• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 47 subscribers
  • Views 235 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

INA351: Input Offset of INA 351

atif koçak
Prodigy 20 points
Part Number: INA351

Hi,
In my design I used INA 351 for instrumentation amplification in EEG sensor. I simulated my design and everything was working properly, but on PCB I couldn't get logical output. In the datasheet of the INA351, it is written that 
" Differential input voltages greater than 0.5 V applied continuously can result in a shift to the input offset voltage above the maximum specification of this parameter. The magnitude of this effect increases as the ambient operating temperature rises." 

In my design Vref voltage is also given to the system as an offset between R1 and R2, I couldn't be sure datasheet mention about the difference between two input signal or the offset voltage at inputs.
If you could help me I would be too happy.

 

  • 0
    TI__Genius 11066 points

    Hello,

    The sub-note regarding .5V only applies to the difference between IN+ and IN- at the amplifier, your circuit should not have issues with this problem.

    Can you share the PCB test results so we can compare and understand what the output of the INA is?

    Thank you,

    Jacob