REF1004I-1.2/2K5 datasheet by Texas Instruments

REF1004I-1.2/2K5 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for REF1004I-1.2/2K5 to minimize noise and ensure accurate voltage reference?
  Texas Instruments recommends a star-grounded layout with the REF1004I-1.2/2K5 at the center, and using a solid ground plane to reduce noise. Additionally, keep the input and output traces separate and away from high-frequency signals.
• How do I ensure the REF1004I-1.2/2K5 is stable and accurate over temperature?
  To ensure stability and accuracy over temperature, use a low-ESR capacitor (e.g., 10uF) between the VOUT and GND pins, and a 1uF capacitor between the VIN and GND pins. Also, keep the device away from heat sources and ensure good airflow.
• What is the maximum input voltage that the REF1004I-1.2/2K5 can handle?
  Although the datasheet specifies a maximum input voltage of 12V, it's recommended to limit the input voltage to 10V to ensure reliable operation and prevent damage to the device.
• Can I use the REF1004I-1.2/2K5 as a voltage regulator?
  No, the REF1004I-1.2/2K5 is a voltage reference, not a voltage regulator. It's designed to provide a stable voltage reference, not to regulate voltage. Using it as a voltage regulator may lead to instability and inaccurate output.
• How do I calculate the output impedance of the REF1004I-1.2/2K5?
  The output impedance of the REF1004I-1.2/2K5 can be calculated using the equation: Zout = (ΔVout / ΔIout) || R_out, where R_out is the output resistance specified in the datasheet (typically around 10 ohms).