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OPA818: opa818的跨阻,可以用数字电位器替代吗?

Part Number: OPA818
Other Parts Discussed in Thread: TPL0102-EP

您好:

看到TI有数字电位器(如TPL0102-EP ),我想用在我的TIA电路上(替代下图中的100k电阻),想知道这样做是否有啥问题呢?

因为在我的应用里,需要软件控制增益,我用这种方法控制增益,是为了提高信噪比(增益都在TIA上,后级放大电路就没有增益了),但我想知道这样做是否有啥问题。

非常感谢!