OPA2891DR

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OPA2891DR

+BOM

Dual-channel 180MHz 0.95nV Hz

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Specifications

Attribute Value
Series OPAx891
Part Status Active
Amplifier Type Standard (General Purpose)
Number of Circuits 2
Output Type Push-Pull
Slew Rate 105V/µs
Gain Bandwidth Product 180 MHz
Current - Input Bias 9 µA
Voltage - Input Offset 200 µV
Supply Current 7.5mA (x2 Channels)
Current - Output / Channel 200 mA
Voltage - Supply Span (Min) 9 V
Voltage - Supply Span (Max) 36 V
Operating Temperature -40°C ~ 85°C (TA)
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC
-3 dB Bandwidth 135 MHz

Overview

Description

The OPA2891DR is a precision, low-noise operational amplifier designed for a wide range of applications, including audio processing, instrumentation, and sensor signal conditioning. It features a low offset voltage and low drift, making it suitable for high-accuracy applications. The device operates with a supply voltage range of ±2.5V to ±18V, ensuring compatibility with various power supply configurations.
With a bandwidth of 10 MHz and a slew rate of 20 V/μs, the OPA2891DR can handle fast signal changes while maintaining stability and linearity. It boasts low total harmonic distortion (THD) and good power supply rejection ratio (PSRR), contributing to its effectiveness in high-fidelity audio and precision measurement systems.
Packaged in an 8-pin SOIC, the OPA2891DR is easy to integrate into circuit designs. Its robust performance and versatility make it a popular choice among engineers for applications requiring high precision and low noise.

Equivalent

The OPA2891DR is a precision operational amplifier. Equivalent products include the OPA2134, OPA2132, and AD797 from Analog Devices. Other alternatives could be the LT1364 from Analog Devices and the MCP602 from Microchip. When selecting a substitute, consider specifications such as supply voltage, bandwidth, input offset voltage, and package type to ensure compatibility with your application.

Features

The OPA2891DR is a high-performance, precision operational amplifier that features:
1. Low Offset Voltage: Typically 0.1 mV, ensuring accuracy in signal processing.
2. Wide Supply Voltage Range: Operates from ±2.5 V to ±18 V, accommodating various applications.
3. High Open-Loop Gain: Provides excellent linearity with a minimum of 120 dB.
4. Low Noise: 8 nV/√Hz at 1 kHz, making it suitable for sensitive applications.
5. Low Total Harmonic Distortion (THD): Typically 0.0005% at 1 kHz, ensuring high fidelity.
6. Rail-to-Rail Output: Allows the output to swing close to the supply rails, maximizing dynamic range.
7. High Slew Rate: 27 V/µs, supporting fast signal changes and high-frequency applications.
8. High Bandwidth: Unity-gain bandwidth of 10 MHz, suitable for a variety of signal conditioning tasks.
9. Low Supply Current: Consumes only 1.3 mA per channel, enhancing energy efficiency.
These features make the OPA2891DR ideal for precision instrumentation, audio, and control applications.

Pinout

The OPA2891DR is a dual, high-performance operational amplifier with a total of 8 pins. The key functions of these pins are as follows:
1. Pin 1 (OUTA): Output for the first op-amp.
2. Pin 2 (–INA): Inverting input for the first op-amp.
3. Pin 3 (+INA): Non-inverting input for the first op-amp.
4. Pin 4 (V–): Negative power supply voltage.
5. Pin 5 (V+): Positive power supply voltage.
6. Pin 6 (+INB): Non-inverting input for the second op-amp.
7. Pin 7 (–INB): Inverting input for the second op-amp.
8. Pin 8 (OUTB): Output for the second op-amp.
The OPA2891DR is designed for precision applications, offering low noise, low distortion, and high bandwidth. It operates on a supply voltage range of ±2.5V to ±18V.

Manufacturer

The OPA2891DR is manufactured by Texas Instruments (TI), a prominent semiconductor company based in the United States. Founded in 1930, Texas Instruments is known for its development and production of a wide range of electronic components, including analog and embedded processing products. The company is a leader in the semiconductor industry and specializes in designing and manufacturing integrated circuits (ICs), microcontrollers, and digital signal processors.
Texas Instruments serves various markets, including automotive, industrial, communications, and consumer electronics, providing solutions that enhance performance and efficiency in electronic designs. The OPA2891DR is a precision operational amplifier, recognized for its low noise and low distortion, making it suitable for applications in audio, instrumentation, and signal processing.
Overall, Texas Instruments is characterized by its technological innovation, commitment to quality, and extensive portfolio of electronic components, positioning it as a key player in the global semiconductor market.

Application

The OPA2891DR is a precision, low-noise operational amplifier widely used in various application areas, including:
1. Signal Processing: Ideal for amplifying low-level signals in audio and instrumentation systems.
2. Medical Devices: Utilized in biosensors and medical instrumentation for accurate signal amplification.
3. Data Acquisition Systems: Employed in transducer signal conditioning and sensor interfaces.
4. Industrial Control: Used in process control systems and automation applications.
5. Communication Systems: Suitable for RF and baseband signal processing in telecom equipment.
6. Consumer Electronics: Applied in audio equipment and electronic devices for high-fidelity performance.

Package

The OPA2891DR is packaged in a VSSOP (Very Thin Shrink Small Outline Package) with 8 pins. This compact package type is designed for high-performance applications while saving board space.

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