ADA4411-3
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Power Dissipation
Storage Temperature
Operating Temperature Range
Lead Temperature Range (Soldering 10 sec)
Junction Temperature
The power dissipated in the package (PD) is the sum of the
Rating
quiescent power dissipation and the power dissipated in the
package due to the load drive for all outputs. The quiescent
power is the voltage between the supply pins (VS) times the
quiescent current (IS). The power dissipated due to load drive
depends on the particular application. For each output, the
power due to load drive is calculated by multiplying the load
current by the associated voltage drop across the device. The
power dissipated due to all of the loads is equal to the sum of
the power dissipations due to each individual load. RMS
voltages and currents must be used in these calculations.
12 V
See Figure 2
–6±°C to +12±°C
–40°C to +8±°C
300°C
1±0°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Airflow increases heat dissipation, effectively reducing θJA.
In addition, more metal directly in contact with the package
leads from metal traces, through-holes, ground, and power
planes reduces the θJA.
THERMAL RESISTANCE
Figure 2 shows the maximum safe power dissipation in the
package vs. the ambient temperature for the 24-lead QSOP
(83°C/W) on a JEDEC standard 4-layer board. θJA values are
approximations.
θJA is specified for the worst-case conditions, that is, θJA is
specified for device soldered in circuit board for surface-mount
packages.
Table 4. Thermal Resistance
Package Type
24 Lead QSOP
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
θJA
Unit
83
°C/W
Maximum Power Dissipation
The maximum safe power dissipation in the ADA4411-3
package is limited by the associated rise in junction temperature
(TJ) on the die. At approximately 15ꢀ°C, which is the glass
transition temperature, the plastic changes its properties.
Even temporarily exceeding this temperature limit may change
the stresses that the package exerts on the die, permanently
shifting the parametric performance of the ADA4411-3.
Exceeding a junction temperature of 15ꢀ°C for an extended
period can result in changes in the silicon devices potentially
causing failure.
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
Figure 2. Maximum Power Dissipation vs. Temperature for a 4-Layer Board
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
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