AD8232 high-pass filter cutoff frequency for +/-300mV offset rejection

My customer investigates Heart Rate Monitor design using AD8232 and he likes to use Figure62 circuit in the datasheet.

would you inform us if he meets +/-300mV offset rejection using this circuit and what are required R,C values(cut off frequency) to meet +/-300mV offset rejection.

  • 0
    •  Analog Employees 
    on Nov 3, 2020 12:26 AM 26 days ago

    Hi, 

    Yes, offset rejection would be available on Figure 62. If you were to use the components that are given in the figure (R=10Mohms, C=0.22uF), the cutoff frequency would be at about 7Hz, which should cover the DC offset. You can read through the "Eliminating Electrode Offsets" section on page 23 of the datasheet for more information if you want to find out how to calculate the cutoff frequency. 

    Thanks, 

    Kris