SBAU206B april 2015 – may 2023 ADS1262 , ADS1263
Figure 3-10 shows all ADC connections. Each power-supply and reference connection has a 1-µF decoupling capacitor. Place these capacitors as close as possible to the ADC pins and make sure each component has a low-impedance connection to the GND plane.
Each ADC digital pin has a 49.9-Ω series resistor in series with the trace. These resistors smooth the edges of the digital signals to minimize overshoot and ringing. A resistor is most important on the serial clock (SCLK) trace because the SCLK signal can toggle as quickly as 40 MHz. Resistors on the other pins are not strictly required, though these components can be included in the final design to improve digital signal integrity.