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AD8381AST-REEL датащи(PDF) 4 Page - Analog Devices

номер детали AD8381AST-REEL
подробное описание детали  Fast, High Voltage Drive, 6-Channel Output DecDriverTM Decimating LCD Panel Driver
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD8381AST-REEL датащи(HTML) 4 Page - Analog Devices

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REV. 0
AD8381
–4–
ABSOLUTE MAXIMUM RATINGS
1
Supply Voltages
AVCCx – AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 V
DVCC – DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Input Voltages
Maximum Digital Input Voltages . . . . . . . . DVCC + 0.5 V
Minimum Digital Input Voltages . . . . . . . . DGND – 0.5 V
Maximum Analog Input Voltages . . . . . . . . . AVCC + 0.5 V
Minimum Analog Input Voltages . . . . . . . . AGND – 0.5 V
Internal Power Dissipation
2
LQFP Package @ 25
°C Ambient . . . . . . . . . . . . . . . . 2.7 W
Output Short Circuit Duration . . . . . . . . . . . . . . . . . . Infinite
Operating Temperature Range . . . . . . . . . . . . . . 0
°C to 85°C
Storage Temperature Range . . . . . . . . . . . . –65
°C to +125°C
Lead Temperature Range (Soldering 10 sec) . . . . . . . . 300
°C
NOTES
1Stresses above those listed under the 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 the absolute
maximum ratings for extended periods may reduce device reliability.
248-lead LQFP Package:
θ
JA = 45
°C/W (Still Air, 4-Layer PCB)
θ
JC = 19
°C/W
Overload Protection
The AD8381 employs a two-stage overload protection circuit
that consists of an output current limiter and a thermal shutdown.
The maximum current at any one output of the AD8381 is
internally limited to 100 mA average. In the event of a momen-
tary short-circuit between a video output and a power supply rail
(VCC or AGND), the output current limit is sufficiently low to
provide temporary protection.
The thermal shutdown “debiases” the output amplifier when the
junction temperature reaches the internally set trip point. In the
event of an extended short-circuit between a video output and a
power supply rail, the output amplifier current continues to
switch between 0 mA and 100 mA typ with a period determined by
the thermal time constant and the hysteresis of the thermal trip
point. The thermal shutdown provides long term protection by
limiting the average junction temperature to a safe level.
Recovery from a momentary short-circuit is fast, approximately
100 ns. Recovery from a thermal shutdown is slow and is
dependent on the ambient temperature.
MAXIMUM POWER DISSIPATION
The maximum power that can be safely dissipated by the AD8381
is limited by its junction temperature. The maximum safe junc-
tion temperature for plastic encapsulated devices is determined
by the glass transition temperature of the plastic, approximately
150
°C. Exceeding this limit temporarily may cause a shift in the
parametric performance due to a change in the stresses exerted
on the die by the package. Exceeding a junction temperature of
175
°C for an extended period can result in device failure.
To ensure proper operation within the specified operating tem-
perature range, it is necessary to limit the maximum power
dissipation as follows:
PDMAX = (TJMAX – TA)/
θ
JA
where
TJMAX = 150
°C.
AMBIENT TEMPERATURE – C
3.5
0
3.0
2.5
2.0
1.5
1.0
0.5
10
20
30
40
50
60
70
80
90
Figure 4. Maximum Power Dissipation vs. Temperature
ORDERING GUIDE
Temperature
Package
Package
Model
Range
Description
Option
AD8381AST
0
°C to 85°C
48-Lead LQFP
ST-48
AD8381AST-REEL
Reel
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
the AD8381 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.
WARNING!
ESD SENSITIVE DEVICE


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