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ADS1198/1298的特点就是利用高精度的ADC来采样小信号,ADC的resolution 足够大之后,小信号也足以分辨出来。 如你所说的即使低10bit可用,ADC RTI noise很小,对信号的识别是没有问题的。 在传统的ECG设计中,大多数用的都是12bit ADC,为了达到一定精度,必须把前极输入信号范围尽可能放大到接近ADC满量程以提高分辨率。
需要指出的是ADS1298最适合做心电产品,ADS1198适合做低端多参监护产品。
ADS1298 更多信息,请访问:http://focus.ti.com.cn/cn/docs/prod/folders/print/ads1298.html
ADS1198更多信息,请访问:http://focus.ti.com.cn/cn/docs/prod/folders/print/ads1198.html