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关于delta sigma ADC外部滤波器的问题

Other Parts Discussed in Thread: ADS1274, THS4140

本人打算使用ADS1274 ADC进行前端信号采集,信号带宽大概为1Khz 至 11Khz,使用ADC的快速采样模式,外部振荡器频率为32.768MHz。 现在遇到的问题是,不知道前端信号调理过程中是否还需要设计AA Filter (Anti-Aliasing)?数据手册说只需要在前端加一个Simple Pole RC filter即可,请问这就足够了么?

感谢