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ADS5404同步问题采集结果变差问题

Other Parts Discussed in Thread: ADS5404, ADS5402

使用ADS5404/ADS5402两片同步采集,发现将0x38的sync_ON寄存器置1后,采集结果频谱出现了周期分量,只有关闭SYNC_ON寄存器后才会变好,请问这是什么原因造成的,我的0x0e和0x0f两个寄存器中SYNC_SEL选择的是“Sync is derived from SYNC input pins”

附:问题频谱图:

  • 您好,

    SYNC_SEL选择 Sync is set to one shot (one time synchronization only)试一下,在数据手册MULTI DEVICE SYNCHRONIZATION章节有描述“The SYNC input signal should be a one time pulse to trigger the periodic 5-bit counter for SYNCOUT or a periodic signal repeating every 32 CLKIN clock cycles”