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HFA1112IP
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 Intersil Corporation |
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
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NC 1
300
-IN 2
300
-
+
8 NC
7 V+
+IN 3
6 OUT
V- 4
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 AV = 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.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000
HFA1112, HFA1112A
Absolute Maximum Ratings
Voltage Between V+ and V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSUPPLY
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC
Thermal Information
Thermal Resistance (Typical, Note 1)
θJA (oC/W) θJC (oC/W)
PDIP Package . . . . . . . . . . . . . . . . . . . 125
N/A
SOIC Package . . . . . . . . . . . . . . . . . . . 170
N/A
Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC
Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC
(SOIC - Lead Tips Only)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications VSUPPLY = ±5V, AV = +1, RL = 100Ω, Unless Otherwise Specified
PARAMETER
TEST CONDITIONS
TEMP (oC)
MIN
INPUT CHARACTERISTICS
Output Offset Voltage
25 -
Full -
Output Offset Voltage Drift
Full -
PSRR
25 39
Full 35
Input Noise Voltage (Note 3)
100kHz
25 -
Non-Inverting Input Noise Current (Note 3) 100kHz
25 -
Non-Inverting Input Bias Current
25 -
Full -
Non-Inverting Input Resistance
25 25
Inverting Input Resistance (Note 2)
25 240
Input Capacitance
25 -
Input Common Mode Range
Full ±2.5
TRANSFER CHARACTERISTICS
Gain
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Gain
AV = +1, VIN = +2V
AV = +2, VIN = +1V
25 0.980
Full 0.975
25 1.96
Full 1.95
DC Non-Linearity (Note 3)
OUTPUT CHARACTERISTICS
AV = +2, ±2V Full Scale
25 -
Output Voltage (Note 3)
AV = -1
25 ±3.0
Full ±2.5
Output Current (Note 3)
RL = 50Ω
25, 85
-40
50
35
Closed Loop Output Impedance
POWER SUPPLY CHARACTERISTICS
DC, AV = +2
25 -
Supply Voltage Range
Full ±4.5
Supply Current (Note 3)
25 -
Full -
AC CHARACTERISTICS
-3dB Bandwidth
(VOUT = 0.2VP-P, Notes 2, 3)
AV = -1
AV = +1
AV = +2
25 450
25 500
25 350
TYP
8
-
10
45
-
9
37
25
-
50
300
2
±2.8
0.990
-
1.98
-
0.02
±3.3
±3.0
60
50
0.3
-
21
-
800
850
550
MAX
25
35
-
-
-
-
-
40
65
-
360
-
-
1.02
1.025
2.04
2.05
-
-
-
-
-
-
±5.5
26
33
-
-
-
UNITS
mV
mV
µV/oC
dB
dB
nV/√Hz
pA/√Hz
µA
µA
kΩ
Ω
pF
V
V/V
V/V
V/V
V/V
%
V
V
mA
mA
Ω
V
mA
mA
MHz
MHz
MHz
2
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