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| 型号： | THS4500CDG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 运算放大器 |
| 英文描述： | OP-AMP, 0 uV OFFSET-MAX, 300 MHz BAND WIDTH, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 15/47页 |
| 文件大小： | 1203K |
| 代理商： | THS4500CDG4 |
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APPLICATION INFORMATION
FULLY DIFFERENTIAL AMPLIFIER
FULLY DIFFERENTIAL AMPLIFIERS
V
IN- 1
2
3
4
8
7
6
5
V
OCM
V
S+
V
OUT+
V
IN+
V
S-
V
OUT-
PD
APPLICATIONS SECTION
INPUT COMMON-MODE VOLTAGE RANGE
SLOS350E – APRIL 2002 – REVISED MAY 2008 .............................................................................................................................................................. www.ti.com
TERMINAL FUNCTIONS
Fully differential amplifiers are typically packaged in
Differential signaling offers a number of performance
eight-pin packages, as shown in Figure 97. The
advantages in high-speed analog signal processing
device pins include two inputs (VIN+, VIN–), two
systems,
including
immunity
to
external
outputs (VOUT–, VOUT+), two power supplies (VS+, VS–),
common-mode noise, suppression of even-order
an output common-mode control pin (VOCM), and an
nonlinearities, and increased dynamic range. Fully
optional power-down pin (PD).
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
Figure 97. Fully Differential Amplifier Pin Diagram
designs using these amplifiers.
A standard configuration for the device is shown in
Figure 97. The functionality of a fully differential
Fully Differential Amplifier Terminal Functions
amplifier can be imagined as two inverting amplifiers
Input Common-Mode Voltage Range and the
that share a common noninverting terminal (though
THS4500 Family
the voltage is not necessarily fixed). For more
information on the basic theory of operation for fully
Choosing the Proper Value for the Feedback and
differential amplifiers, refer to the Texas Instruments
Gain Resistors
application note Fully Differential Amplifiers, literature
Application Circuits Using Fully Differential
number
available
for
download
at
Amplifiers
Key Design Considerations for Interfacing to an
Analog-to-Digital Converter
Setting the Output Common-Mode Voltage With
AND THE THS4500 FAMILY
the VOCM Input
The key difference between the THS4500/1 and the
Saving Power with Power-Down Functionality
Linearity:
Definitions,
Terminology,
Circuit
four devices. The THS4502 and THS4503 have an
Techniques, and Design Tradeoffs
input common-mode range that is centered around
An Abbreviated Analysis of Noise in Fully
midrail, and the THS4500 and THS4501 have an
Differential Amplifiers
input common-mode range that is shifted to include
the negative power-supply rail. Selection of one or
Printed-Circuit Board Layout Techniques for
the other amplifier is determined by the nature of the
Optimal Performance
application. Specifically, the THS4500 and THS4501
Power Dissipation and Thermal Considerations
are designed for use in single-supply applications
Power Supply Decoupling Techniques and
where the input signal is ground-referenced, as
Recommendations
depicted in Figure 98. The THS4502 and THS4503
Evaluation
Fixtures,
Spice
Models,
and
are designed for use in single-supply or split-supply
Applications Support
applications where the input signal is centered
Additional Reference Material
between the power-supply voltages, as depicted in
22
Copyright 2002–2008, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| THS4500CDGK | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| THS4500CDGKG4 | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| THS4500CDGKR | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| THS4500CDGKRG4 | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| THS4500CDGN | 功能描述:特殊用途放大器 High-Speed Fully Differential +/-5 V RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
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