Hi
We are using ADS1292 and we could be able to get ADC O/P(voltage) for the positive ADC I/P voltage successfully. No issue in reading positive voltage from ADC.
Our requirement is to measure the input voltage both positive and negative but we couldn't read appropriate negative voltage. We are getting wrong values.
Configuration:
We are using Channel2 and Channel1. Channel2 is for other purpose. This requirement is for channel1.
VrefP- 4.033
VrefN- Gnd
ADC I/P - Differential voltage of IN1P and IN1N
Our Register settings: [Note - Our project in not ECG]
CH1SET - 0x10 , RLD_SENS - 0x2C , LOFF_SENS - 0x0F , LOFF_STAT - 0x48, CONFIG1=0x02 ,CONFIG2=0xF8
Issue Faced:
If we provide negative input to ADC and we couldn't correct output from ADC. I summarized some of the values for your reference.
ADC-I/P ADC-O/P
-4.285 0.00055288
-4.285 0.00055288
-4.285 0.00055423
-4.285 0.00055423
-0.483 -0.0006115
-0.378 -0.0006173
-0.29 -0.0006187
-0.208 -0.0006201
-0.03 -0.0006278
We require your advise on reading negative voltages. Please suggest on priority.
Regards
