SBAU206B april 2015 – may 2023 ADS1262 , ADS1263
Figure 3-11 shows the different clocking options for the ADS1263EVM. The default configuration connects a 0-Ω resistor (R44) between the ADS1263 CLKIN pin and ground. Shorting CLKIN to ground automatically chooses the ADS1263 internal 7.3728-MHz oscillator to be the ADC clock source.
An external clock can also be provided to the ADC. Figure 3-11 shows multiple ways to apply an external clock. First, an external 7.3728-MHz oscillator can be installed by using component Y1. The supply voltage for the recommended clocking component can be a maximum of 3.3 V and is tied to DVDD as a result. Review the data sheet parameters for any alternate components to confirm operation with these settings. See Section 5 if the selected clock requires a different DVDD voltage. In all cases, using an external clock at Y1 requires installing a 0-Ω resistor at R31 and removing R44.
The ADS1263EVM also offers the option of connecting an external clock using SMA connector J7. Choosing this clock option also requires installing a 0-Ω resistor at R37 and removing R44. However, neither of these external clock options are installed by default.