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A1365LKTTN-2-T Datasheet(PDF) 13 Page - Allegro MicroSystems |
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A1365LKTTN-2-T Datasheet(HTML) 13 Page - Allegro MicroSystems |
13 / 32 page Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC With High-Bandwidth (120 kHz) Analog Output and Integrated Fault Comparator A1365 13 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com CHARACTERISTIC DEFINITIONS Power-On Time (tPO) When the supply is ramped to its operating voltage, the device requires a finite time to power its internal components before responding to an input magnetic field. Power-On Time (tPO ) is defined as: the time it takes for the output voltage to settle within ±10% of its steady-state value under an applied magnetic field, after the power supply has reached its minimum specified operating voltage (VCC(min)) as shown in Figure 1. Temperature Compensation Power-On Time (tTC) After Power-On Time (tPO) elapses, tTC is also required before a valid temperature compensated output. Propagation Delay (tpd) The time interval between a) when the applied magnetic field reaches 20% of its final value, and b) when the output reaches 20% of its final value (see Figure 2). Rise Time (tr) The time interval between a) when the sensor IC reaches 10% of its final value, and b) when it reaches 90% of its final value (see Figure 2). Both tr and tRESPONSE are detrimentally affected by eddy current losses observed in the conductive IC ground plane. Response Time (tRESPONSE) The time interval between a) when the applied magnetic field reaches 80% of its final value, and b) when the sensor reaches 80% of its output corresponding to the applied magnetic field (see Figure 3). Delay to Clamp (tCLP ) A large magnetic input step may cause the clamp to overshoot its steady-state value. The Delay to Clamp (tCLP) is defined as: the time it takes for the output voltage to settle within steady-state clamp voltage ±1% of Clamp Voltage Dynamic Range, after initially passing through its steady-state voltage, as shown in Figure 4. Clamp Voltage Dynamic Range is defined as VCLP(HIGH)(min) – VCLP(LOW)(max). Figure 1: Power-On Time Definition Figure 2: Propagation Delay and Rise Time Definitions Figure 3: Response Time Definition V +t VCC VCC(min) VOUT 90% VOUT 0 t1= time at which power supply reaches minimum specified operating voltage t2= time at which output voltage settles within ±10% of its steady-state value under an applied magnetic field t1 t2 tPO VCC(typ) Applied Magnetic Field Transducer Output 90 10 20 0 (%) Propagation Delay, tpd Rise Time, tr t Applied Magnetic Field Transducer Output 80 0 (%) Response Time, tRESPONSE t |
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