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US2881
Bipolar Hall Switch - Very High Sensitivity
Description
Applications
Documents
Environmental
FAQ
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Download US2881 Datasheet (PDF)
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US2881 General Description
The Melexis US2881 is a bipolar Hall-effect switch designed in mixed signal CMOS technology.
The device integrates a voltage regulator, Hall sensor with dynamic offset cancellation system, Schmitt trigger and an open-drain output driver, all in a single package.
Thanks to its wide operating voltage range and extended choice of temperature range, it is suitable for use in automotive and consumer applications.
The device is delivered in a Thin Small Outline Transistor (TSOT) for surface mount process and in a Plastic Single In Line (TO-92 flat) for through-hole mount.
Both 3-lead packages are RoHS compliant.
US2881 Features and Benefits
Wide operating voltage range from 3.5V to 24V
Very high magnetic sensitivity
CMOS technology
Chopper-stabilized amplifier stage
Low current consumption
Open drain output
Thin SOT23 3L and flat TO-92 3L both RoHS Compliant packages
SE package North Pole Active
UA package South Pole Active
US2881 Related Products
Part Number
Description
MLX92211
Hall Latch - 2nd Generation - Very High Sensitivity
US2881 Applications
Brushless DC Fan Commutation
Seat position motor
Switches
Wiper Systems
Speed sensing
Flow Meter
Application Note
File Type
Size
Revision
Date
Action
Hall Applications Guide
PDF
498.0 KB
10/25/2005
Soldering Application Note and Recommendations
PDF
137.7 KB
2.1
2/3/2009
Trim and form recommendations
PDF
127.1 KB
3.11
4/13/2009
US2881 Documentation
DataSheet
File Type
Size
Revision
Date
Action
MLX92211 DataSheet
PDF
768.4 KB
2
9/19/2011
US2881 DataSheet
PDF
493.4 KB
012
10/10/2006
How It Works
File Type
Size
Revision
Date
Action
The Hall Effect Latch
SWF
14.9 KB
002b
2/23/2007
Virtual Hall Effect Demoboard
SWF
164.0 KB
12/9/2002
What is the Hall Effect?
SWF
16.8 KB
1
3/15/2007
Reference
File Type
Size
Revision
Date
Action
BLDC Fan Motor Driver Quick Reference
PDF
1.7 MB
004
10/4/2011
Hall Effect Latch and Switch Quick Reference
PDF
669.1 KB
006
4/6/2012
US2881 Tools
US2881 Environmental Information
Environmental Information
File Type
Size
Revision
Date
Action
Green / Halogen Free Compliance Declaration US2881
PDF
39.7 KB
1.0
10/7/2009
Package Material Declaration - TSOT3 GR - S1
PDF
105.1 KB
7.0
1/25/2012
Package Material Declaration - UA GR - S3
PDF
97.2 KB
7.0
1/25/2012
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US2881 In The Press
US2881 Frequently asked Questions
US2881 to detect AC (120/240V)
Question
Can I use US2881 to detect if an equipment is ON (drawing current < 1A max 20A). At 1 A and 0.1"" away the flux is only 0.8G or 0.08mT. Are there any low cost off the shelf toroids or anything else that would increase the flux? I am guessing I would need 4mT and the output would be switching at line frequency (50/60 Hz), right?
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