A1140 Allegro MicroSystems, A1140 Datasheet
A1140
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A1140 Summary of contents
Page 1
... The output currents of the A1141 and A1143 switch polarity magnetic fi eld of suffi cient strength; and switch when there is no signifi cant magnetic fi eld present. The A1140 and A1142 have inverted output current levels: switching magnetic fi eld of suffi cient strength, and their specifi ...
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... A1143ELH A1143EUA A1143LLH A1143LUA 1 South (+) magnetic fi elds must be of suffi cient strength. 2 Includes north (–) magnetic fi elds of suffi cient strength, and weak fi elds of either polarity. A1140-DS A1140/41/42/43 Functional Block Diagram Program/Lock Programming Offset Logic Clock/Logic Low-Pass ...
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... B values indicate a stronger south polarity fi eld (or a weaker north polarity fi eld, if present). A1140-DS A1140/41/42/43 over the operating voltage and temperature range, unless otherwise specifi ed Test Conditions V Device powered >B for A1140; B < CC(L) B >B for A1142; B < > ...
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... Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches I versus Ambient Temperature CC(L) at Various Levels of V (A1140, A1141, A1142, A1143 – Ambient Temperature, T Switchpoint versus Ambient Temperature (A1143) 110 105 100 – Ambient Temperature, T EMC (Electromagnetic Compatibility) Requirements ...
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... Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance A1140-DS A1140/41/42/43 Symbol Test Conditions Package LH, minimum-K PCB (single-sided with copper limited to solder pads) Package LH, low-K PCB (double-sided with R θJA ...
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... Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches Operation The output the A1140 and A1142 devices switch low CC after the magnetic fi eld at the Hall sensor exceeds the oper- ate point threshold When the magnetic fi eld is reduced to OP below the release point threshold high ...
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... The chopping occurs on each clock edge, result- Hall Element Figure 2. Chopper stabilization circuit (dynamic quadrature offset cancellation) A1140-DS A1140/41/42/43 ing in a 400 kHz chop frequency. This high-frequency opera- tion allows a greater sampling rate, which results in higher accuracy and faster signal-processing capability. This approach ...
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... R and the ECU sense resistor must be taken into consideration. The typical value for SENSE R is approximately 100 Ω. SENSE A1140-DS A1140/41/42/43 Application Information reduces both external BYP , and it serves BYP (not shown), in combi- S requirement of the A114x V+ ...
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... I ), without exceeding T CC(max) CC(max selected R and T . θJA A A1140-DS A1140/41/42/43 Example: Reliability for V minimum-K PCB. Observe the worst-case ratings for the device, specifi cally: R θJA I CC(max) Calculate the maximum allowable power level, P invert equation fi gure of merit sum- ∆ ...
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... Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches 3.10 .122 2.90 .114 3 0.96 .038 NOM 2.10 .083 1.85 .073 3.00 .118 2.70 .106 1 0.50 .020 0.30 .012 0.55 .022 REF .122 .117 A1140-DS A1140/41/42/43 Package LH, 3-Pin; (SOT-23W) 1.49 .059 8º NOM 0º 0.28 .011 0.20 .008 NOM 0.13 .005 A 0.25 .010 MIN 2 0.25 .010 BSC Seating Plane Gauge Plane 1.13 .045 0.87 ...
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... Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches A1140-DS A1140/41/42/43 The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec i fi ...