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ADS1299采集数据问题

用ADS1299采集数据

采样数据结果有问题

ADS1299配置如下:

          WREG(CONFIG1,0x96);

          WREG(CONFIG2,0xD0);

          WREG(CONFIG3,0xE0);

          WREG(LOFF,0x00);

          WREG(CH1SET,0x05);

          WREG(CH2SET,0x05);

          WREG(CH3SET,0x05);

          WREG(CH4SET,0x05);

          WREG(CH5SET,0x04);

          WREG(CH6SET,0x04);

          WREG(CH7SET,0x04);

          WREG(CH8SET,0x04);

         

          WREG(BIAS_SENSP,0x00);

          WREG(BIAS_SENSN,0x00);

          WREG(LOFF_SENSP,0x00);

          WREG(LOFF_SENSN,0x00);

          WREG(LOFF_FLIP,0x00);

         

          WREG(GPIO,0x00);

          WREG(MISC1,0x00);

          WREG(MISC2,0x00);

(1)测量得到温度传感器的AD值:05A311(hex);

(2)测量得到test信号AD值:000847(hex)

根据datasheet描述温度计算公式:

05A311转换成十进制等于369425,电压值=369425*4.5/(2^23-1) = 0.198175V = 198175uv,明显数据不对;

TEST测试结果也一样,不准确,请问下这个是怎么回事呢?谢谢!

Kailyn Chen:

这款是ADC的芯片,帮你转到对应版块。

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