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ATS651LSH Datasheet(PDF) 3 Page - Allegro MicroSystems |
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ATS651LSH Datasheet(HTML) 3 Page - Allegro MicroSystems |
3 / 12 page Two-Wire Self-Calibrating Differential Speed and Direction Sensor with Vibration Immunity ATS651LSH 3 651LSH-DS, Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 115 Northeast Cutoff, Box 15036 www.allegromicro.com Allegro MicroSystems, Inc. ELECTRICAL CHARACTERISTICS Valid for –40°C ≤ TA ≤ 150°C, TJ ≤ 165°C, unless otherwise noted Characteristics Symbol Test Conditions Min. Typ. Max. Units Supply Voltage VCC Running, TJ ≤ 165°C 4.3 – 24 V Undervoltage Lockout VCC(UV) VCC = 5 → 0 V – – 4.3 V Reverse Supply Current IRCC VCC = –18 V – – –10 mA Supply Zener Clamp Voltage VZ ICC(Low)max + 3 mA 28 – 40 V Supply Zener Resistance RZ –20– Ω Output Current Slew Rate SRI I(High) → I(Low), I(Low) → I(High) RSENSE = 100 Ω, CSENSE = 10 pF, 10 to 90% points 2 16 – mA/ μs Power-On State POS ION state – ICC(Low) –mA Power-On Time1 tPO Gear speed < 100 rpm – – 1 ms Supply Current ICC(Low) Low-current state 4 7 9 mA ICC(High) High-current state 12 14.5 17 mA Supply Current Difference ΔICC ICC(High) - ICC(Low); difference between high-current state level and low-current state level 5.3 – – mA CALIBRATION Direction Information2 NDir First output transition – – 8 Edge Speed Information2 NSpd First output transition – – 8 Edge Direction Change Detection3 NCD Running mode direction change – – 1 Edge Signal Variation4 (At calibration) ECAL Over four edges – – ±0.3 mm DAC CHARACTERISTICS Dynamic Offset Cancellation5 As shipped – ±60 – G 1Power-On Time is the time required to complete the internal automatic offset adjust; the DACs are then ready for peak acquisition. 2Edge count is based on mechanical edges. First output edge is available on or before NDir or NSpd edges. 3Edge count is based on mechanical edges. On the NCD edge, direction and speed information is valid. 4If the peak-to-peak amplitude of the signal varies more than the specified amount during the direction verification process, then additional edges may be required for calibration. 5The device will compensate for magnetic and installation offsets up to ±60 gauss. Offsets greater than ±60 gauss may cause inaccuracies in the output. OPERATING CHARACTERISTICS Using Reference Target 60-0 and valid over operating temperature range Characteristics Symbol Test Conditions Min. Typ. Max. Units Operational Air Gap Range* AGOP Within specification 0.5 – 2.8 mm Operating Signal Range Sig Within specification 30 – 1200 G *Operational Air Gap Range is dependent on the available differential magnetic field. The available field is dependent on target geometry and material, and should be independently characterized. The field available from the Reference Target is given in the Reference Target Parameters section of this datasheet. Device Characteristics Tables Continued on the next page... |
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