REF3040AIDBZRG4 datasheet by Texas Instruments

REF3040AIDBZRG4 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the REF3040AIDBZRG4?
  Texas Instruments recommends a star-grounded layout with a solid ground plane, and placing the REF3040AIDBZRG4 close to the analog-to-digital converter (ADC) or digital-to-analog converter (DAC) it is supplying. Additionally, keep the input and output traces short and separate to minimize noise and coupling.
• How do I ensure the REF3040AIDBZRG4 is stable and does not oscillate?
  To ensure stability, make sure to decouple the input pin (VIN) with a 10uF capacitor to GND, and add a 0.1uF capacitor from the output pin (VOUT) to GND. Also, keep the output capacitor (CO) value between 10uF to 100uF, and ensure the equivalent series resistance (ESR) is less than 5 ohms.
• What is the maximum output current that the REF3040AIDBZRG4 can supply?
  The REF3040AIDBZRG4 can supply up to 10mA of output current. However, it is recommended to limit the output current to 5mA or less to ensure optimal performance and minimize self-heating effects.
• How does the REF3040AIDBZRG4 behave during power-up and power-down sequences?
  During power-up, the REF3040AIDBZRG4 has a soft-start feature that ramps up the output voltage over a period of 10ms to 20ms. During power-down, the output voltage decays rapidly to minimize power consumption. It is recommended to add a power-up reset circuit to ensure the system is properly initialized.
• Is the REF3040AIDBZRG4 suitable for high-temperature applications?
  The REF3040AIDBZRG4 is specified to operate from -40°C to 125°C. However, the device's accuracy and stability may degrade at higher temperatures. For high-temperature applications, it is recommended to consider the REF3040AIDBZRG4's temperature coefficient and to perform thorough testing and characterization.