现在需要对nA级的微弱电流检测,前置用跨阻放大,频率在1M左右,初步选择LMH6629、OPA657、OPA847.哪种运放比较合适,请帮忙看看!
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建议您可以看看LOG114,请参考这个链接:http://www.ti.com.cn/product/cn/LOG114?keyMatch=log114&tisearch=Search-CN-Everything
对数放大器直接用来做前置的I-V吗,后级还需要放大吗,我的信号动态范围不是很大