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參數資料
| 型號： | TK15450M |
| 廠商： | TOKO INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數： | 6/15頁 |
| 文件大小： | 389K |
| 代理商： | TK15450M |
TK15450M/L
GC3-H036
Page 14
12-4. Driving Capacitive Loads
If a capacitive load (C
L) is assumed in the measurement
circuit of Figure 9, and the gain is measured, the resulting
frequency characteristic is shown in Figure 10.
500
500
150
75
2pF
CL
Figure 9: Measurement circuit
0pF
5pF
CL=10pF
-4
-2
0
2
4
6
8
10
12
1M
10M
100M
1G
f[Hz]
G
V
[dB]
Figure 10: Frequency characteristics of capacitive load
Therefore, please note that oscillation may occur when a
capacitive load is directly connected to the output
terminal.
12-5. Use as a Buffer Amplifier
The gain of this operational amplifier IC can be changed
with the external parts.
However, if this IC is used as a buffer amplifier (Figure
11), peaking is generated as shown in Figure 12.
500
150
75
Figure 11: Example of using buffer amplifier
-10
-5
0
5
10
15
20
100k
1M
10M
100M
1G
f[Hz]
G
V
[dB]
-270
-180
-90
0
90
180
270
Phase[deg]
Figure 12: Frequency characteristic of buffer amplifier
There is a possibility of oscillation, so please do not use
the amplifier as a buffer.
12-6. Differential Input Signal Swing
Application of this IC as a differential Amplifier is also
possible. One example is shown in Figure 13, with the
waveforms of each terminal shown in Figure 14.
The use of 5.0V single power supply is assumed.
470
470
750
750
100
F
100
F
220
F
0.7Vp-p
2Vp-p out
2pF
VCC
220
F
10k
7.5k
150
Figure 13: Differential input signal application
Figure 14: Waveforms of each terminal
Waveforms are non-inverting input, inverting input and
output from the top.
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