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4.5v电压基准芯片

Other Parts Discussed in Thread: TL431, REF5045, LM4040

请问各位大虾,我现在想用sonix-2711单片机的AD来做锂电池电压的采样,但是要求精度特别高,所以我想用外部参考电压来做,所以想到了TL431,但是431最高的精度是在电压为2.495的时候,这样的话参考电压太低了,我想找个精度和431差不多的东东,但是电压基准在4.5V左右就行,请各位大虾给我推荐一个这样的电压基准芯片!谢了