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HAL730SF-E Datasheet(PDF) 4 Page - Micronas |
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HAL730SF-E Datasheet(HTML) 4 Page - Micronas |
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4 / 19 page  HAL 710, HAL 730 DATA SHEET 4 Oct. 13, 2009; DSH000031_002EN Micronas Hall-Effect Sensors with Direction Detection Release Note: Revision bars indicate significant changes to the previous edition. 1. Introduction The HAL 710 and the HAL 730 are monolithic inte- grated Hall-effect sensors manufactured in CMOS technology with two independent Hall plates S1 and S2 spaced 2.35 mm apart. The devices have two open-drain outputs: – The Count Output operates like a single latched Hall switch according to the magnetic field present at Hall plate S1 (see Fig. 4–1). – The Direction Output indicates the direction of a lin- ear or rotating movement of magnetic objects. In combination with an active target providing a sequence of alternating magnetic north and south poles, the sensors generate the signals required to control position, speed, and direction of the target movement. The internal circuitry evaluates the direction of the movement and updates the Direction Output at every edge of the Count Signal (rising and falling). The state of the Direction Output only changes at a rising or fall- ing edge of the Count Output. The design ensures a setup time for the Direction Out- put with respect to the corresponding Count Signal edge of 1/2 clock periods (1 μs minimum). The devices include temperature compensation and active offset compensation. These features provide excellent stability and matching of the switching points in the presence of mechanical stress over the whole temperature and supply voltage range. This is required by systems determining the direction from the compar- ison of two signals. The sensors are designed for industrial and automo- tive applications and operate with supply voltages from 3.8 V to 24 V in the ambient temperature range from −40 °C up to 125 °C. The HAL 710 and the HAL 730 are available in the SMD-package SOT89B-2. 1.1. Features – generation of Count Signals and Direction Signals – delay of the Count Signals with respect to the Direction Signal of 1 μs minimum – switching type: latching – switching offset compensation at typically 150 kHz – operation from 3.8 V to 24 V supply voltage – overvoltage protection at all pins – reverse-voltage protection at VDD-pin – robustness of magnetic characteristics against mechanical stress – short-circuit protected open-drain outputs by thermal shut down – constant switching points over a wide supply voltage range – EMC corresponding to ISO 7637 1.2. Family Overview The types differ according to the behavior of the Direc- tion Output. Type Direction Output: Definition of Output States HAL 710 Output high, when edge of comparator 1 precedes edge of comparator 2 HAL 730 Output high, when edge of comparator 2 precedes edge of comparator 1 |
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