A good PCB layout for the MAX5479ETE+ involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the power supply. Additionally, it's recommended to use a 4-layer PCB with a dedicated analog layer to minimize noise.
The MAX5479ETE+ requires a single 2.7V to 5.5V power supply. It's recommended to power the device with a clean, low-noise power supply, and to sequence the power-on in the following order: VCC, then VLOGIC. The power-down sequence should be reversed.
A 0.1uF to 1uF ceramic capacitor is recommended for the BYPASS pin. This capacitor helps to filter out high-frequency noise and ensures the device's internal reference voltage remains stable. A larger capacitor value can be used, but it may affect the device's start-up time.
The MAX5479ETE+ output voltage can be configured using external resistors R1 and R2. The output voltage range is limited to 0.8V to 5.5V, and the device can source up to 50mA of current. The output voltage can be calculated using the formula: VOUT = (R2 / R1) * (1.25V).
The MAX5479ETE+ has a thermal shutdown feature that activates when the junction temperature exceeds 150°C. To ensure reliability, it's recommended to keep the device's operating temperature below 125°C. A good thermal design, including a heat sink or a thermal pad, can help to dissipate heat and reduce the risk of thermal shutdown.
MAX5479ETE+ datasheet
by Maxim Integrated Products
