NVE ultraminiature digital switches for medical devices have spintronic GMR sensor elements with integrated comparators. Some versions have duty-cycling power management for power consumption less than one microwatt. A number of part types and versions are available:

Part Number	Typ. Operate Point (Oe)*	Power Management	Quiescent Supply Current (µA)	Minimum Supply (V)	Packages
AFLxxx	7, 10, 20, or 28	Continuous sampling	55 µA at 0.9 V	0.9, 1.8, 2.7, or 4.5	2.5 mm x 2.5 mm TDFN; MSOP8; or 1.45 mm x 1.5 mm die
BD020	13	Integrated duty cycling	0.06 µA at 2.4 V	2.4	1.1 mm x 1.1 mm ULLGA; 0.6 mm x 0.6 mm die
BD927	15	Continuous sampling	35 µA at 0.9 V	0.9	1.1 mm x 1.1 mm ULLGA; 0.6 mm x 0.6 mm die
BD027	15	Integrated duty cycling	0.05 µA at 0.9 V	0.9	1.1 mm x 1.1 mm ULLGA; 0.6 mm x 0.6 mm die

* 1 Oersted (Oe) = 0.1 mT = 1 Gauss in air