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运算放大器(运放)

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运算放大器(简称运放)在模拟信号调节应用中起着重要作用。运放由Karl Dale Swartzel Jr.在1941年发明,如今广泛应用于各类电子设备中。

它们是工业应用向工业4.0过渡和汽车客户向电气化过渡的关键推动力量

意法半导体运算放大器

意法半导体的运算放大器产品组合提供独特的高性能、低功率和精密运算放大器,采用微型封装。
其电压范围为1.5至44 V,工作温度范围为-40至175°C。

运算放大器有哪些用途?为什么应该选择意法半导体的运算放大器?

运算放大器主要用于

  • 交流和/或直流信号放大
  • 缓冲
  • 驱动信号
  • 增益和电平移位
  • 滤波
  • 执行数学运算

但实际的用途远远不止这些 - 我们的产品将为您带来 以下优势

  • 市面上最广泛的微功率运算放大器,功耗低至600 nA
  • 高可靠性、高产能的标准及高性能运算放大器供应商
  • 节省空间的封装,包括CSP、DFN、QFN、SOT-23和SC-70
免费的在线研讨会

 

运算放大器:面向工业系统的新型电流传感解决方案

立刻免费访问我们录制的在线研讨会

运算放大器的类型

每种应用都需要一个合适的运算放大器:我们所设计的运算放大器种类与日俱增,直面工业、汽车和消费市场的重重挑战。

10年长期供货计划
  • 低功耗运算放大器

    电流消耗极低的运算放大器,可延长电池寿命,适合大量不同的应用。

  • 高精度运算放大器

    意法半导体的精密运算放大器解决方案包含零漂移放大器和温度范围内偏移漂移小的放大器。可与任何传感器完美配合使用,包括气体、温度、压力和位置传感器。

  • 低输入偏置电流运算放大器

    我们的系列产品适合任何跨阻抗应用,或可用作处理高阻抗传感器。

  • 轨到轨运算放大器

    我们的轨到轨运算放大器产品包含几个系列,涵盖不同的电压范围及多种功耗和增益带宽组合。

  • 高电压运算放大器

    我们的高电压系列产品具有从2.7到36 V的扩展电源电压范围,简化了各种汽车和工业应用的设计:滤波器、电源和电机控制、执行器驱动、霍尔效应传感器和电阻式换能器。

  • 高速运算放大器

    意法半导体提供高端、高速运算放大器产品组合。

特色运算放大器

tsv792高速运算放大器

TSV792 高带宽、低偏移的轨到轨运算放大器

tsz181h零偏移运算放大器

TSZ181H 超高精度、零偏移运算放大器

tsb712 6 mhz精密运算放大器

TSB712 6 MHz,精密、轨到轨运算放大器

面向汽车应用的运算放大器

汽车运算放大器

了解我们的汽车级运算放大器产品组合,其可靠性和质量极高,定能满足汽车应用的需求。

查看所有汽车运算放大器

运算放大器 - 快速参考指南(PDF)

下载这个非常实用的PDF资源,包括:

  • 我如何为应用选择正确的运算放大器?
  • 典型运算放大器应用和关键参数
  • 使用意法半导体Op Amps应用程序一步步选择运算放大器
  • 意法半导体的运算放大器命名惯例
  • 词汇表

 

意法半导体的运算放大器系列一览

operational amplifier portfolio
适用于SMPS和模拟IC的电气模拟软件,速度极快且功能强大
运算放大器和比较器的训练套件

New 20MHz, low-offset op amp in high-performance 5V family

The TSV772 is a dual operational amplifier (op amp) combining high accuracy, low power consumption, and the option of a very small 2.0mm x 2.0mm DFN8 package.

Enlarging ST’s high-performance 5V op-amp family, the device features also rail-to-rail inputs / outputs, 20MHz gain-bandwidth (GBW), and is unity-gain stable. With a slew rate of 13V/µs, 7nV/√Hz input noise density, and 4kV ESD capability (HBM), the TSV772 is a strong all-round performer.

Automotive grade version is also available.

High bandwidth and low offset 5 V op amps for Industrial and Automotive

ST enlarges its 5V Op-Amp portfolio with the new TSV7722 and TSV7723  dual high-performance operational amplifiers.
Boasting a gain bandwidth product of 22MHz, an input offset voltage of 50µV, and a wide supply voltage range, the TSV7722 and TSV7723 (feat. shutdown option) are the perfect choice for low-side current sensing in industrial and automotive contexts.

Automotive grade version is also available for TSV7722.

Questions / Answers

What are the main characteristics of ideal and real op amps?

Ideal op amp

Real op amp

Infinite bandwidth: all frequency signals are amplified without attenuation. Each op amp has its specific gain-bandwidth product: input frequency should not exceed this particular frequency range at the desired gain.
Infinite input impedance: in order not to affect upstream circuitry. Very high, but finite input impedance.
Zero output impedance: in order not to affect downstream circuitry. Very low, but not zero output impedance.

What are the main applications for op amps?

It can be easily said that op amps are present in almost all electrical devices and can be used for various applications, depending on the external components/circuitry or topology.

Differential amplifier (difference amplifier)

op amps differential amplifier circuit

Amplifies the difference in voltage between its inputs.

Inverting amplifier

op amps inverting amplifier circuit

An inverting amplifier is a special case of the differential amplifier producing an output which is 180° out of phase with respect to its input.

Non-inverting amplifier

op amps non inverting amplifier circuit

In this case, the output voltage is always in phase with the input voltage, which is why this topology is known as non-inverting.

Voltage follower (unity buffer amplifier)

op amps voltage follower circuit

This circuit does not generally require external components, and provides high input impedance and low output impedance, which makes it a useful buffer.

More from 运算放大器(运放) portfolio

eDesignSuite

eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Signal Conditioning Design Tool

Choose design tool:

Active Filters

Handles multi-stage-designs and common topologies
Returns circuit component values
Provides gain, phase and group delay graphs
Low Pass, High Pass and Band Pass

Comparators

Handles most common configurations
Returns circuit components values
Provides I/O signal waveforms
Inverting, Non Inverting, Window

Current Sensing

Returns circuit component values
Provides current error graphs