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应用 INA214 电流采样运算放大器,输入端电压过高后,出现损坏 INA214 芯片

Other Parts Discussed in Thread: INA214

  应用 INA214 电流采样运算放大器,输入端电压过高后,出现损坏 INA214 芯片,按 INA21x 数据手册第 20 页,参考推荐的过压保护图 27 与图 28,

已经按照 INA214 推荐保护电路修改电路图3,


一种采用双稳压二极管,另一种采用双路背靠背+单稳压二极管,分别按 2 种 TI 推荐保护图进行焊接,分别进行输入端过压测试,前置过压保护功能都失效仍然损坏 IN214。

   以上,请指导一下 IN214 输入端口过压保护电路问题,谢谢!