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Texas Instruments OPA2227UA/2K5: Product Overview

Introduction

The OPA2227UA/2K5 is a high-precision operational amplifier developed by Texas Instruments, a leading manufacturer of semiconductor products. This dual op-amp is renowned for its low noise, low distortion, and high accuracy, making it suitable for a wide range of applications in industries such as medical instrumentation, audio processing, and data acquisition systems. In this article, we'll explore the key features, specifications, applications, and other valuable information about the OPA2227UA/2K5, providing a comprehensive understanding of this component.

Product Description

The OPA2227UA/2K5 is part of the OPAx227 series of operational amplifiers, which are designed for high-precision and low-noise applications. This device offers excellent DC precision, low offset voltage, and low noise, making it ideal for applications requiring accurate signal amplification. The "UA" in the part number indicates the SOIC (Small Outline Integrated Circuit) package type, while "2K5" refers to the tape and reel packaging quantity, which typically contains 2,500 units.

The OPA2227UA/2K5 operates on a wide supply voltage range of ±2 V to ±18 V, which makes it versatile for various power supply configurations. The device is characterized by its low offset voltage of 100 µV (max), low noise density of 3 nV/√Hz, and a high common-mode rejection ratio (CMRR) of 120 dB. These features contribute to the amplifier's ability to deliver high-fidelity signal processing in demanding applications.

Key Features

  • Low Noise: The OPA2227UA/2K5 boasts an impressive low noise density of 3 nV/√Hz at 1 kHz, making it suitable for sensitive analog signal processing tasks.
  • Low Offset Voltage: With a maximum offset voltage of 100 µV, this operational amplifier ensures minimal deviation from the ideal output, providing high accuracy.
  • High CMRR: The high common-mode rejection ratio of 120 dB allows the amplifier to reject common-mode signals effectively, ensuring precise differential signal amplification.
  • Wide Supply Voltage Range: The device can operate with a dual supply voltage ranging from ±2 V to ±18 V, offering flexibility in various power supply designs.
  • Unity-Gain Stable: The OPA2227UA/2K5 is unity-gain stable, which means it can operate at a gain of 1 without oscillation, making it suitable for buffer and other low-gain configurations.
  • High Slew Rate: With a slew rate of 0.8 V/µs, the amplifier can handle rapid changes in input signals, making it suitable for dynamic signal processing applications.
  • Low Total Harmonic Distortion (THD): The device exhibits low THD of 0.00005% (typical), ensuring high-fidelity audio and signal amplification.
  • Temperature Range: The operational amplifier is designed to operate across a wide temperature range of -40°C to +85°C, making it suitable for industrial and automotive applications.

Detailed Specifications

Below is a detailed overview of the OPA2227UA/2K5’s key specifications:

  • Package Type: SOIC-8
  • Number of Channels: 2
  • Supply Voltage Range: ±2 V to ±18 V
  • Input Offset Voltage: 100 µV (max)
  • Input Bias Current: 1 nA (typical)
  • Input Offset Current: 1 nA (typical)
  • Common-Mode Rejection Ratio (CMRR): 120 dB (min)
  • Power Supply Rejection Ratio (PSRR): 120 dB (min)
  • Noise Density: 3 nV/√Hz at 1 kHz
  • Slew Rate: 0.8 V/µs (typical)
  • Gain Bandwidth Product (GBP): 8 MHz (typical)
  • Open-Loop Gain: 160 dB (typical)
  • Total Harmonic Distortion + Noise (THD+N): 0.00005% (typical)
  • Operating Temperature Range: -40°C to +85°C

Applications

The OPA2227UA/2K5 is widely used in various applications that require high precision, low noise, and low distortion amplification. Some of the key applications include:

  1. Medical Instrumentation: Ideal for amplifying low-level signals in medical devices such as ECG, EEG, and other bio-signal monitoring systems.
  2. Audio Processing: Used in high-fidelity audio equipment, including preamplifiers, equalizers, and audio mixers, where low noise and low distortion are critical.
  3. Data Acquisition Systems: Provides accurate signal amplification for sensors and transducers in data acquisition and measurement systems.
  4. Industrial Control Systems: Used in process control and automation systems for precise signal conditioning and amplification.
  5. Seismic Sensors: Amplifies weak seismic signals for analysis in geophysical exploration and monitoring.
  6. Precision Weighing Scales: Ensures accurate signal processing in high-precision weighing and force measurement systems.
  7. Photodiode Amplifiers: Used in optical sensors and communication systems for low-noise amplification of photodiode signals.
  8. Test and Measurement Equipment: Integral in signal conditioning and amplification circuits in various test and measurement instruments.

Decoding the Part Number

Understanding the part number of the OPA2227UA/2K5 can help in identifying its characteristics and packaging details:

  • OPA2227: Indicates the specific model and series of the operational amplifier. The "OPA" prefix stands for operational amplifier, and "2227" denotes the specific product model.
  • UA: This suffix indicates the SOIC-8 (Small Outline Integrated Circuit) package type. The "UA" is a Texas Instruments code for this specific package.
  • /2K5: This suffix represents the packaging option and quantity. The "2K5" indicates tape and reel packaging, with a quantity of 2,500 units per reel.

Manufacturer Overview

Texas Instruments (TI) is a global semiconductor design and manufacturing company that develops analog ICs and embedded processors. Founded in 1930 and headquartered in Dallas, Texas, TI is a leading supplier of high-performance analog electronics, digital signal processing (DSP) solutions, and microcontrollers. The company's products are widely used in various industries, including automotive, industrial, communications, and consumer electronics. TI is known for its innovation, quality, and comprehensive product portfolio, which supports engineers and designers in creating cutting-edge electronic systems.

Frequently Asked Questions (FAQs)

  1. What is the noise performance of the OPA2227UA/2K5?

    • The OPA2227UA/2K5 features a low noise density of 3 nV/√Hz at 1 kHz, making it ideal for low-noise signal amplification applications.
  2. What is the supply voltage range for the OPA2227UA/2K5?

    • The OPA2227UA/2K5 operates with a supply voltage range of ±2 V to ±18 V, providing flexibility in different power supply configurations.
  3. What is the input offset voltage of the OPA2227UA/2K5?

    • The maximum input offset voltage of the OPA2227UA/2K5 is 100 µV, which ensures high accuracy in signal amplification.
  4. Is the OPA2227UA/2K5 suitable for audio applications?

    • Yes, the OPA2227UA/2K5 is highly suitable for audio applications due to its low total harmonic distortion (THD) of 0.00005% and low noise performance.
  5. What package type does the OPA2227UA/2K5 come in?

    • The OPA2227UA/2K5 is available in a SOIC-8 package, which is a small outline integrated circuit with 8 pins.
  6. Can the OPA2227UA/2K5 be used in battery-powered applications?

    • Yes, with its wide supply voltage range and low power consumption, the OPA2227UA/2K5 is suitable for battery-powered applications.
  7. What is the common-mode rejection ratio (CMRR) of the OPA2227UA/2K5?

    • The OPA2227UA/2K5 has a high CMRR of 120 dB, which allows it to reject common-mode signals effectively, ensuring accurate differential signal amplification.
  8. What is the slew rate of the OPA2227UA/2K5?

    • The slew rate of the OPA2227UA/2K5 is 0.8 V/µs, which is adequate for handling dynamic changes in input signals.
  9. What temperature range can the OPA2227UA/2K5 operate in?

    • The OPA2227UA/2K5 is designed to operate within a temperature range of -40°C to +85°C, making it suitable for industrial and automotive applications.
  10. What is the primary application of the OPA2227UA/2K5?

    • The primary applications of the OPA2227UA/2K5 include medical instrumentation, audio processing, data acquisition systems, and industrial control systems, where high precision and low noise are critical.

Conclusion

The Texas Instruments OPA2227UA/2K5 is a high-performance operational amplifier designed for applications that demand precision, low noise, and low distortion. Its wide range of features, including low offset voltage, high CMRR, and wide supply voltage range, make it a versatile component for various industries. Whether used in medical devices, audio equipment, or industrial control systems, the OPA2227UA/2K5 delivers reliable and accurate signal amplification. With its robust design and exceptional performance, this operational amplifier continues to be a preferred choice for engineers and designers worldwide.


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