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Details, datasheet, quote on part number:US3881L
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Datasheet text preview:
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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 Solid state switch Brushless DC motor commutation Speed sensing Linear position sensing Angular position sensing Current sensing
Applications
Ordering Information
Part No. US3881 US3881 Temperature Suffix E (-40°C to 85°C) L (-40°C to 150°C) Package SO (SOT-23) or UA (TO-92) SO (SOT-23) or UA (TO-92)
* Contact factory or Sale Representative for legacy temperature options
Functional 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.
Note: Static sensitive device; please observe ESD precautions. Reverse VDD protection is not included. For reverse voltage protection, a 100W resistor in series with VDD is recommended. 901003881 Rev. 012 Page 1 Sept/02
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US3881 Electrical Specifications
DC Operating Parameters: TA = 25, VDD = 12VDC (unless otherwise specified). Parameter Supply Voltage Supply Current Saturation Voltage Output Leakage Output Rise Time Output Fall Time Symbol Test Conditions V DD I DD VDS(on) IOFF tr tf Operating BBOP BTyp
Max 18 4.0 0.5
Units V mA V A
10.0
s s
0.18
US3881 Magnetic Specifications
Parameter
Operating Point Release Point Hysteresis Operating Point Release Point Hysteresis
Symbol Test Conditions
BOP B RP Bhys BOP B RP Bhys
EUA,ESO 25 & 85°C, Vdd=2.2 & 18 volts DC EUA,ESO 25 & 85°C, Vdd=2.2 & 18 volts DC EUA,ESO 25 & 85°C, Vdd=2.2 & 18 volts DC LUA, LSO 25 & 150°C, Vdd=2.2 & 18 volts DC LUA,LSO 25 & 150°C, Vdd=2.2 & 18 volts DC LUA,LSO 25 & 150°C, Vdd=2.2 & 18 volts DC
Min
1.0 -9.0 5.5 1.0 -9.0 5.5
Typ
5.0 -5.0 10.0 5.0 -5.0 10.0
Max
9.0 -1.0 12.0 9.0 -1.0 12.0
Units
mT mT mT mT mT mT
Absolute Maximum Ratings
Supply Voltage (Operating), VDD Supply Current (Fault), IDD Output Voltage, VOUT Output Current (Fault), IOUT Power Dissipation, PD Operating Temperature Range, TA Storage Temperature Range, TS Maximum Junction Temp, TJ 18V 50mA 18V 50mA 100mW -40 to 150°C -65 to 150°C 175°C
Melexis Inc. reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Melexis does not assume any liability arising from the use of any product or application of any product or circuit described herein.
901003881 Rev. 012
Page 2
Sept/02
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Performance Graphs
Typical Magnetic Switch Points vs. Vdd
12.5 10.0 7.5 Field Strength (mT) 5.0 2.5 0.0 -2.5 -5.0 -7.5 - 10.0 - 12.5 0.0 5.0 10.0 V dd (V) 15.0 20.0 3881
901003881 Rev. 012
Page 3
Sept/02
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