LMV931MGX

Product Overview

Category: Integrated Circuit (IC)

Use: LMV931MGX is a low voltage, low power operational amplifier designed for general-purpose applications. It is commonly used in audio amplification, sensor signal conditioning, and other low-power analog signal processing circuits.

Characteristics: - Low voltage operation: LMV931MGX operates at a supply voltage as low as 1.8V, making it suitable for battery-powered devices. - Low power consumption: With a typical quiescent current of only 20µA, the LMV931MGX helps conserve energy in portable applications. - Rail-to-rail input and output: The operational amplifier supports input and output signals that can swing close to the supply rails, maximizing dynamic range. - Small package size: The LMV931MGX is available in a miniature SOT-23 package, enabling space-efficient designs.

Package and Quantity: The LMV931MGX is supplied in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Input Offset Voltage: ±2mV (maximum)
• Gain Bandwidth Product: 1MHz (typical)
• Input Bias Current: 1pA (typical)
• Output Current: 30mA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LMV931MGX features a standard 5-pin SOT-23 package with the following pin configuration:

____ V+ |1 5| OUT IN-|2 4| V- IN+|3____|

Functional Features

1. Low Power Consumption: The LMV931MGX's low quiescent current makes it ideal for battery-powered devices, extending battery life.
2. Wide Supply Voltage Range: With a supply voltage range of 1.8V to 5.5V, the operational amplifier can be used in various low-voltage applications.
3. Rail-to-Rail Input and Output: The ability to handle input and output signals close to the supply rails allows for maximum signal swing and dynamic range.
4. High Gain Bandwidth Product: The LMV931MGX offers a gain bandwidth product of 1MHz, enabling accurate amplification of high-frequency signals.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide supply voltage range - Rail-to-rail input and output - Small package size - High gain bandwidth product

Disadvantages: - Limited output current capability (30mA)

Working Principles

The LMV931MGX is based on a differential input stage followed by a single-ended output stage. It utilizes a combination of transistors and resistors to amplify and condition analog signals. The operational amplifier operates in a closed-loop configuration, where feedback is used to control the gain and performance characteristics.

Application Field Plans

The LMV931MGX finds applications in various fields, including: 1. Audio Amplification: The operational amplifier can be used in audio circuits to amplify weak audio signals from microphones or other sources. 2. Sensor Signal Conditioning: It is suitable for conditioning signals from sensors such as temperature sensors, pressure sensors, or light sensors. 3. Portable Devices: Due to its low power consumption and small package size, the LMV931MGX is commonly used in portable devices like smartphones, tablets, and wearable electronics.

Alternative Models

1. LMV321: This is a similar operational amplifier with a lower gain bandwidth product but lower cost.
2. LMV358: A dual operational amplifier with similar characteristics, suitable for applications requiring multiple amplifiers.
3. LMV324: A quad operational amplifier offering four independent amplifiers in a single package.

These alternative models provide flexibility in choosing the right operational amplifier based on specific application requirements.

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