INA219AIDCNRG4 datasheet by Texas Instruments

INA219AIDCNRG4 Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be measured by the INA219?
  The INA219 can measure bus voltages up to 26V, but the maximum voltage that can be applied to the VIN+ pin is 28V.
• How do I calibrate the INA219?
  The INA219 has an internal calibration circuit that sets the full-scale range of the current measurement. No external calibration is required, but the device must be configured properly using the calibration register (RCAL) to ensure accurate measurements.
• What is the purpose of the RSHUNT resistor in the INA219?
  The RSHUNT resistor is used to sense the current flowing through the shunt resistor (RSHUNT) and convert it to a voltage that can be measured by the INA219. The value of RSHUNT determines the full-scale range of the current measurement.
• How do I handle overcurrent conditions with the INA219?
  The INA219 has an overcurrent detection feature that can be enabled to detect overcurrent conditions. When an overcurrent condition is detected, the device sets the OVER flag in the maskable interrupt register. The host can then take action to protect the system from damage.
• What is the purpose of the VBUS pin on the INA219?
  The VBUS pin is used to measure the bus voltage (VBUS) of the system. The INA219 can measure VBUS voltages up to 26V and provides a 12-bit digital representation of the voltage measurement.