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TLE4921-2

Features: · AC coupled· Digital output signal· Two-wire and three-wire configuration possible· Large temperature range· Large distance, low frequency cut-off· Protection against overvoltage· Protection against reversed polarity· Output protection against electrical disturbancesApplicationTwo possi...

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SeekIC No. : 004521019 Detail

TLE4921-2: Features: · AC coupled· Digital output signal· Two-wire and three-wire configuration possible· Large temperature range· Large distance, low frequency cut-off· Protection against overvoltage· Protect...

TLE4921-2 Data Sheet

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Part Number:
TLE4921-2
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· AC coupled
· Digital output signal
· Two-wire and three-wire configuration possible
· Large temperature range
· Large distance, low frequency cut-off
· Protection against overvoltage
· Protection against reversed polarity
· Output protection against electrical disturbances


Application

Two possible applications are shown in figure 7 and 8 (Toothed and Magnet Wheel). The differences between two-wire and three-wire application is shown in figure 9.


Pinout

Connection Diagram


Specifications

TA = 40 to 125 °
Parameter Symbol Limit Values Unit Remarks
min. max.
Supply voltage VS -40 30 V -
Output voltage VQ -0.7 30 V  
Output current IQ - 50 mA -
Output revers current IQ - 50 mA -
Capacitor voltage VC -0.3 3 V -
Junction temperature
Junction temperature
Junction temperature		 Tj
Tj
Tj		 - 150
170
210		 °C
°C
°C
1000 h
40 h
Storage temperature Ts -40 150 °C
Thermal resistance
                             PSSO-4-1
Rth JA		 -
 190 K/W  
Current through inputprotection
device
Current through outputprotection
device		 ISZ
IQZ		 -200 200
200		 mA
mA		 t < 2 ms ; v = 0.1
t < 2 ms ; v = 0.1



Description

The Differential Hall Sensor IC TLE4921-2 detects the motion of, and static position of, ferromagnetic and permanent magnet structures by measuring the differential flux density of the magnetic field. To detect ferromagnetic objects the magnetic field must be provided by a back biasing permanent magnet (southpole of the magnet attached to the back, unmarked, side of the IC package).

Using an external capacitor the generated Hall-voltage signal TLE4921-2 is slowly adjusted via an active high pass filter with low frequency cutoff. This causes the output to switch into a biased mode after a time constant is elapsed. The time constant is determined by the external capacitor. Filtering avoids aging and temperature influence from Schmitt-trigger input and eliminates device and magnetic offset.

The TLE4921-2 can be exploited to detect toothed wheel rotation in a rough environment. Jolts against the toothed wheel and ripple have no influence on the output signal. Furthermore the TLE 4921-2U can be operated in a two-wire - as well as in a three-wire-configuration.

The output is logic compatible by high/low levels regarding on and off.




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