I made a bio-amplifier circuit using the LM386N-1 as my audio amplifier. I attached the circuit I made below.
The first version of the board I made of this circuit used an 8-DIP package. I debugged everything, and decided to make an SMT version. This is where it got strange. The same signal going into both the DIP and SMT (SOIC) versions of the circuit produce dramatically different results. The SOIC chip is much, much quieter through the speaker then the DIP chip. ~2-5x quieter.
I checked the boards and everything appears to be the same up to the LM386 on both boards. The part numbers from DigiKey were LM386N-1-ND and LM386M-1-ND respectively. According to the datasheet, they should be identical.
Has anyone have an idea why this could be? I heard that some chips that have the same datasheets can behave differently from different manufacturers. Perhaps this could be causing the difference?
The first version of the board I made of this circuit used an 8-DIP package. I debugged everything, and decided to make an SMT version. This is where it got strange. The same signal going into both the DIP and SMT (SOIC) versions of the circuit produce dramatically different results. The SOIC chip is much, much quieter through the speaker then the DIP chip. ~2-5x quieter.
I checked the boards and everything appears to be the same up to the LM386 on both boards. The part numbers from DigiKey were LM386N-1-ND and LM386M-1-ND respectively. According to the datasheet, they should be identical.
Has anyone have an idea why this could be? I heard that some chips that have the same datasheets can behave differently from different manufacturers. Perhaps this could be causing the difference?
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