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

Inputs Clear Input

Internal Resistor, R1 in kOhms (input1) :

Gain Resistor, RG in kOhms (input2) :

Outputs Calculate

Gain (G) (output1) :

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

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