我用INA826和PGA281和INA128搭建了一个程控小信号放大电路,PGA281的5个控制脚我是在电路板上直接用下拉电阻到地,再用排针引出控制脚,虽然能工作,但是上电后电流达110mA,PGA281发热,如果给控制脚一个高电平的话,电流直接到好几百mA,由于电源有保护措施,才不至于烧掉,请问这是什么情况,电路图贴在附件
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