The SC4688 is a BiCMOS programmable linear Hall Effect sensor IC. The linear output voltage is proportional to the magnetic flux density. The output voltage is proportional to the supply voltage. All the parameters of the SC4688 transfer characteristic are fully programmable. The VQ, the sensitivity, the slope polarity, the output clamping levels, and the thermal sensitivity drift are all programmable in end-user applications. The part offers open-circuit, as well as over-voltage and under-voltage detection and individual programming of different sensors which are in parallel to the same supply voltage.
The SC4688 is programmable by modulating the supply voltage. No additional programming pin is needed. The easy programmability allows a 2-point calibration by adjusting the output voltage directly to the input signal. In addition, the temperature compensation of the Hall IC can be fit to all common magnetic materials by programming first and second order temperature coefficients of the Hall sensor sensitivity. This enables operation over the full temperature range with high accuracy.
The sensor is designed for hostile industrial and automotive applications and operates with typically 5 V supply voltage in the ambient temperature range from -40 up to 150 ℃. The SC4688 is available in the very small leaded package SIP3-SA and SOP8-DC.