AD815 Просмотр технического описания (PDF) - Analog Devices

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AD815

High Output Current Differential Driver

Analog Devices 

AD815

ABSOLUTE MAXIMUM RATINGS1

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V Total

Internal Power Dissipation2

Plastic (Y and VR) . . 3.05 Watts (Observe Derating Curves)

Small Outline (RB) . . 2.4 Watts (Observe Derating Curves)

Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . . ± VS

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . ± 6 V

Output Short Circuit Duration

. . . . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves

Can Only Short to Ground

Storage Temperature Range

Y, VR and RB Package . . . . . . . . . . . . . . . –65°C to +125°C

Operating Temperature Range

AD815A . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°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 with 0 ft/min air flow: 15-Lead Through-Hole

and Surface Mount: θJA = 41°C/W; 24-Lead Surface Mount: θJA = 52°C/W.

PIN CONFIGURATION

24-Lead Thermally-Enhanced SOIC (RB-24)

NC 1

24 NC

NC 2

23 NC

NC 3

22 NC

NC 4

21 NC

THERMAL

HEAT TABS

+VS*

5

20

AD815

6 TOP VIEW 19

7 (Not to Scale) 18

8

17

THERMAL

HEAT TABS

+VS*

+IN1 9

16 +IN2

–IN1 10

15 –IN2

OUT1 11

14 OUT2

–VS 12

13 +VS

NC = NO CONNECT

*HEAT TABS ARE CONNECTED TO THE POSITIVE SUPPLY.

MAXIMUM POWER DISSIPATION

The maximum power that can be safely dissipated by the AD815

is limited by the associated rise in junction temperature. The

maximum safe junction temperature for the plastic encapsulated

parts is determined by the glass transition temperature of the

plastic, about 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 junction

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

device failure.

The AD815 has thermal shutdown protection, which guarantees

that the maximum junction temperature of the die remains below a

safe level, even when the output is shorted to ground. Shorting

the output to either power supply will result in device failure.

To ensure proper operation, it is important to observe the

derating curves and refer to the section on power considerations.

It must also be noted that in high (noninverting) gain configurations

(with low values of gain resistor), a high level of input overdrive

can result in a large input error current, which may result in a

significant power dissipation in the input stage. This power

must be included when computing the junction temperature rise

due to total internal power.

14

TJ = 150؇C

13

12

θJA = 16؇C/W

11

SOLDERED DOWN TO

10

COPPER HEAT SINK

(STILL AIR = 0FT/MIN)

9

AD815 AVR, AY

8

7

θJA = 41؇C/W

6

(STILL AIR = 0FT/MIN)

5

NO HEAT SINK

4

AD815 AVR, AY

3

2 θJA = 52؇C/W

(STILL AIR = 0 FT/MIN)

1 NO HEAT SINK

AD815ARB-24

0

–50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90

AMBIENT TEMPERATURE – ؇C

Plot of Maximum Power Dissipation vs. Temperature

Model

AD815ARB-24

AD815ARB-24-REEL

AD815AVR

AD815AY

AD815AYS

AD815-EB

Temperature Range

–40°C to +85°C

–40°C to +85°C

–40°C to +85°C

–40°C to +85°C

–40°C to +85°C

ORDERING GUIDE

Package Description

24-Lead Thermally Enhanced SOIC

24-Lead Thermally Enhanced SOIC

15-Lead Surface Mount DDPAK

15-Lead Through-Hole SIP with Staggered Leads and 90° Lead Form

15-Lead Through-Hole SIP with Staggered Leads and Straight Lead Form

Evaluation Board

Package Option

RB-24

RB-24

VR-15

Y-15

YS-15

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 AD815 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

REV. B

–3–

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