REF1941AIDDCR datasheet by Texas Instruments

REF1941AIDDCR Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the REF1941AIDDCR?
  Texas Instruments recommends a star-ground configuration and a solid ground plane to minimize noise and ensure optimal performance. Additionally, keep the input and output traces separate and as short as possible to reduce noise coupling.
• How do I ensure the REF1941AIDDCR is stable and doesn't oscillate?
  To ensure stability, make sure to decouple the input and output pins with suitable capacitors (e.g., 10nF to 100nF) and use a low-ESR output capacitor (e.g., 10uF to 22uF). Also, avoid using long traces or wires that can introduce inductance and cause oscillation.
• What is the maximum capacitive load that the REF1941AIDDCR can drive?
  The REF1941AIDDCR can drive up to 10nF of capacitive load. Exceeding this limit may cause instability or oscillation. If a larger capacitive load is required, consider adding a buffer amplifier or using a voltage reference with a higher drive capability.
• How do I calculate the output voltage tolerance of the REF1941AIDDCR?
  The output voltage tolerance of the REF1941AIDDCR is specified as ±0.5% (max) over the operating temperature range. To calculate the output voltage tolerance, multiply the nominal output voltage (e.g., 4.096V) by the tolerance percentage (e.g., 0.5%). For example, the output voltage tolerance would be ±20.48mV for a 4.096V output voltage.
• Can I use the REF1941AIDDCR in a high-temperature environment?
  The REF1941AIDDCR is specified to operate up to 125°C (TJ). However, the device's accuracy and stability may degrade at higher temperatures. If your application requires operation above 125°C, consider using a voltage reference with a higher temperature rating or implementing additional temperature compensation measures.