Instrumentation amplifiers are often called In-Amp or InAmp. This article will discuss in detail the advantages, disadvantages, features, and construction associated with instrumentation amplifiers.

An instrumentation amplifier is a special type of amplifier that is derived for some specific purpose. Instrumentation amplifiers offer higher gain, higher CMRR (common mode rejection ratio) and higher input impedance. So it can be said that it tries to have most of the characteristics of an ideal op amp.

Instrumentation amplifiers are often called In-Amp or InAmp. This article will discuss in detail the advantages, disadvantages, features, and construction associated with instrumentation amplifiers.

Advantages and Disadvantages of Instrumentation Amplifiers

Instrumentation amplifiers were developed to gain additional advantages over typical differential amplifiers. This is why instrumentation amplifiers are used in most commercial applications. But it also has some drawbacks. Let's discuss some of the pros and cons of instrumentation amplifiers.

advantage

1. Accuracy and precision of measurements: Instrumentation amplifiers are used for test and measurement purposes. Instrumentation amplifiers do not need to match the input impedance. This is why they are so useful in testing. Better parameter values such as higher CMRR, higher input impedance also have advantages.

2. Gain: The instrumentation amplifier provides a larger value for the open loop gain. This is a clear advantage, and a fundamental requirement for an amplifier.

3. Stability of the system: Inside the instrumentation amplifier, all normal operational amplifiers are connected with negative feedback. It is well known that negative feedback makes the system stable. Instrumentation amplifiers are also very stable.

4. Scalability: Instrumentation amplifiers are incredibly scalable. It provides the option to scale the signal on the input level. This is why the total magnification is so much larger than other amplifiers. The zoom range is also high for this reason.

5. Accessibility: The instrumentation amplifier is built into the IC. There are eight pin ICs available. Therefore, it is easier to handle and use. Again, there aren't many factors to consider during scale-up. The user only needs to know the input signal very well. Let's find the disadvantages of instrumentation amplifiers.

shortcoming

1. Instrumentation amplifiers suffer from long-range transmissions. If the input signal is communicating over an extended range, the amplifier tends to mix the original signal with noise. This problem can be solved if the type of cable can be simplified so that the noise is eliminated or no noise enters the transmission line in the primary stage.

Characteristics of Instrumentation Amplifiers

1. The instrumentation amplifier is a differential amplifier composed of three operational amplifiers.

2. It provides higher open loop gain than typical op amps.

3. It has high CMRR, high input impedance, low offset voltage, and low output impedance, making it close to an ideal operational amplifier.

4. Instrumentation amplifiers provide higher precision and precision when used in test and measurement.

5. Instrumentation amplifiers in integrated circuits can be used for commercial purposes.

Instrumentation Amplifier Architecture

An instrumentation amplifier is a combination of 3 typical amplifiers. They are connected in a specific order to build an instrumentation amplifier. We can divide the instrumentation amplifier design into two parts.

The first part is "two inputs, two outputs". Two standard operational amplifiers are connected as shown in the amplifier circuit diagram. They all have negative feedback because it makes the circuit more stable. The outputs of both amplifiers are connected to three resistors.

The second part is the basic "difference amplifier". The output of the previous amplifier is used as the input of the last amplifier. The output is connected to the amplifier's two resistors of the same value. The positive part is grounded, the negative feedback is related to the negative terminal, the o/p of this op amp is the final output of the instrumentation amplifier.

Wachang focuses on the production and trade of chips, semiconductors and integrated circuits for Internet of things and automotive applications. The main products include high speed op am、Analog Switch Ics 、High Speed Operational Amplifiers 、Digital to Analog Converters - DAC 、Instrumentation Amplifiers 、Board-to-Board Connectors 、MOLEX Receptacles 、molex Mezzanine Connectors 、RM Microcontrollers、MCU NXP Semiconductors 、onsemi Audio Amplifiers、onsemi Image Sensors 、onsemi Switching Controllers 、Switching Controllers AC Dimmer Controller and so on. We are committed to match the functional requirements of upstream original components and downstream customers' terminal products to provide customers with optimized supply chain services.
Wachang is headquartered in Shenzhen and has established a successful marketing channel and set up offices in Hong Kong and Malaysia, the company's dominant brands include TI ADI ST ON INFINEON Xlinx Molex TE...

The products of Wachang has exported to the United States, the United Kingdom, Finland, Germany, South Korea, Vietnam, India and other countries, and have won the recognition of foreign consumers with high quality and low price, and have a good reputation in foreign markets.

For more information, please contact:
Room 3306AB, 33rd Floor, Seg Plaza, Huaqiang North Road, Futian District, Shenzhen, Guangdong, China.
Telephone (+86) 0755 88868090. Email: [email protected]
Website: https://www.wachang.net/en-US/