
1
HFA1100
850MHz, Low Distortion Current Feedback 
Operational Amplifiers
The HFA1100 is a high-speed, wideband, fast settling 
current feedback amplifier built with Intersil's proprietary 
complementary bipolar UHF-1 process. It operates with 
single supply voltages as low as 4.5V (see Application 
Information section).
The HFA1100 is a basic op amp with uncommitted pins 1, 5, 
and 8.
This device offers a significant performance improvement 
over the AD811, AD9617/18, the CLC400-409, and the 
EL2070, EL2073, EL2030.
The Op Amps with Fastest Edges
Features
 Low Distortion (30MHz, HD2)  . . . . . . . . . . . . . . . . -56dBc
 -3dB Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . 850MHz
 Very Fast Slew Rate  . . . . . . . . . . . . . . . . . . . . . 2300V/
μ
s
 Fast Settling Time (0.1%). . . . . . . . . . . . . . . . . . . . .  11ns
 Excellent Gain Flatness
- (100MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
±
0.14dB
- (50MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
±
0.04dB
 High Output Current. . . . . . . . . . . . . . . . . . . . . . . . . 60mA
 Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . . . .  <10ns
 Operates with 5V Single Supply (See AN9745)
 Pb-Free Available (RoHS Compliant)
Applications
 Video Switching and Routing
 Pulse and Video Amplifiers
 RF/IF Signal Processing
 Flash A/D Driver
 Medical Imaging Systems
 Related Literature
- AN9420, Current Feedback Theory
- AN9202, HFA11XX Evaluation Fixture
- AN9745, Single 5V Supply Operation
Pinout
HFA1100 (PDIP, SOIC)
TOP VIEW
Ordering Information
PART NUMBER
(BRAND)
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
HFA1100IP
-40 to 85
8 Ld PDIP
E8.3
HFA1100IB
(H1100I)
-40 to 85
8 Ld SOIC
M8.15
HFA1100IB96
(H1100I)
-40 to 85
8 Ld SOIC
Tape and Reel
M8.15
HFA1100IBZ (Note)
(H1100I)
-40 to 85
8 Ld SOIC (Pb-free) M8.15
HFA1100IBZ96 (Note)
(H1100I)
-40 to 85
8 Ld SOIC
Tape and Reel 
(Pb-free)
M8.15
HFA11XXEVAL
DIP Evaluation Board for High-Speed Op 
Amps
NOTE: Intersil Pb-free 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-020C.
INPUT
220MHz
SIGNAL
OUTPUT
(A
V
 = 2)
HFA1100
OP AMP
0ns
25ns
NC
-IN
+IN
V-
1
2
3
4
8
7
6
5
NC
V+
OUT
NC
-
+
Data Sheet
October 26, 2004
FN2945.9
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 registered trademark of Intersil Americas Inc.
Copyright  Intersil Americas Inc. 2000, 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.