A good PCB layout for the MAX11801GTC/V+ involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the analog signal sources. Additionally, it's recommended to use a 4-layer PCB with a dedicated analog power plane and a dedicated digital power plane.
To ensure proper calibration, follow the calibration procedure outlined in the datasheet, which involves applying a known input voltage and adjusting the internal calibration registers. It's also important to ensure that the device is operated within the recommended temperature range and that the input signals are within the specified voltage range.
Using an external reference voltage can provide better accuracy and stability, but it requires careful consideration of the external reference voltage's accuracy, temperature coefficient, and noise performance. Additionally, the external reference voltage must be within the specified range of the MAX11801GTC/V+ and must be properly decoupled to prevent noise coupling.
If the MAX11801GTC/V+ is not converting data at the expected rate, check the clock frequency, clock stability, and the conversion mode. Ensure that the device is properly configured and that the input signals are within the specified voltage range. Also, check for any potential noise or interference issues that may be affecting the conversion rate.
The MAX11801GTC/V+ requires a specific power sequencing to prevent damage to the device. The recommended power sequencing is to apply the analog power supply (AVDD) before the digital power supply (DVDD), and to ensure that the analog power supply is stable before applying the digital power supply.
MAX11801GTC/V+ datasheet
by Maxim Integrated Products
