UH4921

DESCRIPTION 

The differential Hall Effect sensor UTC UH4921 provides a 

superior stability and a high sensitivity over temperature and 

symmetrical thresholds in order to achieve a stable duty cycle. The 

integrated circuit provides a digital signal output with frequency 

proportional to the speed of rotation. Unlike other rotational sensors 

differential Hall ICs are not influenced by radial vibration within the 

effective airgap of the sensor and require no external signal 

processing. 

UTC UH4921 is particularly suitable for rotational speed 

detection and timing applications of ferromagnetic toothed wheels 

such as anti-lock braking systems, transmissions, crankshafts, etc. 

FEATURES

* Digital output signal 

* Low cut-off frequency 

* High sensitivity 

* Symmetrical thresholds 

* Reduced power consumption 

* AC coupled 

* Output protection against electrical disturbances 

* Large temperature range 

* Large airgap 

* Protection against overvoltage 

* Protection against reversed polarity 

* Two-wire and three-wire configuration possible 

* Advanced performance 

* South and north pole pre-induction possible 

* High piezo resistivity 

规格书UH4921