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AD8279 Scheda tecnica(PDF) 7 Page - Analog Devices

Il numero della parte AD8279
Spiegazioni elettronici  Low Power, Wide Supply Range, Low Cost Difference Amplifiers, G = 쩍, 2
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD8279 Scheda tecnica(HTML) 7 Page - Analog Devices

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Preliminary Technical Data
AD8279
Rev. PrA | Page 7 of 18
ABSOLUTE MAXIMUM RATINGS
Table 6.
Parameter
Rating
Supply Voltage
±18 V
Maximum Voltage at Any Input Pin
−VS + 40 V
Minimum Voltage at Any Input Pin
+VS − 40 V
Storage Temperature Range
−65°C to +150°C
Specified Temperature Range
−40°C to +85°C
Package Glass Transition Temperature (TG)
150°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.
THERMAL RESISTANCE
The θJA values in Table 7 assume a 4-layer JEDEC standard
board with zero airflow.
Table 7. Thermal Resistance
Package Type
θJA
Unit
14-Lead SOIC
105
°C/W
MAXIMUM POWER DISSIPATION
The maximum safe power dissipation for the AD8279 is limited
by the associated rise in junction temperature (TJ) on the die. At
approximately 150°C, which is the glass transition temperature,
the properties of the plastic change. Even temporarily exceeding
this temperature limit may change the stresses that the package
exerts on the die, permanently shifting the parametric performance
of the amplifiers. Exceeding a temperature of 150°C for an
extended period may result in a loss of functionality.
2.0
1.6
1.2
0.8
0.4
0
–50
0
–25
25
50
75
100
125
AMBIENT TEMERATURE (°C)
TJ MAX = 150°C
8-LEAD MSOP
θJA = 135°C/W
8-LEAD SOIC
θJA = 121°C/W
14-LEAD SOIC
θJA = 105°C/W
Figure 2. Maximum Power Dissipation vs. Ambient Temperature
SHORT-CIRCUIT CURRENT
The AD8279 has built-in, short-circuit protection that limits the
output current (see Figure 26 for more information). While the
short-circuit condition itself does not damage the part, the heat
generated by the condition can cause the part to exceed its
maximum junction temperature, with corresponding negative
effects on reliability. Figure 2 and Figure 26, combined with
knowledge of the supply voltages and ambient temperature of the
part can be used to determine whether a short circuit will cause
the part to exceed its maximum junction temperature.
ESD CAUTION


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