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What is US3881?

This electronic component, produced by the manufacturer "Melexis", performs the same function as "CMOS Low Voltage Hall Effect Latch".


US3881 Datasheet PDF - Melexis

Part Number US3881
Description CMOS Low Voltage Hall Effect Latch
Manufacturers Melexis 
Logo Melexis Logo 


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Total 8 Pages



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Features and Benefits
Chopper stabilized amplifier stage
Optimized for BDC motor applications
New miniature package / thin, high reliability package
Operation down to 2.2V
CMOS for optimum stability, quality, and cost
Applications
mSolid state switch
Brushless DC motor commutation
oSpeed sensing
.cLinear position sensing
Angular position sensing
UCurrent sensing
t4Ordering Information
Part No.
Temperature Suffix
eUS3881
E (-40°C to 85°C)
US3881
L (-40°C to 150°C)
Package
SO (SOT-23) or UA (TO-92)
SO (SOT-23) or UA (TO-92)
he* Contact factory or Sale Representative for legacy temperature options
www.DataS Sheet4U.comFunctional Diagram
Description
The US3881 is a bipolar Hall effect sensor IC
fabricated from mixed signal CMOS technology. It
incorporates advanced chopper stabilization
techniques to provide accurate and stable magnetic
switch points. There are many applications for this
sensor in addition to those listed above. The design,
specifications, and performance have been
optimized for commutation applications in 5V and
12V brushless DC motors.
The output transistor will be latched on (BOP) in the
presence of a sufficiently strong South pole
magnetic field facing the marked side of the
package. Similarly, the output will be latched off
(BRP) in the presence of a North field.
The SOT-23 device is reversed from the UA
package. The SOT-23 output transistor will be
latched on in the presence of a sufficiently strong
North pole magnetic field subjected to the marked
face.
ataNote: Static sensitive device; please observe ESD precautions.
.DReverse VDD protection is not included. For reverse voltage
protection, a 100W resistor in series with VDD is recommended.
ww3901003881
wRev. 012
Page 1
Sept/02

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US3881 equivalent
Unique Features
CMOS Hall IC Technology
The chopper stabilized amplifier uses switched
capacitor techniques to eliminate the amplifier
offset voltage, which, in bipolar devices, is a
major source of temperature sensitive drift.
CMOS makes this advanced technique possible.
The CMOS chip is also much smaller than a
bipolar chip, allowing very sophisticated circuitry
to be placed in less space. The small chip size
also contributes to lower physical stress and less
power consumption.
Applications
If reverse supply protection is desired, use a
resistor in series with the VDD pin. The resistor
will limit the Supply Current (Fault), IDD, to 50
mA. For severe EMC conditions, use the
application circuit below.
Installation
Consider temperature coefficients of Hall IC and
magnetics, as well as air gap life time variations.
Observe temperature limits during wave
soldering.
Applications Examples
3901003881
Rev. 012
Page 5
Sept/02


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Preview 5 Page


Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for US3881 electronic component.


Information Total 8 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
US3881The function is CMOS Low Voltage Hall Effect Latch. MelexisMelexis

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