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參數資料
型號: THS4281DR
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
封裝: GREEN, PLASTIC, SOIC-8
文件頁數: 10/37頁
文件大小: 1063K
代理商: THS4281DR
_
+
Rf
2.49 k
49.9
0.1
F 6.8 F
VS
Rg
50-
Source
+
VI
0.1
F 6.8 F
+
+VS
VO
2.49 k
To Load
0
4
8
12
16
20
24
0.1
1
10
100
VS = 3 V
Gain = 10,
RL = 1 k,
VO = 0.1 VPP
RF = 100 k
f Frequency MHz
RF = 1.65 k
and 10 k
Signal
Gain
dB
0
4
8
12
16
20
24
0.1
1
10
100
VS = ±5 V
Gain = 10,
RL = 1 k,
VO = 0.1 VPP
RF = 100 k
f Frequency MHz
RF = 2.5 k
and 10 k
Signal
Gain
dB
SLOS432A – APRIL 2004 – REVISED NOVEMBER 2009
www.ti.com
APPLICATION INFORMATION
HIGH-SPEED OPERATIONAL AMPLIFIERS
The THS4281 is a unity gain stable, rail-to-rail input
and output, voltage-feedback operational amplifier
designed to operate from a single 2.7-V to 16.5-V
power supply.
Applications Section Contents
Wideband, Noninverting Operation
Wideband, Inverting Gain Operation
Video Drive Circuits
Single-Supply Operation
Power-Supply
Decoupling
Techniques
and
Recommendations
Active Filtering with the THS4281
Driving Capacitive Loads
Figure 68. Wideband, Noninverting Gain
Board Layout
Configuration
Thermal Analysis
Additional Reference Material
Mechanical Package Drawings
WIDEBAND, NONINVERTING OPERATION
Figure 68 shows the noninverting gain configuration
of 2 V/V used to demonstrate the typical performance
curves.
Voltage feedback amplifiers can use a wide range of
resistors values to set their gain with minimal impact
on
frequency
response.
Larger-valued
resistors
decrease loading of the feedback network on the
output of the amplifier, but may cause peaking and
instability. For a gain of +2, feedback resistor values
between 1 k
and 4 k are recommended for most
applications. However, as the gain increases, the use
Figure 69. Signal Gain vs
of even higher feedback resistors can be used to
Frequency, VS = 3 V
conserve power. This is due to the inherent nature of
amplifiers
becoming
more
stable
as
the
gain
increases, at the expense of bandwidth. Figure 69
and Figure 70 show the THS4281 using feedback
resistors of 10 k
and 100 k. Be cautioned that
using such high values with high-speed amplifiers is
not
typically
recommended,
but
under
certain
conditions, such as high gain and good high-speed
printed circuit board (PCB) layout practices, such
resistances can be used.
Figure 70. Signal Gain vs
Frequency, VS = ±5 V
18
Copyright 2004–2009, Texas Instruments Incorporated
Product Folder Link(s): THS4281
相關PDF資料
PDF描述
THS4281D 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
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THS4281DBVTG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO5
THS4281DGKRG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4281DRG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
相關代理商/技術參數
參數描述
THS4281DRG4 功能描述:高速運算放大器 Very Lo-Pwr R-To-R I/O 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
THS4281EVM 功能描述:放大器 IC 開發工具 THS4281 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
THS4302 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDEBAND FIXED-GAIN AMPLIFIER
THS4302EVM 功能描述:放大器 IC 開發工具 THS4302 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
THS4302RGTR 功能描述:高速運算放大器 Wideband Fixed Gain Amplifier 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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