Dear all,
we are using the ADS1298 (BGA) as a ADC. When trying to access the registers, I found that the signals probably are not received by the IC and after checking the VCAP1 voltage, which is supposed to be >1.1V, I measured only 500mV.
Does the VCAP1 always rise as soon the supply voltage is applied or does this also depend on the power-up sequence?
Does anybody know why this happens? Can a short at the capacitor between VREFP and GND during the first supply destroy the opamp internally?
I really appreciate your help. Thank you so much in advance.
Best regards
Gerad