Datasheet

10
10k
1M
1G
FREQUENCY (Hz)
-6
0
GAIN (dB)
100M
10M
100k
6
4
-2
-4
2
8
LMH6714, LMH6720
LMH6722, LMH6722-Q1
www.ti.com SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
Figure 40. Design Equations
Figure 41. Equalizer Frequency Response
POWER DISSIPATION
Follow these steps to determine the Maximum power dissipation for the LMH6714/LMH6720/LMH6722:
1. Calculate the quiescent (no load) power: P
AMP
= I
CC
(V
CC
-V
EE
)
2. Calculate the RMS power at the output stage: P
OUT
(RMS) = ((V
CC
- V
OUT
(RMS)) * I
OUT
(RMS)), where V
OUT
and I
OUT
are the voltage and current across the external load.
3. Calculate the total RMS power: P
T
= P
AMP
+ P
OUT
The maximum power that the LMH6714/LMH6720/LMH6722, package can dissipate at a given temperature can
be derived with the following equation:
P
MAX
= (150° - T
A
)/ θ
JA
, where T
A
= Ambient temperature (°C) and θ
JA
= Thermal resistance, from junction to
ambient, for a given package (°C/W). For the SOIC package θ
JA
is 145°C/W, for the 5-pin SOT-23 it is 232°C/W.
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