ATS675LSE Self-Calibrating TPOS Speed Sensor IC Optimized for Automotive Cam Sensing Applications Features and Benefits Description Optimized for automotive camshaft sensing The ATS675 is a next generation member of the Allegro True True target state recognition at device power-on (TPOS) Power-On State (TPOS) sensor IC family, offering improved and at zero target speed accuracy compared to prior generations, and performing at Chopper stabilization reduces offset drift absolutely zero target speed. An output polarity option allows Digital output polarity option: follow or invert target profile customization for specific applications. Rapid calibration and transition to Running mode The device incorporates a single Hall-element IC with an Automatic Gain Control (AGC) during calibration optimized custom magnetic circuit that switches in response to eliminates effects of air gap variations magnetic signals. The resulting output of the device is a digital Tight timing accuracy over full operating representation of a ferromagnetic target profile. temperature range Operation at supply voltages as low as 3.3 V The IC contains a sophisticated digital circuit designed to Undervoltage lockout (UVLO) eliminate the detrimental effects of magnetic and system offsets. Signal processing is used to provide target state recognition at zero rotational speed, consistent switchpoints regardless Package: 4-pin SIP (suffix SE) of air gap, and dynamically adapt device performance to the typical operating conditions found in automotive environments, particularly cam sensing applications. High-resolution peak-detecting DACs are used to set the adaptive switching thresholds of the device. The ATS675 also includes a filter that increases the noise immunity and the signal-to-noise ratio of the IC. The device is provided in a 4-pin SIP package (SE) that is lead Not to scale (Pb) free with 100% matte tin leadframe plating. Typical Application V S V PU C BYPASS R 0.1 F 1 PU VCC ATS675 3 2 Output TEST OUT A GND C L 4 A Recommended Figure 1. Operational circuit for the ATS675 ATS675LSE-DS, Rev. 2Self-Calibrating TPOS Speed Sensor IC ATS675LSE Optimized for Automotive Cam Sensing Applications Selection Guide Part Number Output Protocol Packing* ATS675LSETN-LT-T Output low opposite target tooth 13-in. reel, 450 pieces per reel ATS675LSETN-HT-T Output high opposite target tooth *Contact Allegro for additional packing options Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit Supply Voltage V Refer to Power Derating curve 28 V CC Reverse Supply Voltage V 18 V RCC Reverse Output Voltage V 0.5 V ROUT Reverse Supply Current I 50 mA RCC Internal current limiting is intended to protect Output Current I the device from output short circuits, but is not 30 mA OUT(sink) intended for continuous operation. Reverse Output Current I 50 mA ROUT Operating Ambient Temperature T Range L 40 to 150 C A Maximum Junction Temperature T (max) 165 C J Storage Temperature T 65 to 170 C stg Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com