d123
Advanced Member level 5
Hi,
I'm not sure why the first/series resistor is so low if the load is only ~1mA, 820 Ohms results in about 6mA at 5V, maybe I've misunderstood/am missing something. Parts like to be kept cool, so the less quiescent current, the better. Depends. Will the sensor inputs interact in any negative way? TL431 is robust as a real reference, I'd guess TLV is too. I use 1mA (+ load current + a little extra in case) with TL431 when only using it as a voltage reference. Perhaps a quad op amp with a one as a voltage follower buffer, fanning out into three other voltage follower buffers could be helpful and less parts.
I'm not sure why the first/series resistor is so low if the load is only ~1mA, 820 Ohms results in about 6mA at 5V, maybe I've misunderstood/am missing something. Parts like to be kept cool, so the less quiescent current, the better. Depends. Will the sensor inputs interact in any negative way? TL431 is robust as a real reference, I'd guess TLV is too. I use 1mA (+ load current + a little extra in case) with TL431 when only using it as a voltage reference. Perhaps a quad op amp with a one as a voltage follower buffer, fanning out into three other voltage follower buffers could be helpful and less parts.