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TLE4976-2K PDF Datasheet - Infineon

Part Number TLE4976-2K
Description Hall Effect Switch
Manufacturers Infineon 
Logo Infineon Logo 
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TLE4976-2K datasheet, circuit
TLE4976-2K
Hall Effect Switch with Current Interface
Data Sheet
Rev. 1.2, 2010-08-05
Sense & Control

1 page
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TLE4976-2K pdf, schematic
Edition 2010-08-05
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2010 Infineon Technologies AG
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any
information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties
and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights
of any third party.
Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements, components may contain dangerous substances. For information on the types in
question, please contact the nearest Infineon Technologies Office.
Infineon Technologies components may be used in life-support devices or systems only with the express written
approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure
of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support
devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain
and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may
be endangered.

2 Page
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TLE4976-2K equivalent
Hall Effect Switch
TLE4976-2K
Hall Effect Switch
1 Product Description
1.1 Overview
The TLE4976-2K is a high precision unipolar Hall switch with a two wire,
6mA/14mA current interface in a SMD package. A chopped measurement
principle provides high stability switching thresholds for operating
temperatures between -40°C and 150°C.
1.2 Features
• 3.0V to 26V supply voltage operation
• High sensitivity and high stability of the magnetic switching points
• High resistance to mechanical stress by Active Error Compensation
• Reverse battery protection (-18V)
• Superior temperature stability
• Peak temperatures up to 195°C without damage
• Low jitter (typ. 1µs)
• High ESD performance (± 8kV HBM)
• Digital output signal with current modulation 6 / 14mA
• Unipolar version
• SMD package SC59 (SOT23 compatible)
1.3 Target Applications
The sensor targets all applications where a high precision unipolar magnetic switch is required (e.g. position
sensing). Due to the current interface the number of wires required in the application is minimized thus saving
costs and increasing reliability. This is specially helpful in all applications where the microcontroller is not on the
same PCB as the Hall switch but in some distance.
Product Name
TLE4976-2K
Data Sheet
Product Type
Hall Effect Switch
Ordering Code
SP000505028
3
Package
SC59
Rev. 1.2, 2010-08-05

5 Page
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TLE4976-2K diode, scr
3 Specification
TLE4976-2K
Specification
3.1 Application Circuit
The advantage of the current interface is, that only two wires are necessary to connect the sensor.
At least one series resistor is required to convert the two output states of the Hall sensor from current consumption
to a voltage information.
A typical value for RL is 100Ω. This gives a typical signal voltage level VSIG = 0.8V in the Off state and 1.4V in the
On state.
If the sensor is operated in an application environment with disturbances on the supply line, an additional series
resistor RS is recommended. The maximum value for the series resistor RS can be calculated using the following
formula:
RSmax = V----S---u---p--pI---Sl-y-h--m-i-g--i-hn--m--–--a--Vx----S---m----i-n- – RL
VS_min is the minimal supply voltage which might occur due to disturbances on the supply line VS.
Example: VSupplymin = 6V; VSmin = 3V; RL = 100Ω; IShighmax = 17mA : RSmax = 76.5Ω
V S uppl y
RS
4.7 nF
VS
TLE
4976-2K
GND
µC
VSIG Input
RL
µC GND
Figure 5 Application Circuit
Data Sheet
7 Rev. 1.2, 2010-08-05

9 Page





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