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A3425ELTR-T Datasheet(PDF) 9 Page - Allegro MicroSystems |
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A3425ELTR-T Datasheet(HTML) 9 Page - Allegro MicroSystems |
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9 / 21 page  Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch A3425 9 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Regulated supply 1 A3425 2 3 4 V Supply 0.1 uF VOUTPUTB VOUTPUTA OUTPUTA OUTPUTB GND VCC 0.1 uF 100 Ω 1 A3425 2 3 4 V Supply VOUTPUTB VOUTPUTA OUTPUTA OUTPUTB GND VCC This device requires minimal protection circuitry during operation with a low-voltage regulated line. The on-chip voltage regulator provides immunity to power supply variations between 3.3 and 18 V. Because the device has open-drain outputs, pull-up resistors must be included. If protection against coupled and injected noise is required, then a simple low-pass filter on the supply (RC) and a filtering capacitor on each of the outputs may also be needed, as shown in the unregulated supply diagram. For applications in which the device receives its power from unregulated sources, such as a car battery, full protection is generally required to protect the device against supply-side transients. Specifications for such transients vary for each application, so the design of the protection circuit should be optimized for each application. For example, the circuit shown in the unregulated supply diagram includes a Zener diode that offers high voltage load-dump protection and noise filtering by means of a series resistor and capacitor. In addition, it includes a series diode that protects against high-volt- age reverse battery conditions. Unregulated supply Typical Applications Circuits |
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