AD8380 Просмотр технического описания (PDF) - Analog Devices

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AD8380

Fast, High-Voltage Drive, 6-Channel Output DecDriver™ Decimating LCD Panel Driver

Analog Devices 

AD8380

ABSOLUTE MAXIMUM RATINGS1

Supply Voltage AVCC–AVEE . . . . . . . . . . . . . . . . . . . . . 26 V

Internal Power Dissipation2

Quad Flat Package (S) . . . . . . . . . . . . . . . . . . . . . . . 1.7 W

Output Short Circuit Duration

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Associated Text

Storage Temperature Range . . . . . . . . . . . . –65°C to +125°C

Operating Temperature Range . . . . . . . . . . . . . . 0°C to 85°C

Lead Temperature Range (Soldering 10 sec) . . . . . . . . . 300°C

NOTES

1Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent 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.

2Specification is for device in free air:

44-Lead MQFP Package: θJA = 73°C/W (Still Air), where PD = (TJ – TA)/θJA.

θJC = 22°C/W.

PIN CONFIGURATION

44 43 42 41 40 39 38 37 36 35 34

NC 1

DB0 2

DB1 3

DB2 4

DB3 5

DB4 6

DB5 7

DB6 8

DB7 9

DB8 10

(MSB) DB9 11

PIN 1

IDENTIFIER

AD8380

TOP VIEW

(Not to Scale)

33 VID0

32 AVCC0,1

31 VID1

30 AVEE1,2

29 VID2

28 AVCC2,3

27 VID3

26 AVEE3,4

25 VID4

24 AVCC4,5

23 VID5

12 13 14 15 16 17 18 19 20 21 22

NC = NO CONNECT

MAXIMUM POWER DISSIPATION

The maximum power that can be safely dissipated by the

AD8380 is limited by the associated rise in junction temperature.

The maximum safe junction 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 parametric performance due to a change in

the stresses exerted on the die by the package. Exceeding a junc-

tion temperature of 175°C for an extended period can result in

device failure.

Output Short Circuit Limit

The AD8380’s internal short circuit limitation is not sufficient to

protect the device in the event of a direct short circuit between a

video output and a power supply voltage rail (VCC or VEE). Tem-

porary short circuits can reduce an output’s ability to source or

sink current and, therefore, impact the device’s ability to drive a

load. Short circuits of extended duration can cause metal lines to

fuse open, rendering the device nonfunctional.

To prevent these problems, it is recommended that a series

resistor of 25 Ω or greater be placed as close as possible to the

AD8380’s video outputs. This will serve to substantially reduce

the magnitude of the fault currents and protect the outputs from

damage caused by intermittent short circuits. This may not be

enough to guarantee that the maximum junction temperature

(150°C) is not exceeded under all conditions. To ensure proper

operation, it is necessary to observe the maximum power derat-

ing curve in Figure 2 below.

3.0

TJ, MAX = 150؇C

2.5

2.0

1.5

1.0

0.5

0 10 20 30 40 50 60 70 80 90

AMBIENT TEMPERATURE – ؇C

Figure 2. Maximum Power Dissipation vs. Temperature

Model

AD8380JS

ORDERING GUIDE

Temperature

Range

0°C to 85°C

Package

Description

44-Lead MQFP

Package

Option

S-44A

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 AD8380 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.

–4–

WARNING!

ESD SENSITIVE DEVICE

REV. B

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