INA122PAG4

Product Overview

Category: Integrated Circuit (IC)

Use: The INA122PAG4 is a precision instrumentation amplifier designed for accurate signal amplification in various applications. It provides high gain, low noise, and excellent common-mode rejection ratio (CMRR).

Characteristics: - High gain - Low noise - Excellent CMRR - Wide input voltage range - Low power consumption

Package: The INA122PAG4 comes in an 8-pin plastic dual in-line package (PDIP) with a small footprint, making it suitable for space-constrained designs.

Essence: The essence of the INA122PAG4 lies in its ability to amplify weak signals accurately while rejecting common-mode noise.

Packaging/Quantity: The INA122PAG4 is typically available in reels or tubes, with a quantity of 2500 units per reel or 50 units per tube.

Specifications

• Supply Voltage Range: ±2.25V to ±18V
• Input Voltage Range: ±Vs - 1.5V
• Gain Bandwidth Product: 700kHz
• Input Offset Voltage: 50µV (maximum)
• Input Bias Current: 10nA (maximum)
• Common-Mode Rejection Ratio: 120dB (minimum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA122PAG4 has eight pins arranged as follows:

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

1. V+: Positive supply voltage pin.
2. OUT: Amplified output signal.
3. V-: Negative supply voltage pin.
4. REF: Reference voltage input.
5. IN-: Inverting input terminal.
6. IN+: Non-inverting input terminal.
7. GND: Ground reference.
8. NC: No connection (unused pin).

Functional Features

1. High Gain: The INA122PAG4 offers a high gain of up to 1000, allowing for precise amplification of weak signals.
2. Low Noise: With a low noise figure, the INA122PAG4 ensures accurate signal amplification without introducing significant additional noise.
3. Excellent CMRR: The amplifier exhibits excellent common-mode rejection, minimizing the impact of common-mode noise on the amplified signal.
4. Wide Input Voltage Range: The INA122PAG4 can handle a wide range of input voltages, making it versatile for various applications.
5. Low Power Consumption: The IC consumes minimal power, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - High gain for accurate signal amplification - Low noise figure for clean signal reproduction - Excellent common-mode rejection ratio for noise reduction - Wide input voltage range for versatility - Low power consumption for energy efficiency

Disadvantages: - Limited availability in certain package options - May require external components for specific applications

Working Principles

The INA122PAG4 operates based on the principle of an instrumentation amplifier. It amplifies the differential voltage between the IN+ and IN- inputs while rejecting common-mode noise. The gain is set by the external resistor RG connected between the IN+ and IN- pins. The amplified output signal is available at the OUT pin.

Detailed Application Field Plans

The INA122PAG4 finds application in various fields, including but not limited to: 1. Biomedical instrumentation: ECG, EEG, and other medical signal amplification. 2. Industrial process control: Amplification of sensor signals in industrial automation. 3. Strain gauge amplification: Precise measurement of strain in structural engineering. 4. Temperature measurement: Accurate amplification of temperature sensor outputs. 5. Data acquisition systems: Signal conditioning for accurate data acquisition.

Detailed and Complete Alternative Models

1. INA121PAG4: Similar to the INA122PAG4 but with a lower gain range.
2. INA123PAG4: A lower-cost alternative with slightly reduced performance specifications.
3. INA126PAG4: Offers additional features such as built-in reference voltage and adjustable gain.

These alternative models provide options based on specific application requirements, cost considerations, and desired performance levels.

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