Lm4040 and lm4041 sot 23 precision shunt voltage references texas instruments lm4040c25idbzt precision voltage reference shunt topology 25v output voltage 05 initial accuracy 15ma shunt current 100ppmc temperature coefficient sot 23 case the lm4040 series of shunt voltage references are versatile easy to use references that cater to a vast array of applications low dynamic impedance low noise and low temperature coefficient typical applications includes data acquisition system