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A1242 Datasheet(PDF) 3 Page - Allegro MicroSystems |
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A1242 Datasheet(HTML) 3 Page - Allegro MicroSystems |
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3 / 11 page  3 A1242-DS Worcester, Massachusetts 01615-0036 (508) 853-5000 115 Northeast Cutoff, Box 15036 www.allegromicro.com Allegro MicroSystems, Inc. Two-Wire Chopper-Stabilized Hall Effect Latch A1242 DEVICE QUALIFICATION PROGRAM Contact Allegro for information. EMC (Electromagnetic Compatibility) PERFORMANCE Contact Allegro for information. ELECTRICAL CHARACTERISTICS over full operating voltage and temperature ranges, unless otherwise specified Characteristic Symbol Test Conditions Min. Typ.1 Max. Units Electrical Characteristics Supply Voltage2 3 VCC Operating, TJ < 165°C 3.5 – 24 V Supply Current ICC(L) -I1, B < BRP 5 – 6.9 mA -I2, B < BRP 2–5 mA ICC(H) -I1 and -I2, B > BOP 12 – 17 mA Output Slew Rate4 dI/dt RS = 100 Ω, CS = 20 pF, no bypass capacitor – 36 – mA/μs Chopping Frequency fC – 200 – kHz Power-On Time tPO VCC > VCC(MIN) –– 25 μs Power-On State5 POS tPO < tPO(max), dVCC/dt > 25 mV/μs– ICC(H) –– Supply Zener Clamp Voltage VZ(supply) ICC = 20 mA; TA = 25°C 28 – – V Supply Zener Current6 IZ(supply) VS = 28 V – – 20 mA Reverse Battery Current IRCC VRCC = –18 V – – 2.5 mA Magnetic Characteristics7 Operate Point BOP South pole adjacent to branded face of device 5 32 80 G Release Point BRP North pole adjacent to branded face of device –80 –32 –5 G Hysteresis BHYS BOP – BRP 40 64 110 G 1 Typical values are at TA = 25°C and VCC = 12 V. Performance may vary for individual units, within the specified maximum and minimum limits. 2 Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section. 3 VCC represents the generated voltage between the VCC pin and the GND pin. 4 The value of dI is the difference between 90% of ICC(H) and 10% of ICC(L), and the value of dt is time period between those two points. The value of dI/dt depends on the value of the bypass capacitor, if one is used, with greater capacitances resulting in lower rates of change. 5 For t > tPO(max), and BRP < B < BOP, POS is undefined. 6 Maximum current limit is equal to the maximum ICCL(max) + 3 mA. 7 Magnetic flux density, B, is indicated as a negative value for north-polarity magnetic fields, and as a positive value for south-polarity magnetic fields. This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the relative strength of the field is indicated by the absolute value of B, and the sign indicates the polarity of the field (for example, a –100 G field and a 100 G field have equivalent strength, but opposite polarity). |
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