A good PCB layout for the REF3325AIDBZR involves placing the device close to the analog-to-digital converter (ADC) or digital-to-analog converter (DAC), using a solid ground plane, and minimizing the length of the traces connecting the device to the ADC or DAC. Additionally, it's recommended to use a bypass capacitor (e.g., 10nF) between the VOUT pin and GND to filter out high-frequency noise.
To ensure stability and accuracy over the entire operating temperature range, it's essential to follow proper PCB layout guidelines, use a stable power supply, and minimize thermal gradients on the board. Additionally, consider using a temperature compensation circuit or a thermistor to compensate for temperature-related drift.
The recommended input voltage range for the REF3325AIDBZR is 4.5V to 18V. The output voltage remains stable and accurate as long as the input voltage is within this range. However, if the input voltage drops below 4.5V, the output voltage may decrease, and if it exceeds 18V, the device may be damaged.
To prevent output voltage glitches during power-up and power-down sequences, it's recommended to follow a controlled power-up sequence, where the input voltage is ramped up slowly (e.g., 10ms) to allow the internal circuitry to stabilize. During power-down, the input voltage should be ramped down slowly to prevent output voltage glitches.
The typical output impedance of the REF3325AIDBZR is around 0.2Ω. This low output impedance ensures that the output voltage remains accurate and stable, even with varying load currents. However, if the output impedance is not properly considered in the system design, it may affect the output voltage accuracy, especially at high frequencies.
REF3325AIDBZR datasheet
by Texas Instruments
