Hello everyone,
We have a design in which we average the outputs of two current transducers. Each transducer's output is buffered (unity gain buffer) and then connected to the thirds opamp's +ve input via ~20k resistors. This opamp's negative input pin is also tied to the output. Thus the output out of the board is the average of the two signals. At the moment we are using this part ("No equivalent TI cross reference part available"). It is unclear why this part was selected, hence my question.
What should be the selection criteria for this application? Is there a better choice? The transducers' bandwidth is 30 kHz (-3 dB). The signal itself is a tenth of that (~3 kHz). The output of this summing/averaging amplifier does not drive the ADC input directly -- there is another buffer stage on the processor card.
Thank you,
Saurabh
