INA321E/250G4 datasheet by Texas Instruments

INA321E/250G4 Frequently Asked Questions (FAQs)

• What is the maximum power dissipation of INA321E/250G4?
  The maximum power dissipation of INA321E/250G4 is 670mW, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (RθJA) of 125°C/W.
• How do I layout the PCB to minimize noise and ensure optimal performance?
  To minimize noise and ensure optimal performance, it is 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 away from each other. Additionally, the INA321E/250G4 should be placed close to the signal source and the output should be routed to the ADC or other downstream components.
• What is the recommended input impedance for optimal performance?
  The recommended input impedance for optimal performance is 1kΩ to 10kΩ. This impedance range allows for optimal common-mode rejection and noise performance.
• Can I use the INA321E/250G4 in a single-supply configuration?
  Yes, the INA321E/250G4 can be used in a single-supply configuration. However, the input common-mode voltage range is limited to VCC-1.5V to VCC+0.5V, and the output voltage swing is reduced. It is recommended to use a dual-supply configuration for optimal performance.
• How do I calculate the gain error and offset voltage of the INA321E/250G4?
  The gain error and offset voltage of the INA321E/250G4 can be calculated using the formulas provided in the datasheet. The gain error is typically ±0.1% and the offset voltage is typically ±500μV. These values can be trimmed using external resistors or calibrated using software.