US1881 Melexis Microelectronic Systems, US1881 Datasheet

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US1881

Manufacturer Part Number
US1881
Description
CMOS MULTI-PURPOSE LATCH
Manufacturer
Melexis Microelectronic Systems
Datasheet

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Features and Benefits
Ordering Information
Part No.
US1881
US1881
US1881
Applications
Pinout:
2 Description
The US1881 is the industry’s first Hall integrated circuit in SOT-23 package. The US1881 is a bipolar Hall effect
sensor IC based on mixed signal CMOS technology. It incorporates advanced chopper stabilization techniques to
provide accurate and stable magnetic switch points. There are many applications for this HED in addition to those
listed above. The design, specifications and performance have been optimized for commutation applications in 5V
and 12V brushless DC motors.
In UA packaged device the output transistor will be latched on (Bop) in 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 behaviour is reverse to the UA device. The SOT-23 output transistor will
be latched on (B
3901001881
Rev. 014
UA Package:
Pin1: VDD - supply
Pin2: GND - Ground
Pin3: OUT - Output
Chopper stabilized amplifier stage
Optimized for
Miniature high reliability package
Operation down to 3.5V
CMOS for optimum stability, quality and cost
Low power consumption
Solid state switch
Brushless DC motor commutation
Speed Sensing
Linear position sensing
Angular position sensing
Current sensing
OP
) in the presence of a sufficiently strong North pole magnetic field on the marked side
Temperature Suffix
E (-40° C to 85° C)
K (-40° C to 125° C)
L (-40° C to 150° C)
brushless DC
SO Package:
Pin1: VDD - supply
Pin2: OUT – Output
Pin3: GND - Ground
Page 1 of 12
motor applications
Package Code
SO (SOT-23) or UA(TO-92)
SO (SOT-23) or UA(TO-92)
SO (SOT-23) or UA(TO-92)
1 Functional Diagram
Note: Static electricity sensitive device; please observe
ESD precautions. Reverse voltage protection is not in-
cluded. For reverse polarity protection, a 100Ohm resistor
in series with V
DD
is recommended.
US1881
.
Jun/05

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US1881 Summary of contents

Page 1

... Pin3: OUT - Output 2 Description The US1881 is the industry’s first Hall integrated circuit in SOT-23 package. The US1881 is a bipolar Hall effect sensor IC based on mixed signal CMOS technology. It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There are many applications for this HED in addition to those listed above ...

Page 2

... Table of Contents 1 Functional Diagram....................................................................................................1 2 Description .................................................................................................................1 3 Glossary of Terms......................................................................................................3 4 Absolute Maximum Ratings ......................................................................................3 5 US1881 Electrical Characteristics ............................................................................3 6 Magnetic Characteristics...........................................................................................4 7 Unique Features .........................................................................................................4 8 Performance Graphs – unless otherwise specified Ta=25 8.1 Typical Magnetic Switch Points vs V 8.2 Magnetic Switch Points vs Temperature ......................................................................... 5 8.3 Output Voltage vs Magnetic Flux Density (Hysteresis).................................................... 5 8 ...

Page 3

... Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for extended periods may affect device reliability. Operating Temperature Range Temperature Suffix “E” Temperature Suffix “K” Temperature Suffix “L” 5 US1881 Electrical Characteristics DC operating parameters: T Parameter Supply Voltage Supply current Saturation Voltage ...

Page 4

... C,Vdd=3.5 … 24V KUA, KSO, Ta=125 C,Vdd=3.5 … 24V DC HYS o LUA, LSO, Ta=150 C,Vdd=3.5 … 24V LUA, LSO, Ta=150 C,Vdd=3.5 … 24V LUA, LSO, Ta=150 C,Vdd=3.5 … 24V DC HYS Page US1881 Min Typ Max Units 1.0 5.0 9.0 mT -9.0 -5.0 -1.0 mT 7.0 10.0 12.0 mT 0.5 5.0 9.5 mT -9.5 -5 ...

Page 5

... Performance Graphs – Typical Magnetic Switch Points vs V 8.1 Output Voltage vs Magnetic Flux Density 8.3 (Hysteresis) 3901001881 Rev. 014 unless otherwise specified Ta=25 Magnetic Switch Points vs Temperature 8.2 DD Typical Saturation Voltage vs Tempera- 8.4 ture(V Page US1881 o C, VDD=12V =12V;Iout=20mA) DD Jun/05 ...

Page 6

... Some differences may be observed between values in the specification tables and the performance graphs. graphs are based on initial characterization of several ICs from one lot. Hence a particular IC The performance may vary from the performance graphs but all ICs should meet the values stated in the specification tables. 3901001881 Rev. 014 DD Page US1881 . Jun/05 ...

Page 7

... The resistors RL and Rb can be used to bias the input current. Refer to the part specifications for limiting values Description Power Supply pin Hall output pin (clamped) Ground pin Page US1881 Two-Wire Circuit : OFF R DD ...

Page 8

... For more information on Melexis lead free statement see quality page at our website: http://www.melexis.com/html/pdf/MLXleadfree-statement.pdf 13 ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 3901001881 Rev. 014 Page US1881 Jun/05 ...

Page 9

... Physical Characteristics UA Package Information 14.1 3901001881 Rev. 014 Page US1881 Jun/05 ...

Page 10

... SOT23 Package Information 14.2 3901001881 Rev. 014 Page US1881 Jun/05 ...

Page 11

... For the latest version of this document our website at 3901001881 Rev. 014 www.melexis.com Or for additional information contact Melexis Direct: Europe and Japan: All other locations: Phone: +32 1367 0495 Phone: +1 603 223 2362 E-mail: sales_europe@melexis.com E-mail: sales_usa@melexis.com Page US1881 ISO/TS 16949 and ISO14001 Certified Jun/05 ...

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