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參數資料
| 型號： | THS4225DRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1 CHANNEL, VIDEO PREAMPLIFIER, PDSO8 |
| 封裝： | GREEN, PLASTIC, SOIC-8 |
| 文件頁數： | 6/38頁 |
| 文件大?。?/td> | 1428K |
| 代理商： | THS4225DRG4 |
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THS4221, THS4225
THS4222, THS4226
SLOS399G AUGUST 2002 REVISED JANUARY 2004
www.ti.com
14
APPLICATION INFORMATION
HIGH-SPEED OPERATIONAL AMPLIFIERS
The THS4222 family of operational amplifiers is a family of
single and dual, rail-to-rail output voltage feedback
amplifiers. The THS4222 family combines both a high
slew rate and a rail-to-rail output stage.
The THS4225 and THS4226 provides a power-down
mode, providing the ability to save power when the
amplifier is inactive. A reference pin is provided to allow the
user the flexibility to control the threshold levels of the
power-down control pin.
Applications Section Contents
D Wideband, Noninverting Operation
D Wideband, Inverting Gain Operation
D Single Supply Operation
D Saving Power With Power-Down Functionality and
Setting Threshold Levels With the Reference Pin
D Power Supply Decoupling Techniques and
Recommendations
D Driving an ADC With the THS4222
D Active Filtering With the THS4222
D An Abbreviated Analysis of Noise in Amplifiers
D Driving Capacitive Loads
D Printed Circuit Board Layout Techniques for Optimal
Performance
D Power Dissipation and Thermal Considerations
D Evaluation Fixtures, Spice Models, and Applications
Support
D Additional Reference Material
D Mechanical Package Drawings
WIDEBAND, NONINVERTING OPERATION
The THS4222 is a family of unity gain stable rail-to-rail
output voltage feedback operational amplifiers, with and
without power-down capability, designed to operate from
a single 3-V to 15-V power supply.
Figure 29 is the noninverting gain configuration of 2 V/V
used to demonstrate the typical performance curves.
Voltage feedback amplifiers, unlike current feedback
designs, can use a wide range of resistors values to set
their gain with minimal impact on their stability and
frequency response. Larger-valued resistors decrease the
loading effect of the feedback network on the output of the
amplifier, but this enhancement comes at the expense of
additional noise and potentially lower bandwidth.
Feedback resistor values between 1 k and 2 k are
recommended for most situations.
_
+
THS4222
Rf
1.3 k
49.9
100 pF
0.1 F 6.8 F
VS
5 V
Rg
50 Source
+
VI
100 pF 0.1 F 6.8 F
+
+VS
5 V
VO
499
1.3 k
Figure 29. Wideband, Noninverting Gain
Configuration
WIDEBAND, INVERTING OPERATION
Since the THS4222 family are general-purpose, wideband
voltage-feedback amplifiers, several familiar operational
amplifier applications circuits are available to the designer.
Figure 30 shows a typical inverting configuration where
the input and output impedances and noise gain from
Figure 29 are retained in an inverting circuit configuration.
Inverting operation is one of the more common
requirements and offers several performance benefits.
The inverting configuration shows improved slew rates
and distortion due to the pseudo-static voltage maintained
on the inverting input.
_
+
THS4222
Rg
1.3 k
RT
649
100 pF
0.1 F
6.8 F
VS
5 V
50 Source
+
VI
100 pF
0.1 F
6.8 F
+
+VS
5 V
VO
CT
0.1 F
Rf
1.3 k
RM
52.3
499
Figure 30. Wideband, Inverting Gain
Configuration
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| THS4271DRBRG4 | 1 CHANNEL, VIDEO PREAMPLIFIER, PDSO8 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| THS4225EVM | 功能描述:放大器 IC 開發工具 THS4225 Eval Mod RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| THS4226 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-DISTORTION, HIGH-SPEED, RAIL-TO-RAIL OUTPUT OPERATIONAL AMPLIFIERS |
| THS4226DGQ | 功能描述:高速運算放大器 Lo-Dist Hi-Speed R-to-R Ouput 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 |
| THS4226DGQG4 | 功能描述:高速運算放大器 Lo-Dist Hi-Speed R-to-R Ouput 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 |
| THS4226DGQR | 功能描述:高速運算放大器 Lo-Dist Hi-Speed R-to-R Ouput 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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