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OPA817: 跟818一样的封装，为什么两者的热阻不一样呢？

mingLiang
Intellectual 455 points
Part Number: OPA817
Other Parts Discussed in Thread: OPA818,

尊敬的TI工程师您好:

我用了opa818，但是有一个通道的Cf需要变大，需要换成opa817才能稳定，否则震荡。

但是我在对比两个运放的参数时候，有一个疑问，两颗运放明明是一样的封装，可以pintopin兼容，为啥热阻不一样呢！（我也买来了实物）

非常感谢！