參數(shù)資料
型號(hào)： THS4271DRBR
廠商： Texas Instruments, Inc.
元件分類(lèi)： 運(yùn)動(dòng)控制電子
英文描述： LOW NOISE, HIGH SLEW RATE, UNITY GAIN STABLE VOLTAGE FREEBACK AMPLIFIER
中文描述： 低噪聲，高擺率，單位增益穩(wěn)定電壓留言反饋放大器
文件頁(yè)數(shù)： 18/38頁(yè)
文件大?。?/td> 1055K
代理商： THS4271DRBR
SLOS397E JULY 2002 REVISED JANUARY 2004
www.ti.com
18
APPLICATION INFORMATION
HIGH-SPEED OPERATIONAL AMPLIFIERS
The THS4271 and the THS4275 operational amplifiers set
new performance levels, combining low distortion, high
slew rates, low noise, and a unity-gain bandwidth in
excess of 1 GHz. To achieve the full performance of the
amplifier, careful attention must be paid to printed-circuit
board layout and component selection.
The THS4275 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
Wideband, Noninverting Operation
Wideband, Inverting Gain Operation
Single Supply Operation
Saving Power With Power-Down Functionality and
Setting Threshold Levels With the Reference Pin
Power Supply Decoupling Techniques and
Recommendations
Using the THS4271 as a DAC Output Buffer
Driving an ADC With the THS4271
Active Filtering With the THS4271
Building a Low-Noise Receiver With the THS4271
Linearity: Definitions, Terminology, Circuit
Techniques and Design Tradeoffs
An Abbreviated Analysis of Noise in Amplifiers
Driving Capacitive Loads
Printed Circuit Board Layout Techniques for Optimal
Performance
Power Dissipation and Thermal Considerations
Performance vs Package Options
Evaluation Fixtures, Spice Models, and Applications
Support
Additional Reference Material
Mechanical Package Drawings
WIDEBAND, NONINVERTING OPERATION
The THS4271 and the THS4275 are unity gain stable
1.4-GHz voltage feedback operational amplifiers, with and
without power-down capability, designed to operate from
a single 5-V to 15-V power supply.
Figure 75 is the noninverting gain configuration of 2 V/V
used to demonstrate the typical performance curves. Most
of the curves were characterized using signal sources with
50-
source impedance, and with measurement
equipment presenting a 50-
load impedance. In
Figure 75, the 49.9-
shunt resistor at the V
IN
terminal
matches the source impedance of the test generator. The
total 499-
load at the output, combined with the 498-
total feedback network load, presents the THS4271 and
THS4275 with an effective output load of 249
for the
circuit of Figure 75.
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 249
and 1 k
are
recommended for most situations.
+
THS4271
Rf
249
49.9
100 pF
0.1
μ
F
6.8
μ
F
+
VS
5 V
Rg
50
Source
VI
100 pF
0.1
μ
F
6.8
μ
F
+
+VS
5 V
VO
499
249
Figure 75. Wideband, Noninverting Gain
Configuration
WIDEBAND, INVERTING GAIN OPERATION
Since the THS4271 and THS4275 are general-purpose,
wideband voltage-feedback amplifiers, several familiar
operational amplifier applications circuits are available to
the designer. Figure 76 shows a typical inverting
configuration where the input and output impedances and
noise gain from Figure 75 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.
相關(guān)PDF資料
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THS4275DGNR LOW NOISE, HIGH SLEW RATE, UNITY GAIN STABLE VOLTAGE FREEBACK AMPLIFIER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS4271DRBRG4 功能描述:高速運(yùn)算放大器 Super-Fast Ultra-Low Distortion RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4271DRBT 功能描述:高速運(yùn)算放大器 Super-Fast Ultra-Low Distortion RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4271DRBTG4 功能描述:高速運(yùn)算放大器 Super-Fast Ultra-Low Distortion RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4271DRG4 功能描述:高速運(yùn)算放大器 Super-Fast Ultra-Low Distortion RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4271-EP 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:LOW NOISE, HIGH SLEW RATE, UNITY GAIN STABLE VOLTAGE FEEDBACK AMPLIFIER
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