HFA1115_04 Datasheet, PDF (1/14 Pages) Intersil Corporation – 225MHz, Low Power, Output Limiting, Closed Loop Buffer Amplifier

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July 2004
HFA1115
FN3606.5
225MHz, Low Power, Output
Limiting, Closed Loop Buffer Amplifier
The HFA1115 is a high speed closed loop Buffer featuring both
user programmable gain and output limiting. Manufactured on
Intersil’s proprietary complementary bipolar UHF-1 process, the
HFA1115 also offers a wide -3dB bandwidth of 225MHz, very
fast slew rate, excellent gain flatness and high output current.
This buffer is the ideal choice for high frequency applications
requiring output limiting, especially those needing ultra fast
overload recovery times. The limiting function allows the
designer to set the maximum positive and negative output
levels, thereby protecting later stages from damage or input
saturation. The HFA1115 also allows for voltage gains of +2,
+1, and -1, without the use of external resistors. Gain
selection is accomplished via connections to the inputs, as
described in the “Application Information” text. 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. For Military product, refer to the HFA1115/883
data sheet.
Pinout
HFA1115
(PDIP, SOIC)
TOP VIEW
NC 1
350
350
-IN 2
_
+
+IN 3
V- 4
8 V_H
7 V+
6 OUT
5 V_L
Pin Descriptions
NAME
PIN NUMBER
NC
1
-IN
2
+IN
3
V-
4
V_L
5
OUT
6
V+
7
V_H
8
DESCRIPTION
No Connection
Inverting Input
Non-Inverting Input
Negative Supply
Lower Output Limit
Output
Positive Supply
Upper Output Limit
Features
• User Programmable Output Voltage Limiting
• High Input Impedance . . . . . . . . . . . . . . . . . . . . . . . 1MΩ
• Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.02%
• Differential Phase. . . . . . . . . . . . . . . . . . . . . 0.03 Degrees
• Wide -3dB Bandwidth (A_V = +2) . . . . . . . . . . . . . 225MHz
• Very Fast Slew Rate (A_V = -1) . . . . . . . . . . . . . . 1135V/μs
• Low Supply Current . . . . . . . . . . . . . . . . . . . . . . . . 7.1mA
• High Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 60mA
• Excellent Gain Accuracy . . . . . . . . . . . . . . . . . . . 0.99V/V
• User Programmable For Closed-Loop Gains of +1, -1 or
+2 Without Use of External Resistors
• Fast Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . <1ns
• Standard Operational Amplifier Pinout
Applications
• Flash A/D Drivers
• Video Cable Drivers
• High Resolution Monitors
• Professional Video Processing
• Medical Imaging
• Video Digitizing Boards/Systems
• Battery Powered Communications
Part # Information
PART NUMBER
TEMP.
(BRAND)
RANGE (^oC)
PACKAGE
PKG.
NO.
HFA1115IP
-40 to 85 8 Ld PDIP
E8.3
HFA1115IB
(H1115I)
-40 to 85 8 Ld SOIC
M8.15
HFA11XXEVAL 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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Copyright Harris Corporation 1998, Copyright Intersil Americas Inc. 2004. All Rights Reserved