HFA1112 Datasheet, PDF (1/14 Pages) Intersil Corporation – 850MHz, Low Distortion Programmable Gain Buffer Amplifiers

TM
Data Sheet
HFA1112, HFA1112A
December 2000 File Number 2992.6
850MHz, Low Distortion Programmable
Gain Buffer Amplifiers
The HFA1112/12A are closed loop Buffers 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. The
HFA1112A is a more stable version optimized for unity gain
applications.
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)
HFA1112A (SOIC)
TOP VIEW
NC 1
300
300
-IN 2
-
+
+IN 3
V- 4
8 NC
7 V+
6 OUT
5 NC
Pin Descriptions
NAME
NC
-IN
+IN
V-
OUT
V+
PIN NUMBER
DESCRIPTION
1, 5, 8
No Connection
2
Inverting Input
3
Non-Inverting Input
4
Negative Supply
6
Output
7
Positive Supply
Features
• User Programmable for Closed-Loop Gains of +1, -1 or +2
without Use of External Resistors
• HFA1112A Optimized for A_V = 1 Applications
• 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
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)”
Ordering Information
PART NUMBER
(BRAND)
HFA1112IP
HFA1112IB
(1112I)
TEMP.
RANGE (^oC)
PACKAGE
-40 to 85 8 Ld PDIP
-40 to 85 8 Ld SOIC
PKG.
NO.
E8.3
M8.15
HFA1112AIB
(1112AIB)
HFA11XXEVAL
-40 to 85 8 Ld SOIC
M8.15
High Speed Op Amp DIP Evaluation Board
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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