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SS40A Datasheet Preview

SS40A Datasheet

CMOS Omnipolar High Sensitivity Micropower Hall Switch

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SS40A
CMOS Omnipolar High Sensitivity Micropower Hall Switch
Packages
3 pin SIP (suffix UA)
 
Features and Benefits
1. Operation down to 2.5V
2. Wide operating voltage range
3. High sensitivity for direct reed switch replacement
applications
4. Omnipolar, output switches with absolute
5. value of North or South pole from magnet
6. Temperature compensation
7. Open-Collector pre-driver
8. 60V maximum withstand voltage
9. Reverse polarity protection
10. Package: TO-92S(SIP)
Functional Block Diagram
Application Examples
1. Brush-less DC Motor
2. Brush-less DC Fan
3. Revolution counting
4. Speed measurement
www.DataSheet.net/
 
General Description:
The SS40A Omnipolar Hall effect sensor IC is fabricated from mixed signal CMOS technology. It incorporates
advanced chopper-stabilization techniques to provide accurate and stable magnetic switch points.
The circuit design provides an internally controlled clocking mechanism to cycle power to the Hall element and
analog signal processing circuits. This serves to place the high current-consuming portions of the circuit into a
“Sleep” mode. Periodically the device is “Awakened” by this internal logic and the magnetic flux from the Hall
element is evaluated against the predefined thresholds. If the flux density is above or below the BOP/BRP thresholds
then the output transistor is driven to change states accordingly. While in the “Sleep” cycle the output transistor is
latched in its previous state. The design has been optimized for service in applications requiring extended operating
lifetime in battery powered systems. An internal bandgap regulator is used to provide temperature compensated supply
voltage for internal circuits and allows a wide operating supply range.
The output transistor of the SS40A will be latched on (BOP) in the presence of a sufficiently strong South or North
magnetic field facing the marked side of the package. The output will be latched off (BRP) in the absence of a
magnetic field.
1 V1.10 May 1, 2011
Datasheet pdf - http://www.DataSheet4U.co.kr/




SEC

SS40A Datasheet Preview

SS40A Datasheet

CMOS Omnipolar High Sensitivity Micropower Hall Switch

No Preview Available !

SS40A
CMOS Omnipolar High Sensitivity Micropower Hall Switch
Typical Application Circuit
SEC's pole-independent sensing technique allows for operation with either a north pole or south pole magnet
orientation, enhancing the manufacturability of the device. The state-of-the-art technology provides the same output
polarity for either pole face.
It is strongly recommended that an external bypass be connected (in close proximity to the Hall sensor) between the
supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization
technique. This is especially true due to the relatively high impedance of battery supplies.
Functional Block Diagrams
www.DataSheet.net/
V DD 
 
Voltage 
Hall Plate 
Amp
 
  Output 
  GND 
 
2 V1.10 May 1, 2011
Datasheet pdf - http://www.DataSheet4U.co.kr/


Part Number SS40A
Description CMOS Omnipolar High Sensitivity Micropower Hall Switch
Maker SEC
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SS40A Datasheet PDF





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