The recommended PCB layout for the MAX97220BETE+ is to keep the analog and digital grounds separate, use a solid ground plane, and keep the input and output traces short and away from noise sources. A 4-layer PCB with a dedicated analog ground layer is recommended. Maxim Integrated provides a reference layout in the evaluation kit documentation.
To optimize the performance of the MAX97220BETE+ in a noisy environment, use a low-pass filter on the input, keep the device away from noise sources, and use shielding or a Faraday cage to reduce electromagnetic interference (EMI). Additionally, use a high-quality power supply with low ripple and noise, and decouple the power supply lines with capacitors.
The maximum input voltage that the MAX97220BETE+ can handle is 5.5V, which is the absolute maximum rating. However, the recommended input voltage range is 2.7V to 5.5V. Exceeding the maximum input voltage can damage the device.
The gain of the MAX97220BETE+ can be configured using external resistors. The gain is set by the ratio of the feedback resistor (Rf) to the input resistor (Ri). The recommended gain setting resistors are provided in the datasheet. The gain can be set to 1, 2, 4, or 8, depending on the application requirements.
The power-down mode of the MAX97220BETE+ is a low-power state that reduces the current consumption to less than 1µA. To enter power-down mode, pull the SHDN pin low. In power-down mode, the device is disabled, and the output is high-impedance. This mode is useful for power-saving applications.
MAX97220BETE+ datasheet
by Maxim Integrated Products
