A1227 ALLEGRO [Allegro MicroSystems], A1227 Datasheet
A1227
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A1227 Summary of contents
Page 1
... The symmetry capability makes these devices ideal for use in pulse-counting applications where duty cycle is an important parameter. The three basic devices (A1225, A1227, and A1229) are identical except for magnetic switchpoints. Each device includes on a single silicon chip a voltage regulator, ...
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... A1225, A1227 Hall Effect Latch for High Temperature Operation A1229 and Selection Guide * Part Number Packing A1225LLTTR-T 7-in. reel, 1000 pieces/reel A1225LUA-T Bulk, 500 pieces/bag A1227LLTTR-T 7-in. reel, 1000 pieces/reel A1227LUA-T Bulk, 500 pieces/bag A1229LLTTR-T 7-in. reel, 1000 pieces/reel A1229LUA-T Bulk, 500 pieces/bag *Contact Allegro ® ...
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... A1225, A1227 Hall Effect Latch for High Temperature Operation A1229 and ELECTRICAL CHARACTERISTICS Characteristics Electrical Characteristics Supply Voltage Supply Current Supply Zener Voltage Reverse Battery Current Power-On Time 3 Power-On State Chopping Frequency Output Stage Characteristics Output Saturation Voltage Output Leakage Current ...
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... A1225, A1227 Hall Effect Latch for High Temperature Operation A1229 and may require derating at maximum conditions, see application information THERMAL CHARACTERISTICS Characteristic Package Thermal Resistance *Additional thermal information available on Allegro website. 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 ...
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... T (°C) A Average Output Saturation Voltage versus Ambient Temperature 300 250 200 150 100 (°C) A Characteristic Performance A1225, A1227, and A1229 Electrical Characteristics 6.0 5.5 5.0 4.5 4.0 V (V) CC 3.5 3.8 3.0 4.5 2.5 12 2.0 24 1.5 1.0 0.5 100 120 140 160 6.0 5.5 5.0 4.5 V (V) 4.0 CC 3.5 3.8 3.0 4.5 2.5 12 2.0 24 1.5 1.0 0.5 100 120 140 160 ...
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... A1225, A1227 Hall Effect Latch for High Temperature Operation A1229 and Operate Point versus Ambient Temperature 300 280 260 240 220 200 180 160 140 - 100 120 140 160 T (°C) A Release Point versus Ambient Temperature - 140 - 160 ...
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... Switchpoint Hysteresis versus Ambient Temperature 350 325 300 275 250 225 200 175 150 125 100 - 100 120 140 160 T (°C) A A1227 Magnetic Characteristics Operate Point versus Supply Voltage 175 163 150 138 V (V) CC 125 3.8 113 12 24 100 ...
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... A1225, A1227 Hall Effect Latch for High Temperature Operation A1229 and Operate Point versus Ambient Temperature 200 190 180 170 160 150 140 130 120 110 100 100 120 140 T (°C) A Release Point versus Ambient Temperature ...
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... A1229 and Functional Description and Application Information Switching Behavior The output of the A1225, A1227, and A1229 devices switches low (turns on) when a magnetic field perpendicular to the Hall element exceeds the operate point threshold, B After turn-on, the output is capable of sinking 25 mA and the output voltage Notice that the device latches ...
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... A1225, A1227 Hall Effect Latch for High Temperature Operation A1229 and Chopper Stabilization Technique When using Hall-effect technology, a limiting factor for switchpoint accuracy is the small signal voltage developed across the Hall element. This voltage is disproportionally small relative to the offset that can be produced at the output of the Hall sen- sor IC ...
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... A1225, A1227 Hall Effect Latch for High Temperature Operation A1229 and +0.13 4.47 –0.08 1.73 ±0.10 E 2.24 B +0.03 2.57 +0.10 –0.28 4.14 –0. 10° REF +0.05 0.43 –0.07 0.51 2X 1.50 NOM Package LT 3-Pin SOT-89 +0.03 0.41 –0.06 0.38 MIN D E 6° REF 1.14 Parting Line 2.16 REF 10° REF 1.04 ±0.15 Branded Face +0.15 1.45 –0.05 +0.05 –0.07 2.50 2.00 0.80 2.60 4.60 1.20 1.50 0.70 PCB Layout Reference View ...
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... A1225, A1227 Hall Effect Latch for High Temperature Operation A1229 and 45° +0.08 3.02 –0.05 2.16 MAX 0.51 REF 15.75 ±0.51 +0.05 0.43 –0.07 Copyright ©2009-2010, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of the following U.S. patents: 5,619,137; 5,621,319; 7,425,821 and other patents pending. ...