Texas Instruments recommends a star-ground connection, with the REF3333AIDCKTG4 placed close to the analog-to-digital converter (ADC) or digital-to-analog converter (DAC) it is referencing. Additionally, use a low-impedance power supply, and keep the voltage reference input and output traces short and away from noisy digital signals.
Use a low-ESR capacitor (e.g., 10uF) between the VCC and GND pins, and a smaller capacitor (e.g., 100nF) between the VIN and GND pins. Ensure the power supply is well-regulated and has a low noise floor. Decouple the REF3333AIDCKTG4 from the power supply using a ferrite bead or a pi-filter.
The REF3333AIDCKTG4 has a typical start-up time of 10ms. Ensure that your system's power-on sequence allows for this start-up time before using the voltage reference output. You may need to add a delay or use a power-on reset circuit to ensure the REF3333AIDCKTG4 is stable before using its output.
Use a low-pass filter (e.g., an RC filter) to attenuate the output noise and ripple. You can also use a noise-reducing capacitor (e.g., 10uF) between the OUT and GND pins. Additionally, consider using a voltage follower or an op-amp to further buffer and filter the output signal.
The REF3333AIDCKTG4 has a typical temperature coefficient of 10ppm/°C. This means that the output voltage will change by 10ppm for every 1°C change in temperature. To minimize the impact of temperature on your system's accuracy, consider using temperature compensation or calibration techniques, or selecting a voltage reference with a lower temperature coefficient.
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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.
