Texas Instruments recommends a star-ground connection, with the REF35409QDBVR placed close to the analog-to-digital converter (ADC) or digital-to-analog converter (DAC), and using a low-impedance power supply. Additionally, keep the device away from high-current or high-frequency signals, and use a ground plane to reduce noise.
Use a low-ESR capacitor (e.g., 10uF) between the VCC and GND pins, and a smaller capacitor (e.g., 100nF) between the VCC and BYPASS pins. This helps to filter out noise and ensure a stable voltage supply. Additionally, use a low-dropout regulator (LDO) or a high-PSRR power supply to minimize power supply noise.
The output impedance of the REF35409QDBVR is typically around 0.5 ohms. This low output impedance ensures a stable voltage reference, but it also means that the device can source or sink a significant amount of current. Be sure to consider this when designing your circuit, especially when using the REF35409QDBVR as a reference for high-impedance loads.
The REF35409QDBVR has a maximum operating temperature of 125°C. To ensure reliable operation, use a thermal pad or heat sink to dissipate heat, especially in high-temperature environments. Additionally, consider using a thermally conductive material (e.g., copper or aluminum) for the PCB, and avoid placing the device near heat sources or high-power components.
The REF35409QDBVR has a higher accuracy (±0.05%) and lower noise (10ppm/√Hz) compared to the REF3425 (±0.1% and 20ppm/√Hz). The REF5025 has a higher output current capability (10mA) compared to the REF35409QDBVR (5mA). Choose the device based on your specific application requirements for accuracy, noise, and output current.
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REF35409QDBVR Overview
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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.
