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參數資料
| 型號： | TSH344IDT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件頁數： | 4/17頁 |
| 文件大小： | 296K |
| 代理商： | TSH344IDT |
Application information
TSH344
12/17
3.2
Power supply considerations
Correct power supply bypassing is very important for optimizing performance in low and
high-frequency ranges. Bypass capacitors should be placed as close as possible to the IC
pin (pin 4) to improve high-frequency bypassing. A capacitor (CLF) greater than 100μF is
necessary to improve the PSRR in low frequencies. For better quality bypassing, a capacitor
of 470nF (CHF) is also added as close as possible to the IC pin to improve the PSRR in the
higher frequencies.
Figure 28. Circuit for power supply bypassing
Figure 29 shows how the power supply noise rejection evolves versus frequency depending
on how carefully the power supply decoupling is achieved.
Figure 29. Improvement of power supply noise rejection
+VCC
C
LF
+
C
HF
TSH344
R
G
B
4
5
10k
100k
1M
10M
100M
-80
-70
-60
-50
-40
-30
-20
-10
0
C
LF
=100uF
C
HF
=470nF
without
capacitor
Vcc=5V
Load=150
Ω
PSRR=20 log (
ΔVCC/ΔVout)
PSRR
(dB)
Frequency (Hz)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TSH345 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Triple video buffer with selectable filter for HD and SD video applications |
| TSH345ID | 功能描述:視頻 IC TRP VID BFF SLCT FLT HD/SD VID APPS RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| TSH345IDT | 功能描述:視頻放大器 Triple video buffer w/filter for HD RoHS:否 制造商:ON Semiconductor 通道數量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| TSH345IPT | 功能描述:視頻放大器 Triple video buffer w/filter for HD & SD RoHS:否 制造商:ON Semiconductor 通道數量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| TSH346 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Triple video buffer/filter for HD video applications |
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