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ATS673LSETN-HT-T Datasheet(PDF) 2 Page - Allegro MicroSystems |
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ATS673LSETN-HT-T Datasheet(HTML) 2 Page - Allegro MicroSystems |
2 / 19 page Self-Calibrating TPOS Gear Tooth Sensor Optimized for Automotive Cam Sensing Applications ATS673 and ATS674 2 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com performance independent of air gap and also to dynamically adapt device performance to the typical operating conditions found in automotive applications, particularly cam sensing applications (reduced vibration sensitivity). High-resolution (9-bit) peak detecting DACs are used to set the adaptive switching thresholds of the devices, ensuring high accuracy even in the presence of gear eccentricity. Hysteresis in the thresholds reduces the negative effects of anomalies in the magnetic signal (such as magnetic overshoot) associated with the targets used in many automotive applications. The ATS673 and 674 also include a low bandwidth filter that increases the noise immunity and the signal to noise ratio of the sensor. Two options are available for output polarity, low over tooth (LT) and high over tooth (HT). For applications requiring absolute accuracy use the ATS674. The ATS673 should be used for targets with high wobble. ▪ AGC and reference adjust circuit ▪ Undervoltage lockout Features and Benefits (continued) Description (continued) Absolute Maximum Ratings Characteristic Symbol Notes Rating Units Supply Voltage VCC 28 V Reverse-Supply Voltage VRCC –18 V Continuous Output Current IOUT 20 mA Reverse Output Current IROUT 50 mA Operating Ambient Temperature TA Range L –40 to 150 ºC Maximum Junction Temperature TJ(max) 165 ºC Storage Temperature Tstg –65 to 170 ºC Terminal List Name Description Number VCC Connects power supply to chip 1 VOUT Device output 2 TEST For Allegro use, float or tie to GND 3 GND Ground terminal 4 24 3 1 Pin-out Diagram Selection Guide Part Number Pb-free1 VOUT (Over Tooth) Application Packing2 ATS673LSETN-LT-T Yes Low High target wobble 13-in. reel, 450 pieces/reel ATS673LSETN-HT-T Yes High ATS674LSETN-LT-T Yes Low High absolute edge detection accuracy ATS674LSETN-HT-T Yes High 1Pb-based variants are being phased out of the product line. Certain variants cited in this footnote are in production but have been determined to be 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: ATS673LSETN-LT, ATS673LSETN-HT, ATS674LSETN-LT, and ATS674LSETN-HT. 2Contact Allegro for additional packing options. |
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