XTAL1/CLKIN is the external clock input to the ADC and can be supplied from a clock source or by using a crystal (along with the XTAL2 pin). Figure 36 shows the configuration for the two clock input options.
Input the clock directly to the XTAL1/CLKIN pin and leave the XTAL2 pin floating when using a direct clock source.
Connect the crystal and load capacitors as shown in Figure 36b to the XTAL1/CLKIN and XTAL2 pins. Place the crystal and crystal load capacitors close to the ADC pins using short, direct traces. Connect the load capacitors to the digital ground. Do not connect any other external circuit to the crystal oscillator. Table 5 lists recommended crystals for use with the ADS131A0x. The crystal oscillator start-up time is typically 5 ms, but can be longer depending on the crystal characteristics.
|MANUFACTURER||FREQUENCY||OPERATING TEMPERATURE RANGE||PART NUMBER|
|Abracon||16.384 MHz||–40°C to +125°C||ABLS-16.384MHZ-L4Q-T|
|Abracon||16.384 MHz||–40°C to +85°C||ABM3C-16.384MHZ-D4Y-T|
|ECS||16.384 MHz||–40°C to +85°C||ECS-163-18-5PXEN-TR|