OPA228PA

Product Overview

Category: Operational Amplifier (Op-Amp)

Use: The OPA228PA is a high-precision, low-noise operational amplifier designed for various applications in the field of analog signal processing. It is commonly used in audio systems, instrumentation, and communication equipment.

Characteristics: - High precision: The OPA228PA offers exceptional accuracy and stability, making it suitable for applications that require precise amplification. - Low noise: With a low input voltage noise density, this op-amp ensures minimal interference and distortion in signal processing. - Wide bandwidth: The device provides a wide frequency response range, enabling it to handle signals with different frequencies effectively. - Low power consumption: The OPA228PA operates at low power levels, making it energy-efficient and suitable for battery-powered devices.

Package: The OPA228PA comes in an 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package, which provides ease of use and compatibility with standard PCB designs.

Essence: The essence of the OPA228PA lies in its ability to accurately amplify analog signals while maintaining low noise and high precision.

Packaging/Quantity: The OPA228PA is typically available in tubes or reels, with quantities varying depending on the supplier and customer requirements.

Specifications

• Supply Voltage Range: ±2.25V to ±18V
• Input Offset Voltage: 50µV (maximum)
• Input Bias Current: 0.1nA (typical)
• Gain Bandwidth Product: 10MHz (typical)
• Slew Rate: 5V/µs (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The OPA228PA has the following pin configuration:

___________ V- | 1 8 | V+ Out | 2 7 | NC In- | 3 6 | In+ |___________|

Pin Description: 1. V-: Negative power supply pin 2. Out: Output pin 3. In-: Negative input pin 4. NC: No connection (unused pin) 5. NC: No connection (unused pin) 6. In+: Positive input pin 7. NC: No connection (unused pin) 8. V+: Positive power supply pin

Functional Features

• High gain and accuracy: The OPA228PA provides a high open-loop gain and excellent linearity, ensuring accurate amplification of input signals.
• Low noise and distortion: With its low input voltage noise and low harmonic distortion, the op-amp maintains signal integrity and fidelity.
• Rail-to-rail output swing: The device offers an output voltage range that extends close to the supply rails, allowing for maximum utilization of the available dynamic range.
• Unity-gain stable: The OPA228PA remains stable even at unity gain, making it suitable for applications requiring a buffer or voltage follower configuration.

Advantages and Disadvantages

Advantages: - High precision and accuracy - Low noise and distortion - Wide bandwidth - Low power consumption - Rail-to-rail output swing - Unity-gain stable

Disadvantages: - Limited availability in certain regions - Relatively higher cost compared to some other op-amps

Working Principles

The OPA228PA operates based on the principles of differential amplification. It amplifies the voltage difference between its positive and negative input terminals, producing an amplified output signal. The device utilizes internal circuitry to maintain stability, minimize noise, and provide high gain.

Detailed Application Field Plans

The OPA228PA finds applications in various fields, including:

1. Audio Systems: The op-amp is used in audio amplifiers, preamplifiers, equalizers, and other audio processing equipment to ensure accurate signal amplification and low noise performance.
2. Instrumentation: It is employed in precision measurement instruments, data acquisition systems, and sensor interfaces, where high accuracy and low noise are crucial for reliable measurements.
3. Communication Equipment: The OPA228PA is utilized in communication devices such as transceivers, modems, and wireless systems to amplify and process analog signals with minimal distortion.

Detailed and Complete Alternative Models

1. OPA227PA: Similar to the OPA228PA, this op-amp offers high precision and low noise characteristics, making it suitable for similar applications.
2. LT1115CN8: This operational amplifier provides ultra-low noise performance and high gain, making it an alternative choice for applications that require exceptional signal fidelity.
3. AD8671ARZ: With low input bias current and low offset voltage, this op-amp is ideal for precision applications where accuracy is paramount.

These alternative models can be considered based