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CAN总线IC发送对电源有影响?

Other Parts Discussed in Thread: SN65HVD232

使用的CAN总线IC是SN65HVD232,测试过程中发现对3.3V有影响。3.3V是5V经过一颗LDO得来的,单片机和CAN芯片是同一路供电。

正常发送3.3V有波动,

只接收无影响:

给CAN芯片加去耦电容没有任何改善

请问TI的大神,这种情况怎么解决,还是说CAN芯片的电源得单独供电。