INA126EA/2K5G4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Instrumentation Amplifier
• Characteristics: High precision, low noise, low power consumption
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Amplification of small differential signals with high accuracy
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: ±2.25V to ±18V
• Input Offset Voltage: 50µV (maximum)
• Input Bias Current: 0.1nA (maximum)
• Gain Bandwidth Product: 200kHz (typical)
• Input Common Mode Range: -Vs + 1.8V to Vs - 1.8V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA126EA/2K5G4 has a total of 8 pins:

1. REF: Reference voltage input
2. RG: Gain resistor connection
3. RG: Gain resistor connection
4. V+: Positive supply voltage
5. OUT: Amplified output signal
6. V-: Negative supply voltage
7. RG: Gain resistor connection
8. RG: Gain resistor connection

Functional Features

• High common-mode rejection ratio (CMRR) of 120dB
• Low input offset voltage for accurate amplification
• Low input bias current for minimal loading on the source
• Wide input common-mode range for versatile applications
• Rail-to-rail output swing for maximum signal integrity

Advantages and Disadvantages

Advantages: - High precision amplification of small differential signals - Low noise performance for accurate measurements - Low power consumption for energy-efficient operation - Versatile input common-mode range for various applications

Disadvantages: - Limited gain bandwidth product compared to some alternatives - Requires external gain resistors for setting the amplification level

Working Principles

The INA126EA/2K5G4 is an instrumentation amplifier designed to amplify small differential signals with high accuracy. It consists of three operational amplifiers and precision resistors that provide a high CMRR, low offset voltage, and low bias current. The input signal is amplified by a user-defined gain set using external resistors connected to the RG pins. The amplified output signal is then available at the OUT pin.

Detailed Application Field Plans

The INA126EA/2K5G4 finds applications in various fields, including:

1. Biomedical instrumentation: Amplifying bioelectric signals for medical monitoring devices.
2. Industrial process control: Precise measurement and amplification of sensor signals in industrial automation systems.
3. Strain gauge amplification: Accurate amplification of strain gauge signals in load cells and force sensors.
4. Data acquisition systems: Signal conditioning and amplification for accurate data acquisition in scientific research and testing.
5. Temperature measurement: Amplification of small temperature differentials in thermocouple-based temperature sensing systems.

Detailed and Complete Alternative Models

1. AD8221: Instrumentation amplifier with higher gain bandwidth product (1MHz) and lower input offset voltage (25µV).
2. INA128: Precision instrumentation amplifier with programmable gain and higher CMRR (130dB).
3. AD620: Low power instrumentation amplifier with adjustable gain and wide supply voltage range.
4. LTC2050: Zero-drift instrumentation amplifier with ultra-low input offset voltage (5µV) and low noise performance.

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