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请问VCA821的增益调节范围只能是-20db~+20db吗? 然后带宽有点疑问

Other Parts Discussed in Thread: VCA821

本人菜鸟,我想做一个12MHZ,0-40db的增益控制部分,不晓得vca821满足不呢? ,然后我有个菜鸟问题,这张图后面的信号带宽,是增益在多大情况下的带宽呢? 是整个增益调节范围内的带宽吗?