Compiler/ADS1291: ads1291 Lead-off and measure question

xiaoluhua9

Part Number: ADS1291

Tool/software: TI C/C++ Compiler

Hi Ti,

I am using ads1291, I have some questions. my register setting is:

//CONFIG1
0x00, /* 125 SPS */
//CONFIG2
0xE0,
//LOFF
0xF0,
//CH1SET (PGA gain = 1)
0x10,
//CH2SET (PGA gain = 6)
0x81,
//RLD_SENS (default)
0x23,//0x2C,
//LOFF_SENS (default)
0x03,
//LOFF_STAT
0x00,
//RESP1
0x02,
//RESP2
0x07,
//GPIO
0x0C

schematic diagram is:

1、It is ok to test the simulator signal(The following video), The three dots on the screen are IN1P-OFF、IN1N_OFF、RLD_STA, red means 1, green means 0, you can see that IN1P-OFF is always 1, Can you help me analyze it.

2、However, There's a problem measuring human signals, reading zero all the time, you can see that IN1P-OFF also is always 1,Looking forward to your reply.