Instrumentation Amplifier Gain Calculator

This Instrumentation Amplifier Gain Calculator allows you to determine the gain of an instrumentation amplifier (in-amp) based on the resistor values you provide. This is essential for applications requiring precise signal conditioning, such as sensor data acquisition.

Instrumentation Amplifier Gain Calculator

EXAMPLE:

• INPUTS:

  • Internal Resistor (R1) : 25 kOhms
  • Gain Resistor (RG) : 1 kOhms

• OUTPUT:

  • Gain (Av) : 51

Instrumentation Amplifier Gain Formula

Where,

• G = Gain of the Instrumentation Amplifier
• R1 = Internal Resistor (Ohms)
• RG = Gain Resistor (Ohms)

Typically, R2 = R3 for unity gain configuration. Simlifying the formula gives:

$G = 1 + (2 \* R1 / RG)$

Key benefits of Using the Instrumentation Amplifier Gain Calculator

• Precision: Achieve accurate gain settings for sensitive measurements.
• Efficiency: Save time with quick calculations instead of manual computations.
• User Friendly: Easy to use interface for entering resistor values and obtaining gain.
• Versatility: Applicable for various sensor and measurement applications requiring instrumentation amplifiers.

References

• Franco, S. (2014). Design with Operational Amplifiers and Analog Integrated Circuits. McGraw-Hill.
• Texas Instruments. (2020). INA128/INA129 Precision Instrumentation Amplifiers Datasheet. Retrieved from https://www.ti.com/lit/ds/symlink/ina128.pdf