INA111AP datasheet by Texas Instruments

INA111AP Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the INA111AP can handle?
  The INA111AP can handle input voltages up to ±40V, but it's recommended to keep the input voltage within ±20V for optimal performance.
• How do I ensure the INA111AP is operating within its common-mode voltage range?
  The INA111AP's common-mode voltage range is ±200mV. To ensure operation within this range, make sure the input voltage is within ±200mV of the power supply voltage (VCC).
• What is the purpose of the REF pin, and how do I use it?
  The REF pin is a reference voltage output that can be used as a voltage reference for the system. It's typically connected to a capacitor to filter out noise. The REF pin output is 1/2 of the supply voltage (VCC).
• How do I calculate the gain of the INA111AP?
  The gain of the INA111AP is determined by the ratio of the resistors Rg and Rf. The gain is calculated as G = (Rf/Rg) + 1. For example, if Rg = 1kΩ and Rf = 2kΩ, the gain would be G = (2kΩ/1kΩ) + 1 = 3.
• What is the purpose of the null pins ( pins 1 and 8) on the INA111AP?
  The null pins (pins 1 and 8) are used to adjust the offset voltage of the INA111AP. Connecting a potentiometer between the null pins and the output pin (pin 6) allows for fine-tuning of the output voltage to zero out any offset voltage.