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A3250LUA-T Datasheet(PDF) 3 Page - Allegro MicroSystems |
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A3250LUA-T Datasheet(HTML) 3 Page - Allegro MicroSystems |
3 / 15 page Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches A3250 and A3251 3 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com OPERATING CHARACTERISTICS valid over operating TA and VCC, unless otherwise specified Characteristic Symbol Test Conditions Min. Typ. Max. Units ELECTRICAL CHARACTERISTICS Supply Voltage1 VCC Running mode 4.2 – 24 V Output Saturation Voltage VOUT(sat) IOUT = 20 mA; Switch state = ON – 175 400 mV Output Leakage Current IOFF VOUT = 24 V; Switch state = OFF – – 10 μA Supply Current ICC(off) A3250; B < BRP; VOUT = HIGH – 4.0 7.0 mA A3251; B > BOP; VOUT = HIGH – 4.0 7.0 mA ICC(on) A3250; B > BOP; VOUT = LOW – 6.0 10.0 mA A3251; B < BRP; VOUT = LOW – 6.0 10.0 mA Output Rise Time tr RLOAD = 820 Ω, CLOAD = 10 pF – – 5.0 μs Output Fall Time tf RLOAD = 820 Ω, CLOAD = 10 pF – – 5.0 μs Chopping Frequency fC – 340 – kHz Power-Up Time ton VOUT = HIGH – 20 50 μs Output Current Limit1,2 IOUT(lim) Short-circuit protection 60 90 120 mA Power-On State POS A3250; B < BRP, t > ton – HIGH – mV A3251; B < BRP, t > ton – LOW – mV MAGNETIC CHARACTERISTICS Initial Operate Point BOP –20 13 50 G Temperature Drift of BOP ΔBOP BOP ≤ 500 gauss –35 – 35 G Hysteresis (BOP – BRP)Bhys Package TA range = J 5.0 18 35 G Package TA range = L 5.0 13 35 G PROGRAMMING CHARACTERISTICS Programmable BOP Values3 BOP(prog) 50 – ≥350 G Number of Programming Bits – Switchpoint set – 6 – Bit Programming lock – 1 – Bit Resolution BRES – 7.0 – G TRANSIENT PROTECTION CHARACTERISTICS Supply Zener Voltage VZ 28 – – V Supply Zener Current IZ VCC = 28 V – – 13 mA Reverse Battery Current IRCC VRCC = –18 V, TJ < TJ(max) – – –5.0 mA 1 Do not exceed TJ(max): Additional information on power derating is provided in the applications section. 2 Short-circuit protection is not intended for continuous operation; permanent damage may result. 3 Device can be used below 50 G but is not guaranteed to be a unipolar switch. It is the responsibility of the programmer to verify that the desired switchpoint has been achieved. |
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