SGLS178I August 2003 – November 2024 LM2902-Q1 , LM2902B-Q1 , LM2902BA-Q1
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
Determine the gain required by the inverting amplifier using Equation 1 and Equation 2:
Once the desired gain is determined, choose a value for RI or RF. Choosing a value in the kilohm range is desirable because the amplifier circuit uses currents in the milliampere range. This allows the part to not draw too much current. This example uses 10kΩ for RI which means 36kΩ is used for RF. This was determined by Equation 3.