Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital signals separate. Use short, direct traces for the analog inputs and outputs, and avoid crossing digital signals over analog signals.
Calibration involves applying a known input voltage and adjusting the offset and gain registers to achieve the desired output code. Refer to the datasheet for a detailed calibration procedure and example code.
The maximum sampling rate of the ADS8509IBDWR is 200 kSPS. Higher sampling rates increase power consumption, so it's essential to balance sampling rate with power consumption requirements.
The ADS8509IBDWR has built-in overvoltage protection up to 18 V. For undervoltage conditions, use a voltage supervisor or a power-on reset circuit to ensure the ADC is not enabled until the supply voltage is within the recommended operating range.
Use a 10 μF ceramic capacitor and a 1 μF film capacitor in parallel, placed close to the power pins. Add a 10 Ω resistor in series with the power supply to filter out high-frequency noise.
ADS8509IBDWR datasheet
by Texas Instruments
