OPA2140AID

Product Overview

Category: Operational Amplifier (Op-Amp)

Use: The OPA2140AID is a high-performance, low-noise operational amplifier designed for precision applications. It is commonly used in audio amplification, instrumentation, and sensor signal conditioning.

Characteristics: - Low noise: The OPA2140AID offers very low input voltage noise, making it suitable for applications requiring high signal fidelity. - High gain bandwidth product: With a gain bandwidth product of 20 MHz, the op-amp can handle high-frequency signals accurately. - Low offset voltage: The device has a low input offset voltage, ensuring precise DC performance. - Rail-to-rail output swing: The op-amp provides an output swing that reaches close to the supply rails, maximizing dynamic range.

Package: The OPA2140AID comes in an 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence: The OPA2140AID is a versatile operational amplifier that combines low noise, high gain bandwidth, and low offset voltage to deliver accurate and high-fidelity signal amplification.

Packaging/Quantity: The OPA2140AID is typically available in reels containing 2500 units.

Specifications

• Supply Voltage Range: ±2.5V to ±18V
• Input Offset Voltage: 150 µV (max)
• Input Bias Current: 1 nA (typ)
• Gain Bandwidth Product: 20 MHz
• Slew Rate: 10 V/µs
• Input Noise Voltage: 7 nV/√Hz
• Output Current: 40 mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The OPA2140AID has the following pin configuration:

___________ OUT | 1 8 | V+ IN- | 2 7 | NC IN+ | 3 6 | NC V- | 4 5 | NC ‾‾‾‾‾‾‾‾‾‾‾‾

Functional Features

• Low noise and distortion: The OPA2140AID provides excellent signal fidelity due to its low input voltage noise and low total harmonic distortion.
• Wide bandwidth: With a gain bandwidth product of 20 MHz, the op-amp can handle a wide range of frequencies accurately.
• Rail-to-rail output swing: The device offers an output swing that reaches close to the supply rails, maximizing dynamic range.
• High slew rate: The op-amp has a fast slew rate of 10 V/µs, enabling it to respond quickly to rapid changes in input signals.

Advantages and Disadvantages

Advantages: - High precision and accuracy - Low noise performance - Wide bandwidth for handling high-frequency signals - Rail-to-rail output swing for maximum dynamic range - Fast slew rate for rapid signal response

Disadvantages: - Limited output current capability (40 mA) - Higher cost compared to general-purpose op-amps

Working Principles

The OPA2140AID is based on a differential amplifier configuration, where the difference between the two input voltages is amplified. It utilizes a combination of active devices and feedback mechanisms to achieve high gain, low noise, and accurate amplification of input signals. The op-amp operates by maintaining a virtual ground at the inverting input terminal, which allows it to amplify the voltage difference between the non-inverting and inverting inputs.

Detailed Application Field Plans

The OPA2140AID finds applications in various fields, including:

1. Audio Amplification: The op-amp can be used in audio preamplifiers, headphone amplifiers, and audio mixers to provide low-noise and high-fidelity signal amplification.
2. Instrumentation: It is suitable for precision measurement instruments such as data acquisition systems, oscilloscopes, and spectrum analyzers, where accurate signal conditioning is crucial.
3. Sensor Signal Conditioning: The OPA2140AID can be employed in sensor interface circuits to amplify and condition weak sensor signals before further processing.

Detailed and Complete Alternative Models

1. OPA2134: This op-amp offers similar performance characteristics to the OPA2140AID but comes in a different package (DIP-8).
2. LT1677: A low-noise, rail-to-rail output op-amp with comparable specifications to the OPA2140AID.
3. AD8628: Another precision op-amp with low noise and rail-to-rail output swing capabilities.

These alternative models can be considered based on specific application requirements and availability.

Word count: 550 words