A1230LLTR-T;中文规格书,Datasheet资料.pdf

A1230LLTR-T;中文规格书,Datasheet资料.pdf

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A1230LLTR-T;中文规格书,Datasheet资料

Using regulated supply Description The A1230 is a dual-channel, bipolar switch with two Hall- effect sensing elements, each providing a separate digital output for speed and direction signal processing capability. The Hall elements are photolithographically aligned to better than 1 μm. Maintaining accurate mechanical location between the two active Hall elements eliminates the major manufacturing hurdle encountered in fine-pitch detection applications. The A1230 is a highly sensitive, temperature stable magnetic sensing device ideal for use in ring magnet based, speed and direction systems located in harsh automotive and industrial environments. The A1230 monolithic integrated circuit (IC) contains two independent Hall-effect bipolar switches located 1 mm apart. The digital outputs are out of phase so that the outputs are in quadrature when interfaced with the proper ring magnet design. This allows easy processing of speed and direction signals. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. The Allegro? patented, high-frequency chopper-stabilization technique cancels offsets in each channel providing stable operation over the full specified temperature and voltage ranges. Additionally, the high-frequency chopping circuits allow an increased analog signal-to-noise ratio at the input of the digital A1230DS, Rev. 1 Features and Benefits ? Two matched Hall effect switches on a single substrate ? 1 mm Hall element spacing ? Superior temperature stability and industry-leading jitter performance through use of advanced chopper- stabilization topology ? Integrated regulator provides 3.3 V operation ? Integrated ESD protection from outputs and VCC to ground ? High sensitivity switchpoints ? Robust structure for EMC protection ? Solid-state reliability ? Reverse battery protection on supply and both output pins Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch Continued on the nex

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