Texas Instruments recommends a star-ground connection, with the REF7040QFKHT 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 switching nodes and use a solid ground plane to reduce noise.
Use a low-ESR capacitor (e.g., 10 μF) connected between the VCC and GND pins, and a 0.1 μF capacitor connected between the VCC and BYPASS pins. This helps to filter out noise and ensure stable operation. Additionally, use a high-quality power supply with low ripple and noise.
The typical start-up time for the REF7040QFKHT is around 10 ms. This means that the device requires a short settling time before the output voltage stabilizes. Engineers should ensure that their system design takes this start-up time into account, especially when using the REF7040QFKHT as a reference voltage for ADCs or DACs.
During power-down or brownout conditions, the REF7040QFKHT's output voltage will decay to zero. When power is restored, the device will restart and output a stable voltage after the typical start-up time. Engineers should ensure that their system design can handle this behavior and provide adequate power supply filtering to prevent unwanted resets or errors.
The recommended operating temperature range for the REF7040QFKHT is -40°C to 125°C. Temperature affects the device's performance, with a typical temperature coefficient of 10 ppm/°C. Engineers should ensure that their system design takes into account the temperature range and its potential impact on the REF7040QFKHT's accuracy and stability.
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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.
