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A3058EU Datasheet(PDF) 2 Page - Allegro MicroSystems |
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A3058EU Datasheet(HTML) 2 Page - Allegro MicroSystems |
2 / 8 page 3046, 3056, AND 3058 HALL EFFECT GEAR-TOOTH SENSORS –ZERO SPEED 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 All devices, when used with a back- biasing magnet, can be configured to turn ON or OFF with the leading or trailing edge of a gear tooth or slot. Changes in fields on the magnet face caused by a moving ferrous mass are sensed by two integrated Hall transducers and are differentially amplified by on-chip electronics. The on-chip temperature compensation and Schmitt trigger circuitry minimizes shifts in effective working air gaps and switch points over temperature making these devices ideal for use in ignition timing, anti-lock braking systems, and speed mea- surement systems in hostile automotive and industrial environments. Each Hall effect digital Integrated circuit includes two quadratic Hall effect sensing elements, a voltage regulator, temperature compensating circuitry, low-level amplifier, Schmitt trigger, and an open-collector output driver. The on-board regulator permits operation with supply voltages of 4.5 to 24 volts. The output stage can switch up to 20 mA at conservatively specified repetition rates to 20 kHz and is compatible with bipolar and MOS logic circuits. FUNCTIONAL BLOCK DIAGRAM Both magnetic characteristics are available in a choice of two operat- ing temperature ranges. Suffix EU devices have an operating range of -40 °C to +85°C while suffix LU devices feature an operating range of -40 °C to +150°C. All devices are packaged in a 3-pin plastic SIP. ELECTRICAL CHARACTERISTICS at VCC = 8 V, over operating temperature range. Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Supply Voltage VCC Operating 4.5 — 24 V Power-Up State — 3058* only, Output is OFF — VCC = 0 4.5 V, B < BOP Output Saturation Voltage VOUT(SAT) IOUT = 20 mA, B > BOP — 135 400 mV Output Leakage Current IOFF VCC = VOUT = 24 V, B < BRP — — 5.0 µA Supply Current ICC VCC = 24 V, B < BRP — 7.2 14 mA Output Rise time tr RL = 820 Ω, CL = 20 pF — 100 — ns Output Fall time tf RL = 820 Ω, CL = 20 pF — 100 — ns OUTPUT X X Dwg. FH-010 SUPPLY GROUND REG + – 1 2 3 Copyright © 1989, 1995 Allegro MicroSystems, Inc. |
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