INA125U datasheet by Texas Instruments

INA125U Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the INA125U can handle?
  The INA125U can handle input voltages up to ±650mV, but it's recommended to keep the input voltage within ±500mV to ensure accurate measurements.
• How do I choose the correct gain resistor (Rg) for my application?
  The gain resistor (Rg) determines the gain of the amplifier. A smaller Rg value results in higher gain. Use the formula Rg = 50kΩ / (Gain - 1) to calculate the required Rg value for your desired gain.
• What is the purpose of the REF pin, and how do I use it?
  The REF pin is a reference input that allows you to set the output voltage of the INA125U to a specific level. You can connect a voltage source or a resistive divider to the REF pin to set the output voltage.
• How do I minimize noise and interference in my INA125U circuit?
  To minimize noise and interference, use a well-regulated power supply, keep the input and output traces short and away from noise sources, and use a ground plane to reduce electromagnetic interference.
• Can I use the INA125U as a differential amplifier?
  Yes, the INA125U can be used as a differential amplifier by connecting the inputs differentially. This configuration provides high common-mode rejection and is useful for measuring small signals in noisy environments.