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A1360_V Datasheet(PDF) 12 Page - Allegro MicroSystems |
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A1360_V Datasheet(HTML) 12 Page - Allegro MicroSystems |
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12 / 26 page 
A1360, A1361, and A1362 Symmetry Sensitivity Error The magnetic sensitivity of an A136x device is constant for any two applied magnetic fields of equal magnitude and opposite polarities. Symmetry error, SymERR (%), is measured and defined as: Sens BPOS Sens BNEG 1– Sym ERR = ×100% , ⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ (12) where SensBx is as defined in equation 4, and BPOS and BNEG are positive and negative magnetic fields such that |BPOS| = |BNEG|. Note that the symmetry error specification is only valid for bipolar devices. Ratiometry Error The A136x devices feature ratiometric output. This means that the quiescent voltage output, VOUT(Q), magnetic sensitivity, Sens, and clamp voltage, VCLP(HIGH) and VCLP(LOW), are proportional to the supply voltage, VCC. In other words, when the supply voltage increases or decreases by a certain percent- age, each characteristic also increases or decreases by the same percentage. Error is the difference between the measured change in the supply voltage relative to 5 V, and the measured change in each characteristic. The ratiometric error in quiescent voltage output, RatERRVOUT(Q) (%), for a given supply voltage, VCC, is defined as: V OUT(Q)(VCC) / VOUT(Q)(5V) V CC / 5 V 1– Rat ERRVOUT(Q) = ×100% . ⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ (13) The ratiometric error in magnetic sensitivity, RatERRSENS (%), for a given supply voltage, VCC, is defined as: Sens (VCC) / Sens(5V) V CC / 5 V 1– Rat ERRSENS = ×100% . ⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ (14) The ratiometric error in the clamp voltages, RatERRCLP (%), for a given supply voltage, VCC, is defined as: V CLP(VCC) / VCLP(5V) V CC / 5 V 1– Rat ERRCLP = ×100% , ⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ (15) where VCLP is either VCLP(HIGH) or VCLP(LOW). Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Maximum) and Analog Output 12 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com |
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