INA138NA/250G4 datasheet by Texas Instruments

INA138NA/250G4 Frequently Asked Questions (FAQs)

• What is the maximum power dissipation of the INA138NA/250G4?
  The maximum power dissipation of the INA138NA/250G4 is 670mW at 25°C. However, it's recommended to derate the power dissipation to 500mW or less to ensure reliable operation.
• How do I layout the PCB to minimize noise and ensure optimal performance?
  To minimize noise and ensure optimal performance, it's recommended to follow good PCB layout practices such as separating analog and digital grounds, using a solid ground plane, and keeping the input and output traces short and direct. Additionally, place the INA138NA/250G4 close to the signal source and use a low-impedance path for the input signal.
• What is the recommended input impedance for the INA138NA/250G4?
  The recommended input impedance for the INA138NA/250G4 is 1kΩ or less. This ensures that the input signal is not attenuated and that the amplifier operates within its specified gain range.
• Can I use the INA138NA/250G4 as a unity-gain buffer?
  Yes, the INA138NA/250G4 can be used as a unity-gain buffer. However, it's recommended to add a 1kΩ to 10kΩ resistor in series with the input signal to prevent oscillation and ensure stability.
• How do I calculate the gain of the INA138NA/250G4?
  The gain of the INA138NA/250G4 can be calculated using the formula: Gain = (Rf/Rg) + 1, where Rf is the feedback resistor and Rg is the gain resistor. The gain range of the INA138NA/250G4 is 1 to 1000.