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A1421 Datasheet(PDF) 4 Page - Allegro MicroSystems |
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A1421 Datasheet(HTML) 4 Page - Allegro MicroSystems |
4 / 16 page 4 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 OPERATING CHARACTERISTICS Valid at TA = – 40ºC to 150ºC, TJ ≤ 165°C; over operational air gap range and VCC within operating range, unless otherwise noted. Typical operating parameters: VCC=12 V and TA=25°C. Characteristic Symbol Test Conditions Min. Typ. Max. Units ELECTRICAL CHARACTERISTICS Supply Voltage VCC Operating; TJ < TJ(max) 4.0 12 26.5 V Supply Current ICC – 4.2 7.0 mA Output Saturation Voltage VOUT(SAT) ISINK = 20 mA – 140 400 mV Output Leakage Current IOFF VOUT = 24 V, Bdiff = 0 – – 5 μA PROTECTION COMPONENT CHARACTERISTICS Reverse Supply Current IRCC VCC = –18 V – – –1 mA Supply Zener Current IZSupply VS = 28 V – – 10 mA Supply Zener Clamp Voltage1 VZSupply ICC = 10 mA, TA = 25°C 28 33 37 V Output Zener Current IZOutput VOUT = 28 V – – 3 mA Output Zener Clamp Voltage VZOutput IOUT = 3 mA, TA = 25°C 28 – – V Output Short Circuit Current Limit IOUTS(lim) – – 50 mA RESPONSE CHARACTERISTICS Power-On State POS t < tResponse – High – V Power-On Time2,6 tPO VCC > VCC(min) – 4.5 9 ms Settling Time3,6 tSettling fBdiff ≥ 100 Hz 0 – 50 ms Response Time6 tResponse Equal to tPO + tSettling; fBdiff ≥ 100 Hz 4.5 – 59 ms Upper Corner Frequency fCU –3 dB, single pole 20 – – kHz Lower Corner Frequency fCL –3 dB, single pole – – 20 Hz OUTPUT CHARACTERISTICS Output Rise Time4 tr RPU = 1 kΩ, COUTC2 = 10 pF – – 200 ns Output Fall Time tf RPU = 1 kΩ, ISINK = 20 mA, COUTC2 = 10 pF – – 200 ns Continued on next page. |
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