HFA1155IH96(2004) 데이터 시트보기 (PDF) - Intersil
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HFA1155IH96 Datasheet PDF : 10 Pages
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HFA1155
50
AV = +2
40
30
20
10
0
0
50 100 150 200 250 300 350 400
LOAD CAPACITANCE (pF)
FIGURE 1. RECOMMENDED SERIES OUTPUT RESISTOR vs
LOAD CAPACITANCE
PC Board Layout
The frequency response of this amplifier depends greatly on
the amount of care taken in designing the PC board. The
use of low inductance components such as chip
resistors and chip capacitors is strongly recommended,
while a solid ground plane is a must!
Attention should be given to decoupling the power supplies.
A large value (10μF) tantalum in parallel with a small value
chip (0.1μF) capacitor works well in most cases.
Terminated microstrip signal lines are recommended at the
input and output of the device. Output capacitance, such as
that resulting from an improperly terminated transmission
line, will degrade the frequency response of the amplifier
and may cause oscillations. In most cases, the oscillation
can be avoided by placing a resistor in series with the
output.
Care must also be taken to minimize the capacitance to ground
seen by the amplifier’s inverting input. The larger this
capacitance, the worse the gain peaking, resulting in pulse
overshoot and eventual instability. To reduce this capacitance,
remove the ground plane under traces connected to -IN and
keep these traces as short as possible.
Typical Performance Curves VSUPPLY = ±5V, RF = Value From the “Optimum Feedback Resistor” Table, TA = 25oC,
RL = 100Ω, Unless Otherwise Specified
200
AV = +1
150
100
50
0
-50
-100
-150
-200
TIME (5ns/DIV.)
FIGURE 2. SMALL SIGNAL PULSE RESPONSE
2.0
AV = +1
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
TIME (5ns/DIV.)
FIGURE 3. LARGE SIGNAL PULSE RESPONSE
5
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