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Allegro MicroSystems A1321 manual

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Table of contents for the manual

  • Page 1

    NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegr o Micr oSystems, Inc. r eserves the right to make, fr om time to time, r evisions to the anticipated pr oduct life cycle plan for a pr oduct to accommodate changes in pr oduction capabilities, alternative pr o[...]

  • Page 2

    Description The A132X family of linear Hall-effect sensor ICs are optimized, sensitive, and temperature-stable. These ratiometric Hall-ef fect sensor ICs provide a voltage output that is proportional to the applied magnetic field. The A132X family has a quiescent output voltage that is 50% of the supply voltage and output sensitivity options of 2.5[...]

  • Page 3

    recoverability after temperature cycling. Having the Hall element and an amplifier on a single chip minimizes many problems normally associated with low-level analog signals. Output precision is obtained by internal gain and offset trim adjustments made at end-of-line during the manufacturing process. The A132X family is provided in a 3-pin single [...]

  • Page 4

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 3 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com T erminal List Symbol Number Description Package LH Package UA VCC 1 1 Connects power supply to chip VOUT 2 3 Output from[...]

  • Page 5

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 4 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com DEVICE CHARACTERISTICS 1 over operating temperature (T A ) range, unless otherwise noted Characteristic Symbol T est Cond[...]

  • Page 6

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 5 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com MAGNETIC CHARACTERISTICS 1,2 over operating temperature range, T A ; V CC = 5 V , I out = –1 mA; unless otherwise noted[...]

  • Page 7

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 6 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Quiescent V oltage Output. In the quiescent state (no magnetic fi eld), the output equals one half of the supply voltage[...]

  • Page 8

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 7 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com T ypical Characteristics (30 pieces, 3 fabrication lots) Av erage Supply Current (I CC ) vs Temperature V cc = 5 V 0 0.5 [...]

  • Page 9

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 8 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com T ypical Characteristics, continued (30 pieces, 3 fabrication lots) Av erage Absolute Quiescent Output Voltage, V out(q) [...]

  • Page 10

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 9 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Symbol T e[...]

  • Page 11

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 10 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Power Derating The device must be operated below the maximum junction temperature of the device, T J(max) . Under certai[...]

  • Page 12

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 11 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Package LH, 3-Pin (SOT -23W) 0.55 REF Gauge Plane Seating Plane 0.25 BSC 0.95 BSC 0.95 1.00 0.70 2.40 2 1 A Active Area [...]

  • Page 13

    Ratiometric Linear Hall Ef fect Sensor ICs for High-T emperature Operation A1321, A1322, and A1323 12 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com For the latest version of this document, visit our website: www .allegromicro.com Copyright ©2004-2010, Allegro MicroSy[...]