INA126U

Product Overview

Category: Integrated Circuit (IC)

Use: The INA126U 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 - Adjustable gain settings - High common-mode rejection ratio (CMRR) - Low power consumption

Package: The INA126U is available in a small outline package (SOIC) with 8 pins.

Essence: The essence of the INA126U 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 INA126U 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)
• Common-Mode Rejection Ratio (CMRR): 120dB (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA126U has the following pin configuration:

```

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| | --| V+ | --| IN+ | --| IN- | --| REF | --| OUT | --| RG | --| V- | |___________| ```

• V+: Positive supply voltage
• IN+: Non-inverting input
• IN-: Inverting input
• REF: Reference voltage
• OUT: Output
• RG: Gain setting resistor
• V-: Negative supply voltage

Functional Features

• High gain accuracy and stability
• Low input offset voltage and bias current
• Excellent common-mode rejection
• Adjustable gain settings for flexibility
• Wide operating voltage range
• Low power consumption

Advantages

• Accurate amplification of weak signals
• Low noise and distortion
• Suitable for precision measurement applications
• Versatile and adaptable to various circuit designs
• Robust performance in challenging environments

Disadvantages

• Limited bandwidth compared to specialized amplifiers
• Requires external gain setting resistor for optimal performance
• Higher cost compared to basic operational amplifiers

Working Principles

The INA126U is 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. The gain can be adjusted by selecting an appropriate value for the external gain setting resistor (RG). This allows precise amplification of small signals with high accuracy.

Application Field Plans

The INA126U finds application in various fields, including: 1. Biomedical instrumentation: ECG, EEG, and EMG signal amplification. 2. Industrial process control: Amplification of sensor signals for monitoring and control systems. 3. Strain gauge measurements: Precise amplification of strain gauge outputs for load cells and force sensors. 4. Temperature and pressure sensing: Accurate amplification of sensor signals in HVAC systems and industrial automation. 5. Data acquisition systems: Signal conditioning and amplification for accurate data measurement.

Alternative Models

There are several alternative models available that offer similar functionality to the INA126U. Some popular alternatives include: - AD620 - INA128 - AD8221 - MCP6N11

These alternatives may have slightly different specifications and pin configurations but serve the same purpose of precision signal amplification.

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