HFA1155IH96 Datasheet PDF - Intersil Corporation
| Part Number | HFA1155IH96 | |
| Description | 380MHz/ SOT-23/ Low Power Current Feedback Operational Amplifier | |
| Manufacturers | Intersil Corporation | |
| Logo |  |
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TM
Data Sheet
HFA1155
June 2000
File Number 4863
380MHz, SOT-23, Low Power Current
Feedback Operational Amplifier
The HFA1155 is a low power, high-speed op amp and is the
most recent addition to Intersil’s HFA1XX5 series of low
power op amps and buffers. Intersil's proprietary
complementary bipolar UHF-1 process, coupled with the
current feedback architecture deliver superb bandwidth even
at very high gains (>250MHz at AV = 10). The excellent
video parameters make this amplifier ideal for professional
video applications.
Though specified for ±5V operation, the HFA1155 operates
with single supply voltages as low as 4.5V, and requires only
1.4mA of ICC in 5V applications (see Application Information
section, and Application Note AN9897).
For a lower distortion, higher bandwidth amplifier in a SOT-
23 package, please refer to the HFA1150 data sheet.
Ordering Information
PART NUMBER
(BRAND)
HFA1155IB
(H1155I)
HFA1155IB96
(H1155I)
HFA1155IH96
(1155)
HFA11XXEVAL
TEMP.
RANGE (oC)
PACKAGE
-40 to 85 8 Ld SOIC
PKG. NO.
M8.15
-40 to 85 8 Ld SOIC
M8.15
Tape and Reel
-40 to 85 5 Ld SOT-23 P5.064
Tape and Reel
DIP Evaluation Board for High-Speed Op
Amps
OPAMPSOT23EVAL SOT-23 Evaluation Board for High-Speed Op
Amps
Pinouts
HFA1155
(SOIC)
TOP VIEW
NC 1
-IN 2
+IN 3
V- 4
-
+
8 NC
7 V+
6 OUT
5 NC
Features
• Low Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5mA
• Low Distortion (10MHz, HD2). . . . . . . . . . . . . . . . . -53dBc
• -3dB Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . 380MHz
• High Slew Rate. . . . . . . . . . . . . . . . . . . . . . . . . . 1700V/µs
• Fast Settling Time (0.1%) . . . . . . . . . . . . . . . . . . . . . 30ns
• Excellent Gain Flatness . . . . . . . . . . . ±0.04dB to 50MHz
• High Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 55mA
• Fast Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . <7ns
• Operates with 5V Single Supply (See AN9897)
Applications
• Video Switching and Routing
• Pulse and Video Amplifiers
• IF Signal Processing
• Flash A/D Driver
• Medical Imaging Systems
• Related Literature
- AN9420, Current Feedback Theory
- AN9897, Single 5V Supply Operation
HFA1155
(SOT23)
TOP VIEW
OUT 1
V- 2
+IN 3
5 V+
4 -IN
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000
|
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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
To order evaluation boards (part number HFA11XXEVAL or
OPAMPSOT23EVAL), please contact your local sales office.
The schematic and layout of the HFA11XXEVAL and
OPAMPSOT23EVAL boards are shown below.
511Ω
511Ω
NC
IN
10µF
1
50Ω 2
3
8 0.1µF
10µF
7
50Ω
6
OUT
+5V
0.1µF
4
-5V
5
GND
NC
GND
FIGURE 2. HFA11XXEVAL SCHEMATIC
HFA11XXEVAL TOP LAYOUT
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.
Examples of good high frequency layouts are the evaluation
boards shown below.
Evaluation Boards
The performance of the HFA1155IB (SOIC) may be
evaluated using the HFA11XX Evaluation Board and a SOIC
to DIP adaptor like the Aries Electronics Part Number
08-350000-10. The SOT-23 version can be evaluated using
the OPAMPSOT23EVAL board.
Note that the feedback and gain setting resistors on both
boards must be changed to the appropriate values listed in
the “Optimum Feedback Resistor” table.
VH
1
+IN
VL V-
V+
GND
HFA11XXEVAL BOTTOM LAYOUT
5
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