Lm334 adjustable current source national semiconductor lm334z adjustable current source shunt topology 3 initial accuracy 1v to 40v series vref input voltage 1ua series vref supply current 10ma shunt current 33ppm c temperature coefficient to 92 case lm334 are 3 terminal adjustable current sources featuring 10000 1 range in operating current excellent current regulation a wide dynamic voltage range of 1v to 40v applications for the current sources include bias networks surge pro