INA118U/2K5

Product Overview

Category: Integrated Circuit (IC)

Use: The INA118U/2K5 is a precision instrumentation amplifier designed for accurate signal amplification in various applications.

Characteristics: - High accuracy and precision - Low noise and distortion - Wide input voltage range - High common-mode rejection ratio (CMRR) - Low power consumption

Package: The INA118U/2K5 is available in a small outline package (SOIC) with 8 pins.

Essence: The essence of the INA118U/2K5 lies in its ability to amplify weak signals accurately and reliably, making it suitable for use in sensitive measurement and instrumentation systems.

Packaging/Quantity: The INA118U/2K5 is typically sold in reels or tubes containing multiple units. The exact quantity depends on the supplier and packaging options.

Specifications

• Supply Voltage Range: ±2.25V to ±18V
• Input Offset Voltage: 50µV (maximum)
• Input Bias Current: 0.5nA (maximum)
• Gain Bandwidth Product: 1MHz (typical)
• Input Common-Mode Voltage Range: -Vs + 1.9V to +Vs - 1.9V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA118U/2K5 has the following pin configuration:

```

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| | --| V+ OUT |-- --| V- REF |-- --| RG IN-|-- --| G IN+|-- --| NC VS-|-- --| NC VS+|-- --| NC NC|-- |___________| ```

Pin Description: - V+: Positive supply voltage - V-: Negative supply voltage - OUT: Amplified output signal - REF: Reference voltage - RG: Gain resistor connection - IN-: Inverting input - IN+: Non-inverting input - VS-: Negative supply voltage (ground) - VS+: Positive supply voltage

Functional Features

1. High Accuracy: The INA118U/2K5 offers excellent accuracy, ensuring precise amplification of signals.
2. Low Noise and Distortion: It provides a clean amplified signal with minimal noise and distortion, preserving the integrity of the original input.
3. Wide Input Voltage Range: The amplifier can handle a wide range of input voltages, making it versatile for various applications.
4. High CMRR: The high common-mode rejection ratio allows the amplifier to reject common-mode noise and interference effectively.
5. Low Power Consumption: The INA118U/2K5 is designed to operate efficiently with low power consumption, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - High accuracy and precision - Low noise and distortion - Wide input voltage range - High CMRR - Low power consumption

Disadvantages: - Limited gain bandwidth product compared to some other instrumentation amplifiers - Requires external gain resistor for proper operation

Working Principles

The INA118U/2K5 operates based on the principle of differential amplification. It amplifies the difference between the non-inverting (IN+) and inverting (IN-) input voltages while rejecting common-mode signals. This allows for accurate amplification of small differential signals in the presence of noise and interference.

Detailed Application Field Plans

The INA118U/2K5 finds applications in various fields, including: 1. Biomedical Instrumentation: Used in medical devices for amplifying bioelectric signals such as ECG, EEG, and EMG. 2. Industrial Automation: Employed in control systems for amplifying sensor signals and measuring physical quantities. 3. Test and Measurement Equipment: Used in precision measurement instruments to amplify weak signals accurately. 4. Audio Amplification: Suitable for audio equipment where low noise and distortion are critical, such as high-fidelity audio systems.

Detailed and Complete Alternative Models

1. INA114AP: Similar to the INA118U/2K5 but with a different pin configuration (DIP package).
2. AD620: Another precision instrumentation amplifier with similar characteristics and performance.
3. MCP6N11: Offers low power consumption and rail-to-rail input/output operation.

These alternative models provide similar functionality and can be considered based on specific application requirements.

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