1
®
FN2992.8
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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HFA1112
850MHz, Low Distortion Programmable
Gain Buffer Amplifiers
The HFA1112 is a closed loop Buffer featuring user
programmable gain and ultra high speed performance.
Manufactured on Intersil’s proprietary complementary
bipolar UHF-1 process, these devices offer a wide -3dB
bandwidth of 850MHz, very fast slew rate, excellent gain
flatness, low distortion and high output current.
A unique feature of the pinout allows the user to select a
voltage gain of +1, -1, or +2, without the use of any external
components. Gain selection is accomplished via
connections to the inputs, as described in the “Application
Information” section. The result is a more flexible product,
fewer part types in inventory, and more efficient use of board
space.
Compatibility with existing op amp pinouts provides flexibility
to upgrade low gain amplifiers, while decreasing component
count. Unlike most buffers, the standard pinout provides an
upgrade path should a higher closed loop gain be needed at
a future date.
This amplifier is available with programmable output limiting
as the HFA1113. For applications requiring a standard buffer
pinout, please refer to the HFA1110 data sheet.
HFA1112 (PDIP, SOIC)
TOP VIEW
Features
• User Programmable for Closed-Loop Gains of +1, -1 or +2
without Use of External Resistors
• Wide -3dB Bandwidth. . . . . . . . . . . . . . . . . . . . . . 850MHz
• Very Fast Slew Rate. . . . . . . . . . . . . . . . . . . . . . 2400V/µs
• Fast Settling Time (0.1%). . . . . . . . . . . . . . . . . . . . . 11ns
• High Output Current. . . . . . . . . . . . . . . . . . . . . . . . . 60mA
• Excellent Gain Accuracy . . . . . . . . . . . . . . . . . . . 0.99V/V
• Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . . . . <10ns
• Standard Operational Amplifier Pinout
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• RF/IF Processors
• Driving Flash A/D Converters
• High-Speed Communications
• Impedance Transformation
• Line Driving
• Video Switching and Routing
• Radar Systems
• Medical Imaging Systems
• Related Literature
- AN9507, Video Cable Drivers Save Board Space
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
Pin Descriptions
NAME PIN NUMBER DESCRIPTION
NC 1, 5, 8 No Connection
-IN 2 Inverting Input
+IN 3 Non-Inverting Input
V- 4 Negative Supply
OUT 6 Output
V+ 7 Positive Supply
NC
-IN
+IN
V-
1
2
3
4
8
7
6
5
NC
V+
OUT
NC
+
300
300
-
Ordering Information
PART NUMBER
(BRAND)
TEMP.
RANGE (°C) PACKAGE
PKG.
DWG. #
HFA1112IP -40 to 85 8 Ld PDIP E8.3
HFA1112IB
(1112IB)
-40 to 85 8 Ld SOIC M8.15
HFA1112IB96
(1112IB)
8 Ld SOIC Tape and Reel M8.15
HFA1112IBZ
(1112IBZ) (Note)
-40 to 85 8 Ld SOIC
(Pb-free)
M8.15
HFA1112IBZ96
(1112IBZ) (Note)
8 Ld SOIC Tape and Reel
(Pb-free)
M8.15
HFA11XXEVAL High Speed Op Amp DIP Evaluation Board
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate termination finish,
which are RoHS compliant and compatible with both SnPb and Pb-free soldering
operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
Data Sheet July 27, 2005
