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ACS710KLATR-25CB-T Datasheet(PDF) 18 Page - AVAGO TECHNOLOGIES LIMITED |
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ACS710KLATR-25CB-T Datasheet(HTML) 18 Page - AVAGO TECHNOLOGIES LIMITED |
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18 / 22 page  120 kHz Bandwidth, High Voltage Isolation Current Sensor with Integrated Overcurrent Detection ACS710 18 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Chopper Stabilization is an innovative circuit technique that is used to minimize the offset voltage of a Hall element and an asso- ciated on-chip amplifier. Allegro patented a Chopper Stabiliza- tion technique that nearly eliminates Hall IC output drift induced by temperature or package stress effects. This offset reduction technique is based on a signal modulation-demodulation process. Modulation is used to separate the undesired dc offset signal from the magnetically induced signal in the frequency domain. Then, using a low-pass filter, the modulated DC offset is suppressed while the magnetically induced signal passes through the filter. As a result of this chopper stabilization approach, the output voltage from the Hall IC is desensitized to the effects of tempera- ture and mechanical stress. This technique produces devices that have an extremely stable Electrical Offset Voltage, are immune to thermal stress, and have precise recoverability after temperature cycling. This technique is made possible through the use of a BiCMOS process that allows the use of low-offset and low-noise amplifiers in combination with high-density logic integration and sample and hold circuits. Amp Regulator Clock/Logic Hall Element Low-Pass Filter Concept of Chopper Stabilization Technique Chopper Stabilization Technique |
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