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A1642 Datasheet(PDF) 4 Page - Allegro MicroSystems |
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A1642 Datasheet(HTML) 4 Page - Allegro MicroSystems |
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4 / 14 page  Two-Wire True Zero-Speed Miniature Differential Peak-Detecting Sensor IC with Continuous Calibration A1642 4 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com OPERATING CHARACTERISTICS (continued) TA and VCC within specification, unless otherwise noted Characteristic Symbol Test Conditions Min. Typ.1 Max. Units SWITCHPOINT CHARACTERISTICS Operating Speed fOP 0 – 8,000 Hz Analog Signal Bandwidth BW Equivalent to f – 3 dB 20 40 – kHz Operate Point BOP Transitioning from ICC(High) to ICC(Low); positive peak referenced; AG < AGMAX – 120 – mV Release Point BRP Transitioning from ICC(Low) to ICC(High); negative peak referenced; AG < AGMAX – 120 – mV CALIBRATION Initial Calibration CI Quantity of rising output (current) edges required for accurate edge detection – – 3 Edge DAC CHARACTERISTICS Allowable User-Induced Differential Offset Operating within specification – – ±90 G FUNCTIONAL CHARACTERISTICS6 Operating Signal Range7 Sig Operating within specification 30 – 1000 G Minimum Operating Signal SigOP(min) Output switching (no missed edges); ∆DC not guaranteed 20 – – G 1Typical values are at TA = 25°C and VCC = 12 V. Performance may vary for individual units, within the specified maximum and minimum limits. 2Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section. 3Please refer to Device Operation section. 4Power-On Time includes the time required to complete the internal automatic offset adjust. The DAC is then ready for peak acquisition. 5dI is the difference between 10% of ICC(Low) and 90% of ICC(High), and dt is the time period between those two points. Note: dI/dt is dependent upon the value of the bypass capacitor, if one is used. 6Functional characteristics valid only if magnetic offset is within the specified range for Allowable User Induced Differential Offset. 7In order to remain in specification, the magnetic gradient must induce an operating signal greater than the minimum value specified. This includes the effect of target wobble. |
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