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
2
Absolute Maximum Ratings Thermal Information
Voltage Between V+ and V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
SUPPLY
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 85
o
C
Thermal Resistance (Typical, Note 1) θ
JA
(
o
C/W) θ
JC
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . 125 N/A
SOIC Package . . . . . . . . . . . . . . . . . . . 170 N/A
Maximum Junction Temperature (Plastic Package) . . . . . . . .150
o
C
Maximum Storage Temperature Range. . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300
o
C
(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. θ
JA
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 V
SUPPLY
= ±5V, A
V
= +1, R
L
= 100, Unless Otherwise Specified
PARAMETER TEST CONDITIONS TEMP (
o
C) MIN TYP MAX UNITS
INPUT CHARACTERISTICS
Output Offset Voltage 25 - 8 25 mV
Full - - 35 mV
Output Offset Voltage Drift Full - 10 - µV/
o
C
PSRR 25 39 45 - dB
Full 35 - - dB
Input Noise Voltage (Note 3) 100kHz 25 - 9 - nV/Hz
Non-Inverting Input Noise Current (Note 3) 100kHz 25 - 37 - pA/Hz
Non-Inverting Input Bias Current 25 - 25 40 µA
Full - - 65 µA
Non-Inverting Input Resistance 25 25 50 - k
Inverting Input Resistance (Note 2) 25 240 300 360
Input Capacitance 25 - 2 - pF
Input Common Mode Range Full ±2.5 ±2.8 - V
TRANSFER CHARACTERISTICS
Gain A
V
= +1, V
IN
= +2V 25 0.980 0.990 1.02 V/V
Full 0.975 - 1.025 V/V
Gain A
V
= +2, V
IN
= +1V 25 1.96 1.98 2.04 V/V
Full 1.95 - 2.05 V/V
DC Non-Linearity (Note 3) A
V
= +2, ±2V Full Scale 25 - 0.02 - %
OUTPUT CHARACTERISTICS
Output Voltage (Note 3) A
V
= -1 25 ±3.0 ±3.3 - V
Full ±2.5 ±3.0 - V
Output Current (Note 3) R
L
= 50 25, 85 50 60 - mA
-40 35 50 - mA
Closed Loop Output Impedance DC, A
V
= +2 25 - 0.3 -
POWER SUPPLY CHARACTERISTICS
Supply Voltage Range Full ±4.5 - ±5.5 V
Supply Current (Note 3) 25 - 21 26 mA
Full - - 33 mA
AC CHARACTERISTICS
-3dB Bandwidth
(V
OUT
= 0.2V
P-P
, Notes 2, 3)
A
V
= -1 25 450 800 - MHz
A
V
= +1 25 500 850 - MHz
A
V
= +2 25 350 550 - MHz
HFA1112
3
Slew Rate
(V
OUT
= 5V
P-P
, Note 2)
A
V
= -1 25 1500 2400 - V/µs
A
V
= +1 25 800 1500 - V/µs
A
V
= +2 25 1100 1900 - V/µs
Full Power Bandwidth
(V
OUT
= 5V
P-P
, Note 3)
A
V
= -1 25 - 300 - MHz
A
V
= +1 25 - 150 - MHz
A
V
= +2 25 - 220 - MHz
Gain Flatness
(to 30MHz, Notes 2, 3)
A
V
= -1 25 - ±0.02 - dB
A
V
= +1 25 - ±0.1 - dB
A
V
= +2 25 - ±0.015 ±0.04 dB
Gain Flatness
(to 50MHz, Notes 2, 3)
A
V
= -1 25 - ±0.05 - dB
A
V
= +1 25 - ±0.2 - dB
A
V
= +2 25 - ±0.036 ±0.08 dB
Gain Flatness
(to 100MHz, Notes 2, 3)
A
V
= -1 25 - ±0.10 - dB
A
V
= +2 25 - ±0.07 ±0.22 dB
Linear Phase Deviation
(to 100MHz, Note 3)
A
V
= -1 25 - ±0.13 - Degrees
A
V
= +1 25 - ±0.83 - Degrees
A
V
= +2 25 - ±0.05 - Degrees
2nd Harmonic Distortion
(30MHz, V
OUT
= 2V
P-P
, Notes 2, 3)
A
V
= -1 25 - -52 - dBc
A
V
= +1 25 - -57 - dBc
A
V
= +2 25 - -52 -45 dBc
3rd Harmonic Distortion
(30MHz, V
OUT
= 2V
P-P
, Notes 2, 3)
A
V
= -1 25 - -71 - dBc
A
V
= +1 25 - -73 - dBc
A
V
= +2 25 - -72 -65 dBc
2nd Harmonic Distortion
(50MHz, V
OUT
= 2V
P-P
, Notes 2, 3)
A
V
= -1 25 - -47 - dBc
A
V
= +1 25 - -53 - dBc
A
V
= +2 25 - -47 -40 dBc
3rd Harmonic Distortion
(50MHz, V
OUT
= 2V
P-P
, Notes 2, 3)
A
V
= -1 25 - -63 - dBc
A
V
= +1 25 - -68 - dBc
A
V
= +2 25 - -65 -55 dBc
2nd Harmonic Distortion
(100MHz, V
OUT
= 2V
P-P
, Notes 2, 3)
A
V
= -1 25 - -41 - dBc
A
V
= +1 25 - -50 - dBc
A
V
= +2 25 - -42 -35 dBc
3rd Harmonic Distortion
(100MHz, V
OUT
= 2V
P-P
, Notes 2, 3)
A
V
= -1 25 - -55 - dBc
A
V
= +1 25 - -49 - dBc
A
V
= +2 25 - -62 -45 dBc
3rd Order Intercept
(A
V
= +2, Note 3)
100MHz 25 - 28 - dBm
300MHz 25 - 13 - dBm
1dB Compression
(A
V
= +2, Note 3)
100MHz 25 - 19 - dBm
300MHz 25 - 12 - dBm
Reverse Isolation
(S
12
, Note 3)
40MHz 25 - -70 - dB
100MHz 25 - -60 - dB
600MHz 25 - -32 - dB
TRANSIENT CHARACTERISTICS
Rise Time
(V
OUT
= 0.5V Step, Note 2)
A
V
= -1 25 - 500 800 ps
A
V
= +1 25 - 480 750 ps
A
V
= +2 25 - 700 1000 ps
Electrical Specifications V
SUPPLY
= ±5V, A
V
= +1, R
L
= 100, Unless Otherwise Specified (Continued)
PARAMETER TEST CONDITIONS TEMP (
o
C) MIN TYP MAX UNITS
HFA1112

HFA1112IB

Mfr. #:
Manufacturer:
Renesas / Intersil
Description:
IC BUFFER 1 CIRCUIT 8SOIC
Lifecycle:
New from this manufacturer.
Delivery:
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