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US3881EUA

Description
SPECIALTY ANALOG CIRCUIT, PSIP3
Categoryaccessories   
File Size115KB,6 Pages
ManufacturerETC
Download Datasheet Compare View All

US3881EUA Overview

SPECIALTY ANALOG CIRCUIT, PSIP3

US3881
CMOS Low Voltage Hall Effect Latch
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
Solid state switch
Brushless DC motor commutation
Speed sensing
Linear position sensing
Angular position sensing
Current sensing
Ordering Information
Part No.
US3881
US3881
Temperature Suffix
Package
Temperature Range
E
SO or UA
-40
o
C to 85
o
C Commercial
L
SO or UA
-40
o
C to 150
o
C Automotive
* Contact factory or Sale Representative for legacy temperature options
Functional Diagram
Description
The US3881 is a bipolar Hall effect sensor IC fabri-
cated from mixed signal CMOS technology. It in-
corporates advanced chopper stabilization tech-
niques to provide accurate and stable magnetic
switch points. There are many applications for this
sensor in addition to those listed above. The de-
sign, specifications, and performance have been
optimized for commutation applications in 5V and
12V brushless DC motors.
The output transistor will be latched on (B
OP
) in the
presence of a sufficiently strong South pole mag-
netic field facing the marked side of the package.
Similarly, the output will be latched off (B
RP
) in the
presence of a North field.
SO Package
Pin 1 - V
DD
Pin 2 - Output
Pin 3 - GND
V
DD
Output
Voltage
Regulator
Chopper
GND
UA Package
Pin 1 - V
DD
Pin 2 - GND
Pin 3 - Output
The SOT-23 device is reversed from the UA pack-
age. 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.
Note:
Static sensitive device; please observe ESD precautions. Re -
verse V
DD
protection is not included. For reverse voltage protec -
tion, a 100Ω resistor in series with V
DD
is recommended.
US3881 CMOS Low Voltage Hall Effect Latch
3901003881 Rev 4.2
7/23/01
Page 1

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Description SPECIALTY ANALOG CIRCUIT, PSIP3 SPECIALTY ANALOG CIRCUIT, PSIP3 SPECIALTY ANALOG CIRCUIT, PSIP3 SPECIALTY ANALOG CIRCUIT, PSIP3 SPECIALTY ANALOG CIRCUIT, PSIP3
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