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BQ76930 TS1温度采集问题

Other Parts Discussed in Thread: BQ76930

用两片BQ76930级联来管理16串的电池,每个BQ76930采集8串电压值和两路温度值,目前16个电压值都正常。但是温度采集一直有问题,TEMP_SEL在芯片初始化后有置1,TS1脚量得的波形是脉冲的,峰峰值有1.8V,这是将NTC直接换用10K电阻测试的结果,这个波形正常吗?部分电路图也上传了,请TI的各位专家帮忙找下原因