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VCA810程控芯片

Other Parts Discussed in Thread: VCA810, DEM-VCA-SO-1A

TI的资料上说VCA810,是一款性能很好的芯片,但是几次使用它都没有成功,这是我最近调试的电路,
出现的问题如下,一,该电路不能能放大直流,但是我阅读芯片资料时,却明显说了它是一款直流耦
合的程控芯片;二,在测试中输入正弦信号,把放大倍数调为0dB,发现当峰峰值达到1点几伏时,输
出波形已经变形,而且频率低时理论增益与实际增益相差很大,频率高时,反而误差小。请教