Hi,
I'm testing eeg using ads1292.
I got a problem when using RLDIN.
I made a circuit to use four electrodes.
- Ch1 : IN1P
- Ch2 : IN2P
- Reference : RLDIN
- Ground : RLDOUT
The problem is waveform direction of ch1 and ch2 data.
If i use dry type electrode, ch2 waveforn is reversed by ch1 waveform.
(If i use 3M electrode, ch1 waveform and ch2 waveform become same.)
Why does the direction of the two channels change in this case?
This is my register setting.
0x00, //ID
0x01, //CONFIG1 : 250SPS
0xF0, //CONFIG2 : enable Lead-off comparator, enable reference buffer, reference 4V
0x10, //LOFF
0x62, //Channel1
0x62, //Channel2
0x35, //RLD_SENS
0x0F, //LOFF_SENS
0x40, //LOFF_STAT
0x02, //RESP1
0x03, //RESP2
0x03 //GPIO
And, this is my schematic.