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Melexis

US4882 Datasheet Preview

US4882 Datasheet

CMOS Low Voltage High Sensitivity Latch

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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
Low IDD current
Applications
Solid state switch
Brushless DC motor commutation
Speed sensing
Ordering Information
Part No.
Temperature Suffix
US4881
E (-40°C to 85°C)
US4882
E (-40°C to 85°C)
US4882
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)
Contact factory or sales representative for legacy temperature code options
Functional Diagram
Description
The US4881/4882 are bipolar Hall effect sensor
IC’s fabricated from mixed signal CMOS
technology. Each incorporates advanced chopper
stabilization techniques to provide accurate and
stable magnetic switch points. The design
specifications and performance have been
optimized for commutation applications in
brushless DC motors and automotive speed
sensing.
The output transistor of the 4881 will be latched on
(BOP) in the presence of a sufficiently strong South
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 output transistor of the 4882 will switch on
(BOP) near or after the South to North zero crossing
transition of a multipole ring magnet field facing the
marked side of the package. The output will switch
off (BRP) near or after the zero crossing transition
from South to North Field.
Note: Static sensitive device; please observe ESD precautions.
Reverse VDD protection is not included. For reverse voltage
protection, a 100resistor in series with VDD is recommended.
The SOT-23 device is magnetically reversed from
the UA package. The SOT-23 output transistor will
be latched on (BOP) in the presence of a sufficiently
strong North pole magnetic field subjected to the
marked face.
3901004881
Rev. 008
Page 1
Sep/02




Melexis

US4882 Datasheet Preview

US4882 Datasheet

CMOS Low Voltage High Sensitivity Latch

No Preview Available !

US4881 and US4882 Electrical Specifications
DC operating parameters: TA = 25oC, VDD = 12VDC (unless otherwise specified).
Parameter
Symbol Test Conditions
Min Typ Max
Supply Voltage
VDD Operating
2.2 18
Supply Current
IDD B<BOP
1.5 2.0 5.0
Saturation Voltage
VDS(on)
IOUT = 20 mA, B>BOP
0.4 0.5
Output Leakage
IOFF B<BRP, VOUT = 18V
0.01 5.0
Output Rise Time
tr VDD = 12V, RL = 1.1K , CL = 20pf
¡
0.04
Output Fall Time
tf VDD = 12V, RL = 1.1K , CL = 20pf
¡
0.18
Units
V
mA
V
A 
s 
s 
US4881 Magnetic Specifications
Parameter
Symbol Test Conditions
Operating Point
Release Point
Hysteresis
Operating Point
Release Point
Hysteresis
BOP E/L UA, E/L SO, Ta= 25
Vdd=2.2 & 18 volts DC Vdd
BRP E/L UA, E/L SO, Ta= 25
Vdd=2.2 & 18 volts DC Vdd
Bhys E/L UA, E/L SO, Ta= 25
Vdd=2.2 & 18 volts DC Vdd
BOP EUA, ESO, Ta= 85
Vdd=2.2 & 18 volts DC Vdd
BRP EUA, ESO, Ta= 85
Vdd=2.2 & 18 volts DC Vdd
Bhys EUA, ESO, Ta= 85
Vdd=2.2 & 18 volts DC Vdd
Note: 1 mT = 10 Gauss.
Min Typ Max
0.5 2.0 4.5
-4.5 -2.0 -0.5
1.5 4.0 5.0
-1.0 2.0 6.0
-6.0 -2.0 -1.0
1.5 4.0 5.5
Units
mT
mT
mT
mT
mT
mT
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.
3901004881
Rev. 008
Page 2
Sep/02


Part Number US4882
Description CMOS Low Voltage High Sensitivity Latch
Maker Melexis
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US4882 Datasheet PDF





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