ATS643LSH-I1TN Allegro Microsystems Inc, ATS643LSH-I1TN Datasheet
ATS643LSH-I1TN
Specifications of ATS643LSH-I1TN
Related parts for ATS643LSH-I1TN
ATS643LSH-I1TN Summary of contents
Page 1
... The device also uses a continuous update algorithm to fine- tune the switchpoints while in running mode, maintaining Continued on the next page… Functional Block Diagram Offset Adjust AGC ThresholdP ThresholdN ATS643LSH VCC (Pin 1) Internal Regulator Threshold Logic GND (Pin 4) ...
Page 2
... Wide operating voltage range ▪ Defined power-on state Part Number ATS643LSHTN-I1-T Tape and Reel 13-in. 800 pcs./reel ATS643LSHTN-I2-T Tape and Reel 13-in. 800 pcs./reel * Contact Allegro for additional packing options. Some restrictions may apply to certain types of sales. Contact Allegro for details. ...
Page 3
... ATS643LSH OPERATING CHARACTERISTICS using reference target 60-0, T Characteristic Symbol ELECTRICAL CHARACTERISTICS Supply Voltage V CC Undervoltage Lockout V CC(UV) Supply Zener Clamp Voltage V I CC(Low) Supply Current I CC(High) I Supply Current Ratio CC(High) I CC(Low) POWER-ON CHARACTERISTICS Power-On State I CC(PO) Power-On Time OUTPUT STAGE Output Slew Rate ...
Page 4
... 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 ...
Page 5
... 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 ...
Page 6
... ATS643LSH Duty Cycle at 1000 – (° Continued on the next page. Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor IC 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 ...
Page 7
... 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 IC with Continuous Update Characteristic Data (continued) Data taken from 3 lots, 30 pieces/lot; I1 trim 26.5 20 ...
Page 8
... ATS643LSH THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance Self-Calibrating, Zero-Speed Differential Gear Tooth Sensor IC 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 ...
Page 9
... ATS643LSH Hall Technology. The ATS643 contains a single-chip differ- ential Hall effect sensor IC, a samarium cobalt pellet, and a flat ferrous pole piece (concentrator). As shown in figure 1, the Hall IC supports two Hall elements, which sense the magnetic profile of the ferrous gear target simultaneously, but at different points (spaced ...
Page 10
... ATS643LSH induced by the target and sensed by the Hall elements. When V transitions through a switchpoint from the appropriate PROC higher or lower level, it triggers IC switch turn-on and turn-off. As shown in figure 3, when the switch is in the off state rises through a certain limit, referred to as the operate ...
Page 11
... 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 ...
Page 12
... ATS643LSH Start Mode Hysteresis. This feature helps to ensure optimal self-calibration by rejecting electrical noise and low-amplitude target vibration during initialization. This prevents AGC from calibrating the IC on such spurious signals. Calibration can be performed using the actual target features. Target, Gear Package Position Relative to Target ...
Page 13
... ATS643LSH Undervoltage Lockout. When the supply voltage falls below the minimum operating voltage, V and remains high regardless of the state of the magnetic gradi- ent from the target. This lockout feature prevents false signals, caused by undervoltage conditions, from propagating to the output of the IC. ...
Page 14
... 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 ...
Page 15
... ATS643LSH 1.10 F 8.00±0.05 5.80±0.05 E1 1.70±0.10 4.00±0.10 5.00±0. 24.65±0.10 13.10±0.10 A 5.50±0.10 Copyright ©2004-2009, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of the following U.S. patents: 5,264,783; 5,389,889; 5,442,283; 5,517,112; 5,581,179; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; 6,091,239; 6,100,680; 6,232,768; 6,242,908; 6,265,865; ...