MAX490ESA+ datasheet by Maxim Integrated Products

MAX490ESA+ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the MAX490ESA+ to minimize EMI?
  A good PCB layout for the MAX490ESA+ involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the power supply. Additionally, using a shielded enclosure and minimizing the length of the input and output traces can help reduce EMI.
• How do I ensure the MAX490ESA+ is properly powered and decoupled?
  To ensure proper powering and decoupling of the MAX490ESA+, use a high-quality power supply with low ripple and noise, and add decoupling capacitors (e.g., 10uF and 100nF) close to the device's power pins. Also, use a low-ESR capacitor (e.g., 10uF) on the output pin to filter the output voltage.
• What is the maximum input voltage that the MAX490ESA+ can handle?
  The MAX490ESA+ can handle input voltages up to 36V, but it's recommended to operate within the specified input voltage range (12V to 24V) for optimal performance and reliability.
• How do I adjust the output voltage of the MAX490ESA+?
  The output voltage of the MAX490ESA+ can be adjusted by using an external resistor divider network connected to the FB (feedback) pin. The output voltage can be calculated using the formula: Vout = 1.25 x (R1 + R2) / R2, where R1 and R2 are the resistors in the divider network.
• What is the maximum output current that the MAX490ESA+ can deliver?
  The MAX490ESA+ can deliver up to 1A of output current, but it's recommended to operate within the specified output current range (0.5A to 0.8A) for optimal performance and reliability.