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PDF US1881 Data sheet ( Hoja de datos )
| Número de pieza | US1881 | |
| Descripción | CMOS MULTI-PURPOSE LATCH | |
| Fabricantes | Melexis Microelectronic Systems | |
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US1881
Features and Benefits
Chopper stabilized amplifier stage
Optimized for brushless DC motor applications
Miniature high reliability package
Operation down to 3.5V
CMOS for optimum stability, quality and cost
Low power consumption
Ordering Information
Part No.
US1881
US1881
US1881
Temperature Suffix
E (-40°C to 85°C)
K (-40°C to 125°C)
L (-40°C to 150°C)
Package Code
SO (SOT-23) or UA(TO-92)
SO (SOT-23) or UA(TO-92)
SO (SOT-23) or UA(TO-92)
Applications
Solid state switch
Brushless DC motor commutation
Speed Sensing
Linear position sensing
Angular position sensing
Current sensing
Pinout:
1 Functional Diagram
UA Package:
Pin1: VDD - supply
Pin2: GND - Ground
Pin3: OUT - Output
SO Package:
Pin1: VDD - supply
Pin2: OUT – Output
Pin3: GND - Ground
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 VDD is recommended.
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 (BOP) in the presence of a sufficiently strong North pole magnetic field on the marked side.
3901001881
Rev. 014
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US1881
8 Performance Graphs – unless otherwise specified Ta=25oC, VDD=12V
8.1 Typical Magnetic Switch Points vs VDD 8.2 Magnetic Switch Points vs Temperature
8.3 Output Voltage vs Magnetic Flux Density 8.4 Typical Saturation Voltage vs Tempera-
(Hysteresis)
ture(VDD=12V;Iout=20mA)
3901001881
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US1881
15 Disclaimer
Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its
Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the
information set forth herein or regarding the freedom of the described devices from patent infringement.
Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior
to designing this product into a system, it is necessary to check with Melexis for current information. This
product is intended for use in normal commercial applications. Applications requiring extended temperature
range, unusual environmental requirements, or high reliability applications, such as military, medical life-
support or life-sustaining equipment are specifically not recommended without additional processing by
Melexis for each application.
The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be
liable to recipient or any third party for any damages, including but not limited to personal injury, property
damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential
damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical
data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis’ rendering
of technical or other services.
© 2002 Melexis NV. All rights reserved.
For the latest version of this document. Go to our website at
www.melexis.com
Or for additional information contact Melexis Direct:
Europe and Japan:
Phone: +32 1367 0495
E-mail: [email protected]
All other locations:
Phone: +1 603 223 2362
E-mail: [email protected]
ISO/TS 16949 and ISO14001 Certified
3901001881
Rev. 014
Page 11 of 11
Jun/05
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet US1881.PDF ] | |
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