Hello Marco, You can use ADS8902B (20Bit/500ksps) or ADS8900B (20Bit/1Msps), both ADCs support ADC-Clock-Master(Source-Synchronous) mode of operation, the clock source can be selected by Bit 7-6 (SSYNC_CLK_SEL) of SDO_CNTL register, either external SCLK or Internal clock can be selected. For your case, ADC's internal clock should be selected as the clock source for the ADC-Clock-Master mode which will be presented on the RVS pin. Also, the clock frequency can be selected by SDO_CNTL register as INTCLK,INTCLK/2 or INTCLK/4. The conversion data will be shifted out to SDO according to this synchronous output clock on the RVS pin. Please check Figure 5, Figure 74 and Table 13 in the ADS890xB's datasheet. Please let me know if you have further question, thanks. Best regards Dale
↧