REF3225AMDBVREP datasheet by Texas Instruments

REF3225AMDBVREP Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the REF3225?
  A good PCB layout for the REF3225 involves keeping the input and output traces short and separate, using a solid ground plane, and placing the device close to the power supply. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
• How do I ensure the REF3225 is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended capacitor values and placement, keep the input and output impedance matched, and avoid using long traces or wires that can cause oscillations. Also, ensure the device is properly decoupled and the power supply is clean and stable.
• What is the maximum output current of the REF3225?
  The maximum output current of the REF3225 is 10mA. Exceeding this current may cause the device to overheat or malfunction. It's recommended to use an external buffer amplifier if higher output currents are required.
• Can I use the REF3225 as a voltage reference for an ADC?
  Yes, the REF3225 can be used as a voltage reference for an ADC. However, it's essential to ensure the REF3225 is properly decoupled and the ADC's input impedance is matched to the REF3225's output impedance to avoid noise and errors.
• How do I calculate the total error budget of the REF3225?
  The total error budget of the REF3225 includes the initial accuracy, temperature coefficient, and long-term stability. Calculate the total error budget by adding the individual errors in ppm (parts per million) and converting to a percentage of the output voltage.