INA168NA/250G4 datasheet by Texas Instruments

INA168NA/250G4 Frequently Asked Questions (FAQs)

• What is the maximum input voltage that the INA168 can handle?
  The INA168 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 for my application?
  The gain resistor (Rg) should be chosen based on the desired gain and input voltage range. A smaller Rg value increases the gain, but also increases the noise. A larger Rg value decreases the gain, but reduces noise. TI provides a gain resistor calculator tool to help with the selection.
• 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 the analog-to-digital converter (ADC) reference input to improve the accuracy of the measurements. The REF pin output is 1.024V ±1%.
• How do I filter out noise and interference in my INA168-based design?
  To filter out noise and interference, use a low-pass filter (LPF) or a band-pass filter (BPF) at the input stage. Additionally, use a ground plane, keep the layout compact, and use shielding to minimize electromagnetic interference (EMI).
• What is the maximum current that the INA168 can drive?
  The INA168 can drive up to 10mA of current, making it suitable for driving ADCs or other devices that require a low-impedance output.