MAX1490ACPG+ datasheet by Maxim Integrated Products

MAX1490ACPG+ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the MAX1490ACPG+ to minimize EMI?
  A good PCB layout for the MAX1490ACPG+ 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 cable for the USB connection and keeping the USB traces away from the analog signals can help minimize EMI.
• How do I ensure reliable communication between the MAX1490ACPG+ and the USB host?
  To ensure reliable communication, make sure to use a USB cable that meets the USB 2.0 specification, and implement proper error handling and retry mechanisms in the firmware. Additionally, ensure that the MAX1490ACPG+ is properly configured and initialized before attempting communication.
• What are the power sequencing requirements for the MAX1490ACPG+?
  The MAX1490ACPG+ requires a specific power sequencing to ensure proper operation. The VCC pin should be powered up before the VDD pin, and the VDD pin should be powered up before the USB bus is active. Additionally, the VCC pin should be powered down before the VDD pin.
• How do I handle the 3.3V and 1.8V voltage regulators on the MAX1490ACPG+?
  The 3.3V and 1.8V voltage regulators on the MAX1490ACPG+ are internal to the device and do not require external components. However, it is recommended to use external capacitors to filter the output voltage and ensure stable operation.
• What are the thermal considerations for the MAX1490ACPG+?
  The MAX1490ACPG+ has a maximum junction temperature of 150°C. To ensure reliable operation, it is recommended to keep the device temperature below 125°C. This can be achieved by using a heat sink, improving airflow, and reducing power consumption.