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參數資料
| 型號： | THS4021EVM |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| 中文描述： | 350 - MHz的低噪聲高速放大器 |
| 文件頁數： | 12/22頁 |
| 文件大?。?/td> | 366K |
| 代理商： | THS4021EVM |
THS4021, THS4022
350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS
SLOS265B – SEPTEMBER 1999 – REVISED FEBRUARY 2000
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
driving a capacitive load
Driving capacitive loads with high performance amplifiers is not a problem as long as certain precautions are
taken. The first is to realize that the THS402x has been internally compensated to maximize its bandwidth and
slew rate performance. When the amplifier is compensated in this manner, capacitive loading directly on the
output will decrease the device’s phase margin leading to high frequency ringing or oscillations. Therefore, for
capacitive loads of greater than 10 pF, it is recommended that a resistor be placed in series with the output of
the amplifier, as shown in Figure 33. A minimum value of 20
should work well for most applications. For
example, in 75-
transmission systems, setting the series resistor value to 75
both isolates any capacitance
loading and provides the proper line impedance matching at the source end.
+
_
THS402x
CLOAD
1 k
Input
Output
50
20
Figure 33. Driving a Capacitive Load
offset nulling
The THS402x has very low input offset voltage for a high-speed amplifier. However, if additional correction is
required, an offset nulling function has been provided on the THS4021. The input offset can be adjusted by
placing a potentiometer between terminals 1 and 8 of the device and tying the wiper to the negative supply. This
is shown in Figure 34.
_
+
THS402x
VCC–
VCC+
0.1
μ
F
0.1
μ
F
10 k
Figure 34. Offset Nulling Schematic
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| THS4022D | 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4022DGN | 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4022EVM | 350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| THS4031D | 100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| THS4021ID | 功能描述:高速運算放大器 350MHz RoHS:否 制造商:Texas Instruments 通道數量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| THS4021IDG4 | 功能描述:高速運算放大器 Ultra-Low Noise Voltage-Feedback RoHS:否 制造商:Texas Instruments 通道數量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| THS4021IDGN | 功能描述:高速運算放大器 Ultra-Low Noise Voltage-Feedback RoHS:否 制造商:Texas Instruments 通道數量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| THS4021IDGNG4 | 功能描述:高速運算放大器 Ultra-Low Noise Voltage-Feedback RoHS:否 制造商:Texas Instruments 通道數量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| THS4021IDGNR | 功能描述:高速運算放大器 Ultra-Low Noise Voltage-Feedback RoHS:否 制造商:Texas Instruments 通道數量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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