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PDF 1112IP Data sheet ( Hoja de datos )
| Número de pieza | 1112IP | |
| Descripción | HFA1112IP | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 1112IP (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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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
1 page  
HFA1112, HFA1112A
(as illustrated in the curves), the maximum bandwidth is
obtained without sacrificing stability. Even so, bandwidth
does decrease as you move to the right along the curve.
For example, at AV = +1, RS = 50Ω, CL = 30pF, the overall
bandwidth is limited to 300MHz, and bandwidth drops to
100MHz at AV = +1, RS = 5Ω, CL = 340pF.
50
45
40 AV = +1
35
30
25
20
15
10
5
0
AV = +2
0 40 80 120 160 200 240 280
LOAD CAPACITANCE (pF)
320
360 400
FIGURE 1. RECOMMENDED SERIES OUTPUT RESISTOR vs
LOAD CAPACITANCE
Evaluation Board
The performance of the HFA1112 may be evaluated using
the HFA11XX Evaluation Board, slightly modified as follows:
1. Remove the 500Ω feedback resistor (R2), and leave the
connection open.
2. a. For AV = +1 evaluation, remove the 500Ω gain setting
resistor (R1), and leave pin 2 floating.
b. For AV = +2, replace the 500Ω gain setting resistor with
a 0Ω resistor to GND.
The layout and modified schematic of the board are shown
in Figure 2.
To order evaluation boards (part number HFA11XXEVAL),
please contact your local sales office.
∞ (AV = +1)
or 0Ω (AV = +2)
R1 1
50Ω 2
IN 3
10µF 0.1µF
4
-5V
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VH
8 0.1µF
7
50Ω
6
10µF
+5V
OUT
5
GND
VL
GND
TOP LAYOUT
VH
1
+IN
VLOVU- T V+
GND
FIGURE 2. EVALUATION BOARD SCHEMATIC AND LAYOUT
BOTTOM LAYOUT
5
5 Page 
HFA1112, HFA1112A
Typical Performance Curves VSUPPLY = ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued)
60
VOUT = 1V
50
60
VOUT = 2V
50
40 40
AV = +1
30 30 AV = +1
20
10
0
100
AV = +2
AV = -1
300 500 700 900
INPUT RISE TIME (ps)
1100 1300
FIGURE 33. OVERSHOOT vs INPUT RISE TIME
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
5
6 78 9
TOTAL SUPPLY VOLTAGE (V+ - V-, V)
10
www.DataSFhIGeeUtR4UE.c3o5m. SUPPLY CURRENT vs SUPPLY VOLTAGE
20
AV = +2
10
AV = -1
0
100 300 500 700 900 1100 1300
INPUT RISE TIME (ps)
FIGURE 34. OVERSHOOT vs INPUT RISE TIME
25
24
23
22
21
20
19
18
17
16
15
-50 -25
0 25 50 75
TEMPERATURE (oC)
100 125
FIGURE 36. SUPPLY CURRENT vs TEMPERATURE
3.6
AV = -1
3.5
3.4 +VOUT (RL= 50Ω)
3.3 +VOUT (RL= 100Ω)
3.2 |-VOUT| (RL= 100Ω)
3.1
3.0
2.9
2.8 |-VOUT| (RL= 50Ω)
2.7
2.6
-50
-25
0 25 50 75
TEMPERATURE (oC)
100 125
FIGURE 37. OUTPUT VOLTAGE vs TEMPERATURE
50 130
40 110
30 90
20 70
10
0
0.1
ENI
INI
1 10
FREQUENCY (kHz)
50
30
100
FIGURE 38. INPUT NOISE CHARACTERISTICS
11
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