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.
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.
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.
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.
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.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
