Texas Instruments recommends a star-ground configuration, with the REF6145IDGKT placed close to the analog-to-digital converter (ADC) or digital-to-analog converter (DAC) it is supplying. Keep the device away from high-current or high-frequency signals, and use a solid ground plane to reduce noise.
To ensure stability and accuracy, use a high-quality, low-ESR capacitor (e.g., 10 μF, X5R or X7R type) between the VOUT and GND pins. Additionally, follow proper PCB layout guidelines, and consider using thermal vias to dissipate heat.
The REF6145IDGKT can drive up to 10 nF of capacitive load. Exceeding this limit may cause oscillations or instability. If a larger capacitive load is required, consider adding a buffer amplifier or using a different reference voltage device.
The output voltage tolerance can be calculated using the datasheet specifications for initial accuracy, temperature coefficient, and long-term stability. A rough estimate can be obtained by adding the initial accuracy (±0.05% for the REF6145IDGKT) to the temperature coefficient (±10 ppm/°C) and long-term stability (±0.05% over 1000 hours).
Yes, but with some limitations. The REF6145IDGKT is designed to provide a 4.096 V output, but it can be used as a reference for ADCs or DACs with different voltage ranges by using a resistive divider or an amplifier to scale the output voltage. However, this may affect the accuracy and noise performance of the reference voltage.
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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.
