LT1355 Linear Technology, LT1355 Datasheet - Page 11

• Manufacturer Part Number: LT1355
• Description: Dual and Quad 12MHz/ 400V/us Op Amps
• Manufacturer: Linear Technology

APPLICATIONS
Power Dissipation
The LT1355/LT1356 combine high speed and large output
drive in small packages. Because of the wide supply
voltage range, it is possible to exceed the maximum
junction temperature under certain conditions. Maximum
junction temperature (T
temperature (T
SI PLIFIED
LT1355CN8: T
LT1355CS8: T
LT1356CN:
LT1356CS:
W
–IN
V
V
A
+
–
) and power dissipation (P
T
T
J
J
J
J
U
SCHE ATIC
= T
= T
= T
= T
A
A
A
A
J
) is calculated from the ambient
+ (P
+ (P
INFORMATION
+ (P
+ (P
U
W
D
D
D
D
x 190 C/W)
x 150 C/W)
x 130 C/W)
x 110 C/W)
W
800
R1
D
) as follows:
U
Worst case power dissipation occurs at the maximum
supply current and when the output voltage is at 1/2 of
either supply voltage (or the maximum swing if less than
1/2 supply voltage). For each amplifier P
Example: LT1356 in S16 at 70 C, V
+IN
P
P
T
JMAX
DMAX
DMAX
= 70 C + (4 99.8mW)(150 C/W) = 130 C
C
= (V
= (30V)(1.45mA) + (7.5V)
+
– V
–
R
C
)(I
SMAX
) + (V
LT1355/LT1356
+
C
/2)
C
S
2
/1kW = 99.8mW
2
= 15V, R
/R
1355/1356 SS01
L
DMAX
OUT
is:
L
= 1k
11