Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Category Introduction

Products in this family are used for the reproduction of analog signals with an attendant increase in amplitude, reduction of source impedance, and/or isolation of a signal source from a driven load, as well as performing mathematical operations on analog signals such as summation, negation, integration, etc. Instrumentation amplifiers, chopper stabilized/auto-zero/zero-drift amplifiers, and current feedback types are included.

Product List

7987 Items

Mfr Part #	Quantity Available	UnitPrice	Series	Packaging	Product Status	Amplifier Type	Number of Circuits	Output Type	Slew Rate	Gain Bandwidth Product	-3db Bandwidth	Current - Input Bias	Voltage - Input Offset	Current - Supply	Current - Output / Channel	Voltage - Supply Span (Min)	Voltage - Supply Span (Max)	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
LM358DR IC OPAMP GP 2 CIRCUIT 8SOIC Texas Instruments	605	$0.38		Tape & Reel (TR)	Active	General Purpose	2	-	0.3V/µs	700 kHz	-	20 nA	3 mV	500µA (x2 Channels)	40 mA	3 V	30 V	0°C ~ 70°C (TA)	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
LM324DR IC OPAMP GP 4 CIRCUIT 14SOIC Texas Instruments	1,050	$0.41		Tape & Reel (TR)	Active	General Purpose	4	-	0.5V/µs	1.2 MHz	-	20 nA	3 mV	1.4mA (x4 Channels)	30 mA	3 V	30 V	0°C ~ 70°C (TA)	Surface Mount	14-SOIC (0.154", 3.90mm Width)	14-SOIC
LM258DR IC OPAMP GP 2 CIRCUIT 8SOIC Texas Instruments	597	$0.42		Tape & Reel (TR)	Active	General Purpose	2	-	0.3V/µs	700 kHz	-	20 nA	3 mV	500µA (x2 Channels)	40 mA	3 V	32 V	-25°C ~ 85°C (TA)	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
LM358DT IC OPAMP GP 2 CIRCUIT 8SOIC STMicroelectronics	858	$0.54	Automotive, AEC-Q100	Tape & Reel (TR)	Active	General Purpose	2	-	0.6V/µs	800 kHz	-	20 nA	2 mV	700µA (x2 Channels)	30 mA	3 V	30 V	0°C ~ 70°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
LM324DT IC OPAMP GP 4 CIRCUIT 14SO STMicroelectronics	384	$0.42		Tape & Reel (TR)	Active	General Purpose	4	-	0.4V/µs	1.3 MHz	-	20 nA	2 mV	1.5mA	40 mA	3 V	30 V	0°C ~ 70°C	Surface Mount	14-SOIC (0.154", 3.90mm Width)	14-SO
TS321CX5 RFG IC OPAMP GP 1 CIRCUIT SOT25 Taiwan Semiconductor Corporation	1,453	$0.63		Tape & Reel (TR)	Active	General Purpose	1	-	0.4V/µs	1 MHz	-	45 nA	2 mV	430µA	40 mA	3 V	32 V	-40°C ~ 85°C	Surface Mount	SC-74A, SOT-753	SOT-25
LMV358IDR IC OPAMP GP 2 CIRCUIT 8SOIC Texas Instruments	1,454	$0.59		Tape & Reel (TR)	Active	General Purpose	2	Rail-to-Rail	1V/µs	1 MHz	-	15 nA	1.7 mV	210µA (x2 Channels)	40 mA	2.7 V	5.5 V	-40°C ~ 125°C (TA)	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
TL072CDT IC OPAMP JFET 2 CIRCUIT 8SOIC STMicroelectronics	505	$0.63	Automotive, AEC-Q100	Tape & Reel (TR)	Active	J-FET	2	-	16V/µs	4 MHz	-	20 pA	3 mV	1.4mA	40 mA	6 V	36 V	0°C ~ 70°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
TL074CDT IC OPAMP JFET 4 CIRCUIT 14SO STMicroelectronics	569	$0.65		Tape & Reel (TR)	Active	J-FET	4	-	13V/µs	3 MHz	-	30 pA	3 mV	1.4mA (x4 Channels)	40 mA	6 V	36 V	0°C ~ 70°C	Surface Mount	14-SOIC (0.154", 3.90mm Width)	14-SO
NCS20071SN2T1G IC OPAMP GP 1 CIRCUIT 5TSOP onsemi	1,320	$0.73		Tape & Reel (TR)	Active	General Purpose	1	Rail-to-Rail	2.4V/µs	3.2 MHz	-	2 nA	1.3 mV	465µA	65 mA	2.7 V	36 V	-40°C ~ 125°C	Surface Mount	SOT-23-5 Thin, TSOT-23-5	5-TSOP
LF347DR IC OPAMP JFET 4 CIRCUIT 14SOIC Texas Instruments	289	$0.64		Tape & Reel (TR)	Active	J-FET	4	-	13V/µs	3 MHz	-	50 pA	5 mV	8mA (x4 Channels)	40 mA	7 V	36 V	0°C ~ 70°C (TA)	Surface Mount	14-SOIC (0.154", 3.90mm Width)	14-SOIC
LM2904AVQDR IC OPAMP GP 2 CIRCUIT 8SOIC Texas Instruments	1,057	$0.66		Tape & Reel (TR)	Active	General Purpose	2	-	0.3V/µs	700 kHz	-	20 nA	1 mV	500µA (x2 Channels)	40 mA	3 V	30 V	-40°C ~ 125°C (TA)	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
LMV321IDBVR IC OPAMP GP 1 CIRCUIT SOT23-5 Texas Instruments	570	$0.80		Tape & Reel (TR)	Active	General Purpose	1	Rail-to-Rail	1V/µs	1 MHz	-	15 nA	1.7 mV	130µA	160 mA	2.7 V	5.5 V	-40°C ~ 125°C	Surface Mount	SC-74A, SOT-753	SOT-23-5
MC33178DR2G IC OPAMP GP 2 CIRCUIT 8SOIC onsemi	109	$0.90		Tape & Reel (TR)	Active	General Purpose	2	-	2V/µs	5 MHz	-	100 nA	150 µV	1.7mA (x2 Channels)	100 mA	4 V	36 V	-40°C ~ 85°C (TA)	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
NCS333ASN2T1G IC OPAMP ZERO-DRIFT 1 CIRC 5TSOP onsemi	856	$0.90		Tape & Reel (TR)	Active	Zero-Drift	1	Rail-to-Rail	0.15V/µs	350 kHz	60 kHz	60 pA	3.5 µV	21µA	25 mA	1.8 V	5.5 V	-40°C ~ 105°C	Surface Mount	SOT-23-5 Thin, TSOT-23-5	5-TSOP
NCS20082DMR2G IC OPAMP GP 2 CIRCUIT 8MSOP onsemi	51	$0.94		Tape & Reel (TR)	Active	General Purpose	2	Rail-to-Rail	0.4V/µs	1.2 MHz	-	1 pA	500 µV	48µA (x2 Channels)	15 mA	1.8 V	5.5 V	-40°C ~ 125°C (TA)	Surface Mount	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-MSOP
TL082BIYDT IC OPAMP JFET 2 CIRCUIT 8SOIC STMicroelectronics	950	$0.84	Automotive, AEC-Q100	Tape & Reel (TR)	Active	J-FET	2	-	16V/µs	4 MHz	-	20 pA	1 mV	1.4mA	40 mA	6 V	36 V	-40°C ~ 105°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
TL084CDT IC OPAMP JFET 4 CIRCUIT 14SO STMicroelectronics	92	$0.88	Automotive, AEC-Q100	Tape & Reel (TR)	Active	J-FET	4	-	16V/µs	4 MHz	-	30 pA	3 mV	1.4mA (x4 Channels)	40 mA	6 V	36 V	0°C ~ 70°C	Surface Mount	14-SOIC (0.154", 3.90mm Width)	14-SO
TLV8542DR IC OPAMP GP 2 CIRCUIT 8SOIC Texas Instruments	1,067	$0.93		Tape & Reel (TR)	Active	General Purpose	2	Rail-to-Rail	0.0045V/µs	8 kHz	-	0.1 pA	3.4 mV	550nA (x2 Channels)	15 mA	1.7 V	3.6 V	-40°C ~ 125°C (TA)	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC
TL972IDR IC OPAMP GP 2 CIRCUIT 8SOIC Texas Instruments	434	$0.94		Tape & Reel (TR)	Active	General Purpose	2	Rail-to-Rail	5V/µs	12 MHz	-	200 nA	1 mV	2mA (x2 Channels)	80 mA	2.7 V	12 V	-40°C ~ 125°C	Surface Mount	8-SOIC (0.154", 3.90mm Width)	8-SOIC

About Instrumentation Amplifiers & Operational Amplifiers (OP Amps) & Buffer Amplifiers (Buffer Amps)

What are Instrumentation Amplifiers & Operational Amplifiers (OP Amps) & Buffer Amplifiers (Buffer Amps)?

Instrumentation Amplifiers

Instrumentation amplifiers are specialized linear amplifiers designed to amplify small differential signals while rejecting large common-mode voltages. They are essential in applications requiring precise and accurate signal amplification, especially in environments with significant electrical noise. The basic operating principle involves using a three-op-amp configuration to achieve high input impedance, low output impedance, and excellent common-mode rejection ratio (CMRR). This setup ensures that the amplifier can accurately amplify the difference between two input signals while minimizing the influence of any noise or interference that is common to both inputs.

Operational Amplifiers (OP Amps)

Operational Amplifiers, commonly known as OP Amps, are integral components in the field of electronics, particularly within the linear amplifiers category. These versatile devices are designed to amplify voltage signals and are characterized by their high gain and differential input. An OP Amp typically consists of two input terminals, an inverting (-) and a non-inverting (+), and a single output terminal. The basic operating principle involves amplifying the voltage difference between the two input terminals, which is then outputted as a significantly larger voltage. This makes OP Amps ideal for a variety of applications, including signal conditioning, filtering, and mathematical operations like addition, subtraction, integration, and differentiation.

Buffer Amplifiers (Buffer Amps)

Buffer amplifiers, commonly known as buffer amps, are essential components in the realm of linear amplifiers. Their primary function is to isolate different stages of a circuit, preventing the load from affecting the source. By providing a high input impedance and a low output impedance, buffer amps ensure that the signal is transferred efficiently without distortion or loss. They operate on the principle of impedance matching, which allows them to maintain signal integrity across various circuit stages. Typically, buffer amplifiers do not amplify the signal's voltage but rather serve as a conduit to maintain the signal's original strength and quality.

Types of Instrumentation Amplifiers

1. Three-Op-Amp Instrumentation Amplifiers

This is the most common type, utilizing three operational amplifiers to achieve high precision and stability. The first two op-amps serve as buffer amplifiers, providing high input impedance, while the third op-amp amplifies the differential signal. They are widely used due to their excellent CMRR and flexibility in gain adjustment.

2. Two-Op-Amp Instrumentation Amplifiers

These amplifiers use only two operational amplifiers, making them more cost-effective and suitable for applications where space and power consumption are critical. However, they may offer slightly lower performance in terms of CMRR compared to the three-op-amp configuration.

3. Integrated Instrumentation Amplifiers

These are single-package solutions that integrate all necessary components, including resistors and op-amps, to form a complete instrumentation amplifier. They offer ease of use, compact size, and consistent performance, making them ideal for mass production and applications requiring minimal design complexity.

Types of Operational Amplifiers (OP Amps)

1. General-Purpose OP Amps

General-purpose OP Amps are designed for a wide range of applications and are characterized by their moderate speed and bandwidth. They are cost-effective solutions for basic amplification needs and are commonly used in audio and signal processing tasks.

2. High-Speed OP Amps

High-speed OP Amps are engineered to handle fast signal processing with high bandwidth and slew rates. These are essential in applications requiring rapid response times, such as video signal processing and high-frequency communications.

3. Low-Noise OP Amps

Low-noise OP Amps are specialized for applications where minimizing signal interference is crucial. They are ideal for precision instrumentation and audio applications where maintaining signal integrity is paramount.

4. Precision OP Amps

Precision OP Amps offer high accuracy and stability, making them suitable for applications requiring exact measurements, such as in medical instrumentation and industrial control systems.

5. Low-Power OP Amps

Low-power OP Amps are designed to operate efficiently with minimal power consumption, making them suitable for battery-operated devices and portable electronics.

Types of Buffer Amplifiers (Buffer Amps)

Voltage Buffer Amplifiers

Voltage buffer amplifiers are designed to provide unity gain, meaning the output voltage is the same as the input voltage. They are widely used in applications where signal integrity is crucial, such as in audio and video equipment. These amplifiers are characterized by their high input impedance and low output impedance, making them ideal for driving heavy loads without signal degradation.

Current Buffer Amplifiers

Current buffer amplifiers, also known as current followers, are used to transfer current from a high-impedance source to a low-impedance load. They are particularly useful in applications requiring high current drive capability, such as in power amplifiers and motor control circuits. Current buffers ensure that the load does not affect the source, maintaining consistent performance across varying load conditions.

Operational Amplifier Buffers

Operational amplifier buffers utilize op-amps configured as voltage followers. These buffers are versatile and can be used in a wide range of applications, from simple signal buffering to complex analog signal processing. They offer the advantage of being easily integrated into existing circuits, providing flexibility and reliability.

How to choose Instrumentation Amplifiers?

When selecting an instrumentation amplifier, consider the following key parameters:

Gain: Determine the required gain range and ensure the amplifier can be easily adjusted to meet specific application needs.
CMRR: A high common-mode rejection ratio is crucial for minimizing noise and interference.
Input Impedance: High input impedance is necessary to prevent loading effects on the signal source.
Bandwidth: Ensure the amplifier's bandwidth is sufficient for the frequency range of the application.
Power Supply: Consider the power supply requirements, including voltage range and current consumption.

Evaluate product quality and reliability by reviewing supplier datasheets, customer reviews, and industry certifications. Consider environmental factors such as temperature range and humidity, and ensure the amplifier is suitable for the intended installation environment.

How to choose Operational Amplifiers (OP Amps)?

When selecting an OP Amp, several key parameters should be considered:

Gain Bandwidth Product (GBP): Determines the frequency range over which the OP Amp can operate effectively.
Slew Rate: Indicates how quickly the output can change in response to input changes, crucial for high-speed applications.
Input Offset Voltage: Affects the precision of the OP Amp, especially in low-level signal applications.
Noise Performance: Important for applications where signal clarity is critical.
Power Supply Requirements: Ensures compatibility with the available power sources in your application.

Evaluating product quality and reliability involves checking supplier certifications, customer reviews, and warranty terms. Environmental factors such as temperature range and humidity should also be considered, as they can affect performance. Installation requirements, including PCB layout and thermal management, are crucial for optimal operation.

How to choose Buffer Amplifiers (Buffer Amps)?

When selecting a buffer amplifier, several key parameters should be considered to ensure optimal performance:

Input and Output Impedance: Choose a buffer amp with high input impedance and low output impedance to ensure minimal signal loss.
Bandwidth: Ensure the amplifier's bandwidth is sufficient for the application's frequency range to prevent signal distortion.
Power Supply Voltage: Verify that the buffer amp is compatible with the circuit's power supply requirements.
Load Drive Capability: Consider the amplifier's ability to drive the intended load without performance degradation.
Temperature Range: Ensure the buffer amp can operate within the environmental conditions of the application.

Evaluating product quality and reliability involves reviewing supplier specifications, customer reviews, and industry certifications. Additionally, consider environmental factors such as temperature, humidity, and potential electromagnetic interference when installing buffer amplifiers to ensure long-term reliability and performance.

Applications of Instrumentation Amplifiers & Operational Amplifiers (OP Amps) & Buffer Amplifiers (Buffer Amps)

Instrumentation amplifiers, operational amplifiers (OP amps), and buffer amplifiers (buffer amps) are pivotal components in the realm of integrated circuits. These amplifiers are designed to enhance signal integrity, amplify weak signals, and provide isolation between different stages of a circuit. Their versatility and precision make them indispensable across various industries. Below, we explore their applications in five specific sectors.

1. Medical Devices

In the medical industry, precision and reliability are paramount. Instrumentation amplifiers are extensively used in devices such as electrocardiograms (ECGs) and electroencephalograms (EEGs) to amplify the minute electrical signals generated by the human body. OP amps are employed in medical imaging equipment, like MRI machines, to process and enhance signals for clearer images. Buffer amps ensure signal stability and integrity in patient monitoring systems, providing accurate real-time data.

2. Industrial Automation

Instrumentation amplifiers play a crucial role in industrial automation by facilitating accurate data acquisition from sensors and transducers. OP amps are used in control systems to process signals from various sensors, ensuring precise control of machinery. Buffer amps are essential in isolating different stages of control circuits, preventing signal degradation and ensuring robust communication between components.

3. Consumer Electronics

In the realm of consumer electronics, OP amps are integral to audio equipment, enhancing sound quality by amplifying audio signals. Instrumentation amplifiers are used in devices like digital cameras to process image sensor data, improving image clarity and detail. Buffer amps are employed in smartphones and tablets to maintain signal integrity across different circuit stages, ensuring seamless performance.

4. Telecommunications

Telecommunications systems rely heavily on OP amps for signal processing tasks, such as filtering and amplification, to maintain clear and reliable communication. Instrumentation amplifiers are used in base stations to amplify weak signals received from mobile devices. Buffer amps provide isolation in signal transmission paths, ensuring minimal signal loss and interference.

5. Aerospace and Defense

In aerospace and defense applications, instrumentation amplifiers are used in navigation systems to process signals from gyroscopes and accelerometers, ensuring accurate positioning and stability. OP amps are employed in radar systems for signal processing, enhancing detection capabilities. Buffer amps are crucial in communication systems, providing signal integrity and isolation in harsh environments.

In conclusion, instrumentation amplifiers, operational amplifiers, and buffer amplifiers are integral to a wide array of applications across diverse industries. Their ability to enhance, process, and stabilize signals makes them indispensable in modern electronic systems.