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參數(shù)資料
| 型號： | THS4215DGKR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW-DISTORTION HIGH-SPEED VOLTAGE FEEDBACK AMPLIFIER |
| 中文描述： | 低失真高速電壓反饋型放大器 |
| 文件頁數(shù)： | 23/41頁 |
| 文件大小： | 1591K |
| 代理商： | THS4215DGKR |
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www.ti.com
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+
THS4211
49.9
50
Source
392
3.9 pF
5 V
-5 V
33 pF
V
O
392
57.6
V
I
_
+
THS4211
100
V
O
V
I+
_
+
R
g1
R
f1
100
V
I-
_
+
R
f2
49.9
R
f1
R
g2
R
g2
R
f2
49.9
THS4211
THS4211
A Low-Noise Receiver With the THS4211
V
O
1
2
1
2R
f1
R
g1
V
i
–V
i–
R
f2
R
g2
(1)
THEORY AND GUIDELINES
Distortion Performance
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+
49.9
100
V
O+
V
I+
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+
49.9
100
V
O-
787
392
392
100
V
I-
LINEARITY: DEFINITIONS, TERMINOLOGY,
CIRCUIT TECHNIQUES, AND DESIGN
TRADEOFFS
The THS4211 features execllent distortion perform-
ance for monolithic operational amplifiers. This sec-
tion focuses on the fundamentals of distortion, circuit
techniques for reducing nonlinearity, and methods for
equating distortion of operational amplifiers to desired
linearity specifications in RF receiver chains.
THS4211
THS4215
SLOS400D–SEPTEMBER 2002–REVISED NOVEMBER 2004
Figure 82. A Two-Pole Active Filter With
Two Poles Between 90 MHz and 100 MHz
Figure 84. A High-Speed Instrumentation
Amplifier
A combination of two THS4211 amplifiers can create
a high-speed, low-distortion, low-noise differential re-
ceiver circuit as depicted in Figure 83. With both
amplifiers operating in the noninverting mode of
operation, the circuit presents a high load impedance
to the source. The designer has the option of
controlling the impedance through termination re-
sistors if a matched termination impedance is desired.
The THS4211 provides excellent distortion perform-
ance into a 150-
load. Relative to alternative sol-
utions, it
provides
exceptional
lighter loads, as well as exceptional performance on a
single 5-V supply. Generally, until the fundamental
signal reaches very high frequency or power levels,
the 2
nd
harmonic dominates the total harmonic distor-
tion with a negligible 3
rd
harmonic component. Focus-
ing then on the 2
nd
harmonic, increasing the load
impedance directly improves distortion. The total load
includes the feedback network; in the noninverting
configuration (Figure 75) this is the sum of R
and R
g
,
while in the inverting configuration (Figure 76), only R
f
needs to be included in parallel with the actual load.
performance
into
Figure 83. A High Input Impedance, Low Noise,
Differential Receiver
A modification on this circuit to include a difference
amplifier turns this circuit into a high-speed instru-
mentation amplifier, as shown in Figure 84.
Amplifiers are generally thought of as
linear
devices.
The output of an amplifier is a linearly-scaled version
of the input signal applied to it. However, amplifier
transfer functions are nonlinear. Minimizing amplifier
nonlinearity is a primary design goal in many appli-
cations.
23
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| THS4215DGKRG4 | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| THS4215DGN | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| THS4215DGNG4 | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| THS4215DGNR | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| THS4215DGNRG4 | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed RoHS:否 制造商:Texas Instruments 通道數(shù)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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