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AD8278ARMZ-R7 数据表(PDF) 7 Page - Analog Devices

部件名 AD8278ARMZ-R7
功能描述  Low Power, Wide Supply Range, Low Cost Difference Amplifier, G = 쩍, 2
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD8278ARMZ-R7 数据表(HTML) 7 Page - Analog Devices

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AD8278
Rev. 0 | Page 7 of 24
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
8-Lead MSOP
135
°C/W
8-Lead SOIC
121
°C/W
MAXIMUM POWER DISSIPATION
The maximum safe power dissipation for the AD8278 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
255075
100
125
AMBIENT TEMERATURE (°C)
TJ MAX = 150°C
MSOP
θJA = 135°C/W
SOIC
θJA = 121°C/W
Figure 2. Maximum Power Dissipation vs. Ambient Temperature
SHORT-CIRCUIT CURRENT
The AD8278 has built-in, short-circuit protection that limits the
output current (see Figure 27 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 27, 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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