ADS131E08S: ADC Data Rate

Hi Marcio,

You can adjust the data rate on the ADS131E08 using an external clock. You need to consider a few things though - first is that the modulator clock (fMOD) is fCLK/2 (see section 9.3.5) With the DR bits in CONFIG1 set for 010, the oversampling rate is set to 64. With the default internal clock of 2.048 MHz, the data rate is fMOD or 1.024 MHz / 64 = 16 kSPS. You can turn that equation around to determine the clock you would need for 10.24 kSPS -> fMOD would be 655360 Hz and fCLK would be 2X, or ~1.31 MHz. Using a 5V supply, the master clock can be between 1.0 MHz and 2.25 MHz, so this should work.