The recommended PCB layout for the MAX821RUS+T involves placing the device close to the power source, using a solid ground plane, and keeping the input and output traces short and separate to minimize noise and EMI. Additionally, it's recommended to use a 10nF capacitor between the VIN and GND pins to filter out high-frequency noise.
To ensure proper biasing, connect the VCC pin to a stable voltage source between 2.7V and 5.5V, and the GND pin to a solid ground plane. The VCC pin should be decoupled with a 1uF capacitor to filter out high-frequency noise. Additionally, the input voltage (VIN) should be within the specified range of 0V to 5.5V.
The response time of the MAX821RUS+T when detecting an undervoltage condition is typically around 10us to 20us. This is due to the internal filtering and hysteresis of the device, which helps to prevent false triggering and ensure reliable detection of undervoltage conditions.
Yes, the MAX821RUS+T is rated for operation up to 125°C, making it suitable for high-temperature applications. However, it's essential to ensure that the device is properly derated for temperature and that the PCB layout and thermal management are designed to handle the increased temperature.
The MAX821RUS+T has an open-drain output that can be connected directly to a microcontroller or other digital logic. The output is active-low, meaning it will pull low when an undervoltage condition is detected. A pull-up resistor is typically required to pull the output high when no undervoltage condition is present.
MAX821RUS+T datasheet
by Maxim Integrated Products
