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ADS8685: 选型帮助

Part Number: ADS8685
Other Parts Discussed in Thread: ADS117L11, ADS8318

TI的同事你们好,我正在寻找一款16bit,500kHz采样率以上的ADC,ADS8685比较符合我的需求,但是有个输入信号的问题请教一下,

我的输入信号P端和N端都是0.8V-1V左右的信号,如果使用ADS8685,N端信号是不是就被强制拉到GND,内部PGA无法直接放大P端和N端之间的差值信号?

如果是这样的话,请帮忙推荐一款符合要求,支持差分输入的采样芯片