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ATS673LSETN-HT Datasheet(PDF) 5 Page - Allegro MicroSystems |
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ATS673LSETN-HT Datasheet(HTML) 5 Page - Allegro MicroSystems |
5 / 20 page 5 ATS673LSE-DS Worcester, Massachusetts 01615-0036 (508) 853-5000 115 Northeast Cutoff, Box 15036 www.allegromicro.com Allegro MicroSystems, Inc. Self-Calibrating TPOS Gear Tooth Sensor Optimized for Automotive Cam Sensing Applications ATS673 and ATS674 SWITCHPOINT CHARACTERISTICS Tooth Speed S Tooth frequency, target generating sinusoidal signal 0 – 8 kHz Bandwidth BW Corresponds to output switching frequency – 3 dB – 40 – kHz Operate BOP ATS673 % of peak-to-peak, referenced to tooth signal, AG < AG(Max) –40– % ATS674 – 30 – % Release BRP ATS673 % of peak-to-peak, referenced to tooth signal, AG < AG(Max) –50– % ATS674 – 40 – % CALIBRATION CHARACTERISTICS4 Initial Calibration CalIC Quantity of rising edges required to complete edge detec- tion calibration – – 3 edges AGC Disable CalAGC Quantity of rising edges required to complete Automatic Gain Control calibration – – 3 edges Calibration Update CalUPD Quantity of rising edges required to update edge detection calibration while running after initial calibration – Contin- uous – edges PERFORMANCE CHARACTERISTICS3 TPOS Air Gap Range5 AGTPOS TPOS functionality guaranteed 0.5 – 2.5 mm Operational Air Gap Range AG TPOS guaranteed, output switching, running mode 0.5 – 2.5 mm Extended Minimum Air Gap6 AGEXTMIN Output switching, running mode; valleys may be detected as teeth in this range – – 0.5 mm Extended Maximum Air Gap7 AGEXTMAX Output switching, running mode; teeth may be detected as valleys in this range 2.5 – 5 mm Relative Timing Accuracy4,8 ErrICREL ATS673 During initial calibration; rising or falling edges, gear speed = 1000 rpm, target eccentricity < 0.1 mm – 3 6 deg ATS674 – 3 6 deg ErrRELR ATS673 Rising edges; after initial calibration, gear speed = 1000 rpm, target eccentricity < 0.1 mm – 0.5 0.8 deg ATS674 – 0.4 0.8 deg ErrRELF ATS673 Falling edges; after initial calibration, gear speed = 1000 rpm, target eccentricity < 0.1 mm – 0.8 1.2 deg ATS674 – 0.6 1.2 deg Phase Delay9 ∆ErrSREL After initial calibration, AG=1.5 mm, TA = 25°C – 1.6 x 10–4 – deg/rpm 1Typical values are taken at VCC = 12 V and TA = 25°C. 2IZSupply(Max) is equivalent to ICCON(Max) + 3 mA. 3Using reference target 8X. 4The term edge refers to a mechanical edge, such as the side of a gear tooth, passing under the device. Rising edge: from valley to approaching tooth. Falling edge: from tooth to approaching valley. 5The TPOS Air Gap Range is the range of installation air gaps within which the TPOS (True Power-On State) function is guaranteed to correctly detect a tooth when powered-on over a tooth and correctly detecting a valley when powered-on over a valley, using reference target 8X or equivalent, as specified in the Target/Gear Parameters for Correct TPOS Operation section in this document. 6The Extended Minimum Air Gap is a range of installation air gaps, smaller than AG(Min), within which the the device will accurately detect target fea- tures but TPOS is NOT guaranteed to be fully accurate, possibly evaluating the initial valley as a tooth. 7The Extended Maximum Air Gap is an extended range of installation air gaps, greater than AG(Max), within which the the device will accurately detect target features but TPOS is not guaranteed to be fully accurate, possibly evaluating the intiial tooth as a valley. 8Relative Timing Accuracy is the change in edge position before the resulting change in device output; for a single device, over the full Operational Air Gap Range, AG, and Operating Ambient Temperature, TA, range. 9Phase Delay is the change in edge position at detection, through the full operational Tooth Speed, S, range for a single device, and at a single ambi- ent temperature, TA, and installation air gap, AG. OPERATING CHARACTERISTICS, continued Valid at TA = –40°C to 150°C, TJ≤TJ(max), over full range of AG, unless otherwise noted Characteristic Symbol Test Conditions Min. Typ.1 Max. Units |
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