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參數(shù)資料
| 型號： | TSH310ILT |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 400A High-Speed Operational Amplifier |
| 中文描述： | 四樓高速運算放大器 |
| 文件頁數(shù)： | 10/19頁 |
| 文件大?。?/td> | 449K |
| 代理商： | TSH310ILT |
TSH310
Power Supply Considerations
10/19
4 Power Supply Considerations
Correct power supply bypassing is very important for optimizing performance in high-frequency ranges.
Bypass capacitors should be placed as close as possible to the IC pins to improve high-frequency
bypassing. A capacitor greater than 1
μ
F is necessary to minimize the distortion. For better quality
bypassing, a capacitor of 10nF can be added using the same implementation conditions. Bypass
capacitors must be incorporated for both the negative and the positive supply.
For example: on the SO8_SINGLE_HF board, these capacitors are C6, C7, C8, C9.
Single power supply
In the event that a single supply system is used, new biasing is necessary to assume a positive output
dynamic range between 0V and +V
CC
supply rails. Considering the values of V
OH
and V
OL
, the amplifier
will provide an output dynamic from +0.9V to +4.1V on 1k
load.
The amplifier must be biased with a mid-supply (nominally +V
CC
/2), in order to maintain the DC
component of the signal at this value. Several options are possible to provide this bias supply, such as a
virtual ground using an operational amplifier or a two-resistance divider (which is the cheapest solution).
A high resistance value is required to limit the current consumption. On the other hand, the current must
be high enough to bias the non-inverting input of the amplifier. If we consider this bias current (55
μ
A
max.) as the 1% of the current through the resistance divider to keep a stable mid-supply, two resistances
of 470
can be used.
The input provides a high pass filter with a break frequency below 10Hz which is necessary to remove the
original 0 volt DC component of the input signal, and to fix it at +V
CC
/2.
Figure 27
illustrates a 5V single power supply configuration for the SO8_SINGLE evaluation board (see
Evaluation Boards
on page 9).
Figure 26: Circuit for power supply bypassing
+
-V
CC
+V
CC
10microF
+
10nF
+
10nF
-
10microF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TSH31I | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:280MHz BANDWIDTH MOS INPUT SINGLE OPERATIONAL AMPLIFIER |
| TSH31ID | 功能描述:運算放大器 - 運放 Single MOS Input RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TSH31IDT | 功能描述:運算放大器 - 運放 Single MOS Input RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TSH31IN | 功能描述:運算放大器 - 運放 Single MOS Input RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TSH321 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:WIDE BANDWIDTH AND MOS INPUTS SINGLE OPERATIONAL AMPLIFIER |
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