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A1423 Datasheet(PDF) 6 Page - Allegro MicroSystems |
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A1423 Datasheet(HTML) 6 Page - Allegro MicroSystems |
6 / 16 page 6 A1421-DS Worcester, Massachusetts 01615-0036 (508) 853-5000 115 Northeast Cutoff, Box 15036 www.allegromicro.com Allegro MicroSystems, Inc. High Precision Hall Effect AC-Coupled Differential Sensor with Integrated Filter Capacitor A1421, A1422, A1423 THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Symbol Test Conditions* Value Units Package Thermal Resistance RθJA Minimum-K PCB (single-sided with copper limited to solder pads) 177 ºC/W *In still air. Additional thermal information available on Allegro Web site. 20 40 60 80 100 120 140 160 180 TJ(max) = 165ºC; ICC =ICC(max) Power Derating Curve 8 10 12 14 0 2 4 6 16 18 20 22 24 26 28 30 (RθJA = 177 ºC/W) Minimum-K PCB VCC(min) VCC(max) 20 40 60 80 100 120 140 160 180 Temperature (°C) TJ(max) = 165ºC; VCC =VCC(max);ICC =ICC(max) Maximum Power Dissipation, PD(max) (R θJA = 177 ºC/W) Minimum-K PCB 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 The following provide additional information about some of the parameters cited. For additional information, visit the Allegro Web site at www.allegromicro.com. Applied Magnetic Field, Bdiff – The differential magnetic flux density, which is calculated as the arithmetic difference of the flux densities observed by each of the two Hall elements. fBdiff is the input signal frequency. Output Off Switchpoint (Operate Point), BOP – The value of increasing differential magnetic flux density at which the device output switches from low to high (A1421) or high to low (A1422 and A1423). Output On Switchpoint (Release Point), BRP – The value of decreasing differential magnetic flux density at which the device output switches from high to low (A1421) or from low to high (A1422 and A1423). Power-On Time, tPO – The time needed by the device, after power is applied, to initialize all circuitry necessary for proper operation. Settling Time, tSettling – The time required by the device, after tPO, and after a valid magnetic signal has been applied, to provide proper output transitions. Settling time is a function of magnetic offset, offset polarity, signal phase, signal frequency, and signal amplitude. Supply Current (on), ICC(on) – The current draw of the device with the output transitor is turned on. Supply Current (off), ICC(off) – The current draw of the device with the output transitor is turned off. Response Time, tResponse – The total time required for generating zero-crossing output transitions after initialization (the sum of Power-on Time and Settling Time). Definitions of Terms |
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