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OPA322: 光敏二极管电流放大,无法达到1M频率

Part Number: OPA322

光敏二极管电流放大,参考官方推荐的OPA322设计(有修改相应的阻容参数),但无法达到1M频率。电流5~10uA ,频率 1MHZ,请问有没有其他的芯片可以满足要求?OPA322本身20MHZ带宽是无法实现该应用吧?