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求ADS1256的电源芯片

Other Parts Discussed in Thread: ADS1256, LMR14203, ADS1255, LMP2022, OPA2333, LMC6482, LMP2011

我需要测8路单端电压信号,所以采用了ADS1256,,24位A/D芯片。24V的供电电压,需要转成5V和3.3V的电压,那么需要什么型号电源芯片才可以满ADS1256有效位数的至少达到20位呢?