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參數(shù)資料
| 型號： | TSH120ICT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO6 |
| 封裝： | LEAD FREE, PLASTIC, SC70, 6 PIN |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 175K |
| 代理商： | TSH120ICT |
TSH120
Power supply considerations
9/13
4
Power supply considerations
Correct power supply bypassing is very important for optimizing performance in the high-
frequency range. A bypass capacitor greater than 10
μF is necessary to minimize the
distortion. For better quality bypassing at higher frequencies, a capacitor of 10nF must be
added as close as possible to the IC pin of VCC.
Figure 20.
Circuit for power supply bypassing
Figure 21 shows the noise supply rejection improvement with bypass capacitors expressed
by:
20 log (
ΔVout / ΔVCC).
Figure 21.
Noise supply rejection
+V
CC
C
LF=10 F
+
C
HF=10nF
TSH120
+V
CC
C
LF=10 F
+
C
HF=10nF
TSH120
10k
100k
1M
10M
100M
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Vcc=+3.3Vdc+0.2Vac
Load=150
Ω
C
LF
=10uF
C
HF
=100nF
Nois
e
s
upply
re
je
ction
(dB)
Frequency (Hz)
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