现需要为一个pd范围约在160-280uA的光电传感芯片选择一超低噪声跨阻放大器(最好增益可调,噪声nA及以下),OPA857的可测电流范围过小,寻求合适的选型推荐。如果可以,还希望推荐几个同样低噪声的后端ADC芯片,谢谢!
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您好,没有像 OPA857这样内部集成增益电阻(增益可调)的TIA推荐给您,需要您使用低噪声运放外部搭建增益电阻电路。如下低噪声运放:
您可参考下面链接中参考设计的设计步骤:
1、1 MHz, Single-Supply, Photodiode Amplifier Reference Design