參數(shù)資料
型號： THS4502IDGNDT
廠商： Texas Instruments, Inc.
元件分類： 運(yùn)動控制電子
英文描述： WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS
中文描述： 寬帶，低失真全差動放大器
文件頁數(shù)： 20/40頁
文件大?。?/td> 609K
代理商： THS4502IDGNDT
THS4502
THS4503
SLOS352D
APRIL 2002
REVISED JANUARY 2004
www.ti.com
20
APPLICATION INFORMATION
FULLY DIFFERENTIAL AMPLIFIERS
Differential signaling offers a number of performance
advantages in high-speed analog signal processing
systems, including immunity to external common-mode
noise, suppression of even-order nonlinearities, and
increased dynamic range. Fully differential amplifiers not
only serve as the primary means of providing gain to a
differential signal chain, but also provide a monolithic
solution for converting single-ended signals into
differential signals for easier, higher performance
processing. The THS4500 family of amplifiers contains
products in Texas Instruments
’
expanding line of
high-performance fully differential amplifiers. Information
on fully differential amplifier fundamentals, as well as
implementation specific information, is presented in the
applications section of this data sheet to provide a better
understanding of the operation of the THS4500 family of
devices, and to simplify the design process for designs
using these amplifiers.
Applications Section
Fully Differential Amplifier Terminal Functions
Input Common-Mode Voltage Range and the
THS4500 Family
Choosing the Proper Value for the Feedback and
Gain Resistors
Application Circuits Using Fully Differential
Amplifiers
Key Design Considerations for Interfacing to an
Analog-to-Digital Converter
Setting the Output Common-Mode Voltage With the
V
OCM
Input
Saving Power With Power-Down Functionality
Linearity: Definitions, Terminology, Circuit
Techniques, and Design Tradeoffs
An Abbreviated Analysis of Noise in Fully
Differential Amplifiers
Printed-Circuit Board Layout Techniques for Optimal
Performance
Power Dissipation and Thermal Considerations
Power Supply Decoupling Techniques and
Recommendations
Evaluation Fixtures, Spice Models, and Applications
Support
Additional Reference Material
FULLY DIFFERENTIAL AMPLIFIER
TERMINAL FUNCTIONS
Fully differential amplifiers are typically packaged in
eight-pin packages as shown in the diagram. The device
pins include two inputs (V
IN+
,
V
IN
), two outputs (V
OUT
,
V
OUT+
), two power supplies (V
S+
, V
S
), an output
common-mode control pin (V
OCM
), and an optional
power-down pin (PD).
V
IN
1
2
3
4
8
7
6
5
V
OCM
V
S+
V
OUT+
V
IN+
V
S
V
OUT
PD
Fully Differential Amplifier Pin Diagram
A standard configuration for the device is shown in the
figure. The functionality of a fully differential amplifier can
be imagined as two inverting amplifiers that share a
common noninverting terminal (though the voltage is not
necessarily fixed). For more information on the basic
theory of operation for fully differential amplifiers, refer to
the Texas Instruments application note titled
Fully
Differential Amplifiers
, literature number SLOA054.
INPUT COMMON-MODE VOLTAGE RANGE
AND THE THS4500 FAMILY
The key difference between the THS4500/1 and the
THS4502/3 is the input common-mode range for the two
devices. The THS4502 and THS4503 have an input
common-mode range that is centered around midrail, and
the THS4500 and THS4501 have an input common-mode
range that is shifted to include the negative power supply
rail. Selection of one or the other is determined by the
nature of the application. Specifically, the THS4500 and
THS4501 are designed for use in single-supply
applications where the input signal is ground-referenced,
as depicted in Figure 93. The THS4502 and THS4503 are
designed for use in single-supply or split-supply
applications where the input signal is centered between
the power supply voltages, as depicted in Figure 94.
Figure 93
V
OCM
+V
S
V
S
R
S
R
g1
R
g2
R
f1
R
f2
+
R
T
+
Application Circuit for the THS4500 and THS4501,
Featuring Single-Supply Operation With a
Ground-Referenced Input Signal
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS4502IDGNG4 功能描述:特殊用途放大器 Hi-Sp Fully-Diff Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
THS4502IDGNR 功能描述:特殊用途放大器 Hi-Sp Fully-Diff Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
THS4502IDGNRG4 功能描述:特殊用途放大器 Hi-Sp Fully-Diff Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
THS4502IDGNT 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDEBAND, LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIERS
THS4502IDR 功能描述:特殊用途放大器 Hi-Sp Fully-Diff Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
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