ats643 Allegro MicroSystems, Inc., ats643 Datasheet
ats643
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ats643 Summary of contents
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... NDAC ATS643-DS, Rev. 2 Self-Calibrating, Zero-Speed Differential Description The ATS643 is an optimized combination of integrated circuit and magnet that provides a manufacturer-friendly solution for true zero-speed digital gear-tooth sensing in two-wire applications. The device consists of a single-shot molded plastic package that includes a samarium cobalt magnet, a pole piece, and a Hall-effect IC that has been optimized to the magnetic circuit and the automotive environment ...
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... NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status change: May 1, 2006. These variants include: ATS643LSHTN-I1 and ATS643LSHTN-I2. 2 Contact Allegro for additional packing options. ...
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... Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update and Test Conditions Operating; T < 165 ° → for ATS643-I1, and 19.8 mA for CC Z ATS643-I2 25°C A ATS643-I1 ATS643-I2 ATS643-I1 ATS643-I2 / Ratio of high current to low current t < dI/dt < 5 μs on Target gear speed < ...
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... ATS643LSH OPERATING CHARACTERISTICS (continued) using reference target 60-0, T Characteristic Symbol SWITCHPOINT CHARACTERISTICS Rotation Speed Bandwidth Operate Point Release Point 3 CALIBRATION Initial Calibration Period AGC Calibration Disable Start Mode Hysteresis PO DAC CHARACTERISTICS Dynamic Offset Cancellation Tracking Data Resolution FUNCTIONAL CHARACTERISTICS Air Gap Range ...
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... ATS643LSH REFERENCE TARGET, 60-0 (60 Tooth Target) Characteristics Symbol Outside Diameter D o Face Width F Circular Tooth Length t Circular Valley Length t v Tooth Whole Depth h t Material Reference Gear Magnetic Gradient Amplitude with Reference to Air Gap 1800 1600 1400 1200 1000 800 600 400 ...
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... ATS643LSH Duty Cycle at 1000 – (° Continued on the next page. Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update Characteristic Data Data taken from 3 lots, 30 pieces/lot; I1 trim Reference Target 60-0 RPM 60 AG (mm) 3.0 2.75 2.5 55 2.25 2.0 1.5 1.0 0 100 150 ...
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... ATS643LSH I CC (Low – (° CC(High – (°C) A Output current in relation to sensed mag- netic flux density. Transition through B must precede by transition through B Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update Characteristic Data (continued) Data taken from 3 lots, 30 pieces/lot ...
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... ATS643LSH THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update Symbol Test Conditions Minimum-K PCB (single-sided with copper limited to solder pads) R θJA Low-K PCB (single-sided with copper limited to solder 2 pads and 3 ...
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... The waveform diagram in figure 3 presents the automatic translation of the mechanical profile, through the magnetic profile that it induces, to the digital output signal of the ATS643. No additional optimization is needed and minimal processing circuitry is required. This ease of use reduces design time and ...
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... Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update release point shown in panel C of figure 4, threshold levels for the ATS643 switchpoints are established dynamically as function of the peak input signal levels. The ATS643 incorporates an algorithm that continuously monitors the system and updates the switch- ing thresholds accordingly ...
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... ATS643LSH Power-On State Operation. The ATS643 is guaranteed to power-on in the high current state, I CC(High) Initial Edge Detection. The device self-calibrates using the initial teeth sensed, and then enters Running mode. This results in reduced accuracy for a brief period (less than four teeth), Target ...
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... Output Signal, I Figure 6. Operation of Start Mode Hysteresis Position 1. At power-on, the ATS643 begins sampling V Position 2. At the point where the Start Mode Hysteresis is exceeded, the device begins to establish switching thresholds (B tinuous Update algorithm. After this point, Start Mode Hysteresis is no longer a consideration. Note that a valid V Hysteresis can be generated either by a legitimate target feature or by excessive vibration ...
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... Continuous operation also allows it to compensate for offsets induced by temperature variations over time. Assembly Description. The ATS643 is integrally molded into a plastic body that has been optimized for size, ease of assembly, and manufacturability. High operating temperature materials are used in all aspects of construction ...
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... ATS643LSH The device must be operated below the maximum junction temperature of the device Under certain combinations of J(max) peak conditions, reliable operation may require derating sup- plied power or improving the heat dissipation properties of the application. This section presents a procedure for correlating factors affecting operating T ...
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... ATS643LSH 5.8 5.0 20.95 .825 13.05 .514 Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update Package SH, 4-pin SIP 8.0 .315 .228 4.0 .157 1.7 .067 .244 0.6 .024 Dimensions in millimeters. Untoleranced dimensions are nominal. U.S. Customary dimensions (in.) in brackets, for reference only A Dambar removal protrusion (16X) B Metallic protrusion, electrically connected to pin 4 and substrate (both sides) ...
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... ATS643LSH Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor with Continuous Update The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time ...