Hi Christian, For your command A1A8C0FF or E1A8C0FF, you are setting: External clock (Bit 29=1) 2Vref Input Range for pair A, B,C and D (Bit 24,23,21 and 19=1) Internal reference buffer is disabled (Bit 14=1) REFDAC: you may keep it 0x3FF which is default value These are different from what you want(Internal clock, 4Vref, buffer us needed etc.) you will have to correct your command. After you send correct command to ADS8528 , send two CONVST_x pulses to ADC which is required to update the register, please refer Figure 40 (busy signals) and the description about bit 30 of CR register(two accesses for reading). Regards Dale
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