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參數(shù)資料
| 型號： | 1112IBZ |
| 廠商： | Intersil Corporation |
| 英文描述： | 850MHz, Low Distortion Programmable Gain Buffer Amplifiers |
| 中文描述： | 是850MHz，低失真可編程增益緩沖放大器 |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 488K |
| 代理商： | 1112IBZ |
5
(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 A
V
= +1, R
S
= 50
, C
L
= 30pF, the overall
bandwidth is limited to 300MHz, and bandwidth drops to
100MHz at A
V
= +1, R
S
= 5
, C
L
= 340pF.
Evaluation Board
The performance of the HFA1112 may be evaluated using
the HFA11XX Evaluation Board, slightly modified as follows:
1. Remove the 500
feedback resistor (R
2
), and leave the
connection open.
2. a. For A
V
= +1 evaluation, remove the 500
gain setting
resistor (R
1
), and leave pin 2 floating.
b. For A
V
= +2, replace the 500
gain setting resistor with
a 0
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.
R
S
)
LOAD CAPACITANCE (pF)
50
45
40
35
30
25
20
15
10
5
0
0
40
80
120
160
200
240
280
320
360
400
A
V
= +1
A
V
= +2
FIGURE 1. RECOMMENDED SERIES OUTPUT RESISTOR vs
LOAD CAPACITANCE
1
2
3
4
8
7
6
5
+5V
10
μ
F
0.1
μ
F
V
H
50
GND
GND
R
1
-5V
0.1
μ
F
10
μ
F
50
IN
OUT
V
L
∞
(A
V
= +1)
or 0
(A
V
= +2)
V
H
+IN
V
L
V+
GND
1
V-
OUT
TOP LAYOUT
BOTTOM LAYOUT
FIGURE 2. EVALUATION BOARD SCHEMATIC AND LAYOUT
HFA1112
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