AD8250

Data Sheet

Rev. C | Page 6 of 24

ABSOLUTE MAXIMUM RATINGS

Table 3.

Parameter

Rating

Supply Voltage

±17 V

Power Dissipation

See Figure 4

Output Short-Circuit Current

Indefinite1

Common-Mode Input Voltage

Differential Input Voltage

Digital Logic Inputs

Storage Temperature Range

−65°C to +125°C

Operating Temperature Range3

−40°C to +85°C

Lead Temperature (Soldering, 10 sec)

300°C

Junction Temperature

140°C

112°C/W

Package Glass Transition Temperature

140°C

1

Assumes that the load is referenced to midsupply.

2

Current must be kept to less than 6 mA.

3

Temperature for specified performance is −40°C to +85°C. For performance

to 125°C, see the Typical Performance Characteristics section.

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.

MAXIMUM POWER DISSIPATION

The maximum safe power dissipation in the AD8250 package is

the die. The plastic encapsulating the die locally reaches the

junction temperature. At approximately 140°C, which is the

glass transition temperature, the plastic changes its properties.

Even temporarily exceeding this temperature limit can change

the stresses that the package exerts on the die, permanently

shifting the parametric performance of the AD8250. Exceeding

a junction temperature of 140°C for an extended period can

result in changes in silicon devices, potentially causing failure.

The junction temperature is calculated as

quiescent power dissipation and the power dissipated in the

package due to the load drive for all outputs. The quiescent

The difference between the total drive power and the load

power is the drive power dissipated in the package.

(

)

L

OUT

L

OUT

S

S

S

D

R

V

R

V

V

I

V

P

2

–

2













×

+

×

=

addition, more metal directly in contact with the package leads

from metal traces, through holes, ground, and power planes

Figure 4 shows the maximum safe power dissipation in the

package vs. the ambient temperature on a four-layer JEDEC

standard board.

2.00

1.75

1.50

1.25

1.00

0.75

0.50

0.25

0

–40

–20

120

100

80

60

40

20

0

AMBIENT TEMPERATURE (°C)

Figure 4. Maximum Power Dissipation vs. Ambient Temperature

ESD CAUTION