JAJSMX0 September 2020 INA848
PRODUCTION DATA
In environments where a known, narrow-frequency band must be attenuated, a series LC filter network can be added between the filter pins, as shown in Figure 9-2. The connection adds to the internal resistor network, and results in a RLC filter network that is also commonly known as bandstop filter.
Use Equation 3 to calculate the middle frequency of the filter:
The resistor is given by the internal resistor of 6 kΩ; therefore, the damping factor of the filter can further be affected of the series resistance of the inductor LFL. For stable operation of the filter, choose an inductor in the range of 100 µH.