EL4430 Intersil Corporation, EL4430 Datasheet - Page 8

• Manufacturer Part Number: EL4430
• Description: op Amp, 80MHz, Video Instrumentation, Unity Gain, Differential to Single-ended
• Manufacturer: Intersil Corporation

where
For instance, the EL4431 draws a maximum of 16mA and we
might require a 2V peak output into 150Ω and a
270Ω + 270Ω feedback divider.
The R
201mW. The maximum supply voltage that the device can
run on for a given P
The maximum dissipation a package can offer is:
where
The more difficult case is the SO-8 package. With a
maximum die temperature of 150°C and a maximum
ambient temperature of 85°C, the 65°C temperature rise and
package thermal resistance of 170°C/W gives a dissipation
of 382mW at 85°C. This allows a maximum supply voltage of
±8.5V for the EL4431 operated in our example. If an EL4430
were driving a light load (R
±15V supplies at a 70°C maximum ambient.
I
V
V
R
V
P
T
for reliability, less to retain optimum electrical
performance.
T
and 85°C for industrial range.
θ
obtained from datasheet dissipation curves.
S
A
JA
O
J
S
S
D
PAR
, max is the maximum supply current
, max is the maximum die junction temperature, 150°C
, max is the ambient temperature, 70°C for commercial
, max = (P
, max = (T
is the ± supply voltage (assumed equal)
is the output voltage
PAR
is the thermal resistance of the mounted package,
is the parallel of all resistors loading the output
is 117Ω. The dissipation with ±5V supplies is
J
D
, max - T
+ V
D
O
and the other parameter is:
2/R
A
PAR
PAR
max)/θ
)/(2I
8
→∞), it could operate on
JA
S
+ V
O
/R
PAR
)
EL4430, EL4431
Output Loading
The output stage of the instrumentation amplifiers is very
powerful. It typically can source 80mA and sink 120mA. Of
course, this is too much current to sustain and the part will
eventually be destroyed by excessive dissipation or by metal
traces on the die opening. The metal traces are completely
reliable while delivering the 30mA continuous output given in
the Absolute Maximum Ratings table in this datasheet, or
higher purely transient currents.
Gain or gain accuracy degrades only 10% from no load to
100Ω load. Heavy resistive loading will degrade frequency
response and video distortion for loads <100Ω.
Capacitive loads will cause peaking in the frequency
response. If capacitive loads must be driven, a small-valued
series resistor can be used to isolate it (12Ω to 51Ω should
suffice). A 22Ω series resistor will limit peaking to 2.5dB with
even a 220pF load.