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SS1331ESOT Datasheet(PDF) 5 Page - SEC Electronics Inc. |
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SS1331ESOT Datasheet(HTML) 5 Page - SEC Electronics Inc. |
5 / 7 page SS1331 Unipolar Hall Switch-Low Sensitivity 5 V3.10 Nov 1, 2013 Application Information For proper operation, a 100nF bypass capacitor should be placed as close as possible to the device between the VDD and ground pin. For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin. When using a resistor, three points are important: - the resistor has to limit the reverse current to 50mA maximum (VCC / R1(≈50mA) - the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1 ∙I DD) - the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC 2/ R1) When using a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V). Therefore, a 100 Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended. Typical Three-Wire Application Circuit When a weak power supply is used or when the device is intended to be used in noisy environment, it is recom- mended that figure followed is used. The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occur- ring on the device supply voltage VDD. The diode D1 provides additional reverse voltage protection. Both solutions provide the required reverse voltage protection. Automotive and Harsh, Noisy Environments Three-Wire Circuit ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. |
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