC Board Layout section. 5
See Figure 4 for maximum rated current values for various temperatures. 6
This refers to common-mode transients across the insulation barrier. Common-mode transients exceeding the Absolute Maximum Ratings may cause latch-up or permanent damage.
Table 14. Maximum Continuous Working Voltage1
Parameter
AC Voltage, Bipolar Waveform AC Voltage, Unipolar Waveform Basic Insulation
Reinforced Insulation DC Voltage
Basic Insulation
Reinforced Insulation
1
Max 565 1131 560 1131 560
Unit V peak V peak V peak V peak V peak
Constraint
50-year minimum lifetime
Maximum approved working voltage per IEC 60950-1
Maximum approved working voltage per IEC 60950-1 and VDE V 0884-10 Maximum approved working voltage per IEC 60950-1
Maximum approved working voltage per IEC 60950-1 and VDE V 0884-10
Refers to continuous voltage magnitude imposed across the isolation barrier. See the Insulation Lifetime section for more details.
Table 15. Truth Table (Positive Logic)
VIx Input1 H L X X X X
VEx Input1, 2 H or NC H or NC L
H or NC L X
VDDI State1 Powered Powered Powered Unpowered Unpowered Powered
VDDO State1 Powered Powered Powered Powered Powered Unpowered
VOx Output1 Notes H L Z H Outputs return to the input state within 1 µs of VDDI power restoration. Z
Indeterminate Outputs return to the input state within 1 µs of VDDO power restoration
if the VEx state is H or NC. Outputs return to a high impedance state within 8 ns of VDDO power restoration if the VEx state is L.
VIx and VOx refer to the input and output signals of a given channel (A, B, C, or D). VEx refers to the output enable signal on the same side as the VOx outputs. VDDI and VDDO refer to the supply voltages on the input and output sides of the given channel, respectively. 2
In noisy environments, connecting VEx to an external logic high or low is recommended.
1
Rev. L | Page 21 of 31
ADuM1400/ADuM1401/ADuM1402
For example, at a magnetic field frequency of 1 MHz, the maximum allowable magnetic field of 0.2 kgauss induces a voltage of 0.25 V at the receiving coil. This is about 50% of the sensing threshold and does not cause a faulty output transition. Similarly, if such an event occurs during a transmitted pulse (and has the worst-case polarity), it reduces the received pulse from >1.0 V to 0.75 V—still well above the 0.5 V sensing threshold of the decoder.
The preceding magnetic flux density values correspond to specific current magnitudes at given distances from the
ADuM1400/ADuM1401/ADuM1402 transformers. Figure 20 expresses these allowable current magnitudes as a function of frequency for selected distances. As shown, the ADuM1400/ ADuM1401/ADuM1402 are extremely immune and can be affected only by extremely large currents operated at high
frequency very close to the component. For the 1 MHz example noted, one would have to place a 0.5 kA current 5 mm away from the ADuM1400/ADuM1401/ADuM1402 to affect the operation of the component.
1000Data Sheet
POWER CONSUMPTION
The supply current at a given channel of the ADuM1400/ ADuM1401/ADuM1402 isolator is a function of the supply voltage, the data rate of the channel, and the output load of the channel.
For each input channel, the supply current is given by
IDDI = IDDI (Q)
IDDI = IDDI (D) × (2f − fr) + IDDI (Q) IDDO = IDDO (Q)
f ≤ 0.5 fr f > 0.5 fr f ≤ 0.5 fr
For each output channel, the supply current is given by
IDDO = (IDDO (D) + (0.5 × 10−3) × CL × VDDO) × (2f − fr) + IDDO (Q)
f > 0.5 fr where:
IDDI (D), IDDO (D) are the input and output dynamic supply currents per channel (mA/Mbps).
CL is the output load capacitance (pF). VDDO is the output supply voltage (V).
f is the input logic signal frequency (MHz); it is half of the input data rate expressed in units of Mbps. fr is the input stage refresh rate (Mbps).
IDDI (Q), IDDO (Q) are the specified input and output quiescent supply currents (mA).
To calculate the total VDD1 and VDD2 supply current, the supply currents for each input and output channel corresponding to VDD1 and VDD2 are calculated and totaled. Figure 8 and Figure 9 provide per-channel supply currents as a function of data rate for an unloaded output condition. Figure 10 provides per-channel supply current as a function of data rate for a 15 pF output condition. Figure 11 through Figure 15 provide total VDD1 and VDD2 supply current as a function of data rate for ADuM1400/ADuM1401/ADuM1402 channel configurations.
MAXIMUM ALLOWABLE CURRENT (kA)DISTANCE = 1m10010DISTANCE = 100mm1DISTANCE = 5mm0.11k10k100k1M10M100MMAGNETIC FIELD FREQUENCY (Hz)Figure 20. Maximum Allowable Current for Various Current-to-ADuM1400/ADuM1401/ADuM1402 Spacings
Note that at combinations of strong magnetic field and high frequency, any loops formed by printed circuit board traces could induce error voltages sufficiently large enough to trigger the thresholds of succeeding circuitry. Care should be taken in the layout of such traces to avoid this possibility.
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