Jun 26, 2015
Tiny, low power, up to 26V common mode, 1% gain error, preset gain!
I use these or the older INA199 series almost everywhere. They’re pin compatible (at least the SC70 package is), so if you have an older INA199 design you can drop the same gain INA21x series in with no real PCB artwork changes. These things rock, they take all the annoyance out of building a current shunt measurement circuit. Pick an amplification factor and shunt resistor, drop one of these and a decoupling capacitor on the board, feed it into your ADC and you’re done. Bandwidth is nothing to write home about, but that’s usually not very important when measuring high currents.