A1244 ALLEGRO [Allegro MicroSystems], A1244 Datasheet
A1244
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A1244 Summary of contents
Page 1
... V+ VCC 0.01 μF A1244-DS, Rev. 1 Description The A1244 is a two-wire Hall-effect latch. The devices are produced on the Allegro process, which implements a patented high frequency, 4-phase, chopper-stabilization technique. This technique achieves magnetic stability over the full operating temperature range, and eliminates offsets inherent in devices with a single Hall element that are exposed to harsh application environments ...
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... A1244 Selection Guide Part Number Packing* A1244LLHLX-I1-T 13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount A1244LLHLX-I2-T 13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount A1244LUA-I1-T Bulk, 500 pieces/bag A1244LUA-I2-T Bulk, 500 pieces/bag ® *Contact Allegro for additional packing options Absolute Maximum Ratings Characteristic ...
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... A1244 ELECTRICAL CHARACTERISTICS range; unless otherwise noted Characteristics Supply Voltage 1,2 Supply Current Supply Zener Clamp Voltage Supply Zener Clamp Current Reverse Supply Current Output Slew Rate 3 Chopping Frequency 2,4,5 Power-Up Time Power-Up State 4,6 represents the generated voltage between the VCC pin and the GND pin. ...
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... A1244 THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance *Additional thermal information available on Allegro Web site. Application Information Symbol Test Conditions* Package LH, 1-layer PCB with copper limited to solder pads Package LH, 2-layer PCB with 0.463 in. ...
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... A Hall-Effect Latch A1244- 150° –40° 25° Supply Voltage, V (V) CC A1244-I1, –40° 150° 25° Supply Voltage, V (V) CC Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. ...
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... A1244-I1, 150° 25° –40° Supply Voltage, V (V) CC A1244-I1,I2 – –40° 25° 150° Supply Voltage, V (V) CC A1244-I1, 150° 25°C ...
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... This is shown in RP figure 1. Figure 1. Hysteresis for the A1244. On the horizontal axis, the B+ direc- tion indicates increasing south polarity magnetic field strength, and the B– direction indicates decreasing south polarity field strength (including the case of increasing north polarity). ...
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... Regulator Clock/Logic Amp Hall-Effect Latch R SENSE VCC C BYP A1244 0.01 μF GND (B) High side sensing Low-Pass Filter Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 8 ...
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... A1244 Power Derating The device must be operated below the maximum junction tem- perature of the device, T (max). Under certain combinations of J peak conditions, reliable operation may require derating supplied power or improving the heat dissipation properties of the appli- cation. This section presents a procedure for correlating factors affecting operating T ...
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... A1244 +0.12 2.98 –0.08 3 +0.10 2.90 –0. 10° REF 0.95 BSC For Reference Only; not for tooling use (reference DWG-2840) Dimensions in millimeters Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown Active Area Depth, 0.28 mm REF ...
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... A1244 45° E +0.08 3.02 –0.05 1.02 MAX 1 14.99 ±0.25 +0.05 0.43 –0.07 Package UA, 3-Pin SIP +0.08 4.09 –0. 2.04 1.52 ±0.05 10° 1.44 E 45° Branded Face 0.79 REF +0.03 0.41 –0.06 1.27 NOM Chopper-Stabilized, Two Wire Hall-Effect Latch Mold Ejector Pin Indent NNN 1 D Standard Branding Reference View = Supplier emblem N = Last three digits of device part number For Reference Only ...
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... A1244 Revision History Revision Rev. 1 Copyright ©2011-2012, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec tions as may be required to per- mit improvements in the per for mance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro’ ...