HFA1212 查看數據表（PDF） - Intersil
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HFA1212 Datasheet PDF : 10 Pages
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HFA1212
Evaluation Board
The performance of the HFA1212 may be evaluated using
the HA5023 Evaluation Board, slightly modified as follows:
1. Remove the two feedback resistors, and leave the con-
nections open.
2. a. For AV = +1 evaluation, remove the gain setting
resistors (R1), and leave pins 2 and 6 floating.
b. For AV = +2, replace the gain setting resistors (R1) with
0Ω resistors to GND.
3. Replace the 0Ω series output resistors with 50Ω.
The modified schematic for amplifier 1, and the board layout
are shown in Figures 2 and 3.
To order evaluation boards (part number HA5023EVAL),
please contact your local sales office.
OUT
50Ω
1
R 1(NOTE)
2
IN
3
50Ω
4
−5V
10µF
0.1µF
8
+5V
+−
7
6
0.1µF 10µF
5
GND
GND
NOTE: R1 = ∞ (AV = +1)
or 0Ω (AV = +2)
FIGURE 2. MODIFIED EVALUATION BOARD SCHEMATIC
FIGURE 3A. TOP LAYOUT
FIGURE 3B. BOTTOM LAYOUT
FIGURE 3. EVALUATION BOARD LAYOUT
Typical Performance Curves VSUPPLY = ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified
200
AV = +2
150
100
50
0
-50
-100
-150
-200
TIME (5ns/DIV.)
FIGURE 4. SMALL SIGNAL PULSE RESPONSE
2.0
AV = +2
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
TIME (5ns/DIV.)
FIGURE 5. LARGE SIGNAL POSITIVE PULSE RESPONSE
6
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