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opa544的做电压供应问题

Other Parts Discussed in Thread: TLV5638, OP07, OPA544, OPA277

有tlv5638  DA转换后,然后通过该电路。以实现电压可控输出。

但是,无论DA如何改变,,输出都是钳在10.12v

 

而且前面op07输出为反电压。

请大家能给出比较的好的分析,和修改意见。(Ps:opa544我是用正负12V供电的,只要求能输出0-10V就OK了。不知,直接用opa544接DA输出行不行)