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信号采集

Other Parts Discussed in Thread: ADS1675

交流信号,几微伏至几十微伏之间,频率500kHz---2MHz。请问放大器放大多少倍比较好啊?AD采样请推荐几款合适的芯片,有方案的高酬劳诚求。为什么采集卡都那么贵,好点的要几万块?24位的很少,即使有采样率也很低。我看ads1675是24位的,采样率也有4M,适合用吗?请大神推荐下方案啊,不胜感激。有会做的高酬劳付出。