HFA1155IH96 Intersil, HFA1155IH96 Datasheet - Page 5

• Manufacturer Part Number: HFA1155IH96
• Description: IC OPAMP CFA 380MHZ LP SOT23-5
• Manufacturer: Intersil

Specifications of HFA1155IH96

• Applications: Current Feedback
• Number Of Circuits: 1
• -3db Bandwidth: 365MHz
• Slew Rate: 1650 V/µs
• Current - Supply: 5.5mA
• Current - Output / Channel: 55mA
• Voltage - Supply, Single/dual (±): 4.5 V ~ 11 V, ±2.25 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: SC-74A, SOT-753
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Typical Performance Curves
FIGURE 1. RECOMMENDED SERIES OUTPUT RESISTOR vs
-100
-150
-200
200
150
100
-50
50
50
40
30
20
10
0
0
A
0
FIGURE 2. SMALL SIGNAL PULSE RESPONSE
V
= +1
50
LOAD CAPACITANCE
100
LOAD CAPACITANCE (pF)
150
TIME (5ns/DIV.)
5
200
250
300
V
R
SUPPLY
L
= 100Ω, Unless Otherwise Specified
350
A
V
= +2
= ±5V, R
400
HFA1155
F
= Value From the “Optimum Feedback Resistor” Table, T
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.
-0.5
-1.0
-1.5
-2.0
2.0
1.5
1.0
0.5
0
A
FIGURE 3. LARGE SIGNAL PULSE RESPONSE
V
= +1
TIME (5ns/DIV.)
A
= 25
o
C,