Digital Hall-Effect Sensors Detect AC Or DC Current

Either dc or ac current is sensed by a line of Hall-effect digital linear current sensors. When the sensors sense zero current, their output voltage is equal to their supply voltage. Output voltage remains equal to V_CC as long as the sensed current level is less than the operate current level (I_OP). When the sensed current level is higher than I_OP, the output voltage falls to about 0.2V and remains there until the sensed current level is decreased to below the release current level (I_REL). When that occurs, the output voltage again rises to equal V_CC.There are 12 models in the VHEDCS sensor line, each of which is said to offer excellent temperature stability, high accuracy and and operating temperature range of -40°C to 125°C. Applications include automotive and transportation diagnostics, power supplies, motor controls, overload protection circuits, and energy management systems.