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SS275EUA 数据表(PDF) 4 Page - SEC Electronics Inc. |
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SS275EUA 数据表(HTML) 4 Page - SEC Electronics Inc. |
4 / 6 page SS275 CMOS Omnipolar High Sensitivity Micropower Hall Switch 4 V3.10 Nov 1, 2013 Installation Comments Consider temperature coefficients of Hall IC and magnetics , as well as air gap and life time variations. Observe temperature limits during wave soldering. Typical IR solder-reflow profile: − No Rapid Heating and Cooling. − Recommended Preheating for max. 2minutes at 150 °C − Recommended Reflowing for max. 5seconds at 240 °C Application Informatio It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the supply (VDD Pin) and ground (GND Pin) of the device to reduce both external noise and noise gener- ated by the chopper stabilization technique. As is shown in the following two figures, a 0.1μF capacitor is typical. 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*IDD) - the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC2/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. When a weak power supply is used or when the device is intended to be used in noisy environment, it is recom- mended that the second figure 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 solu- tions provide the required reverse voltage protection. SS275 R2 10k C2 4.7n VDD GND OUT C1 100n SS275 R1:100 R2 10k C2 4.7n VDD GND OUT C1 100 Z1 D1 Automotive and Severe Environment Protection Circuit Typical Three-Wire Application Circuit |
类似零件编号 - SS275EUA |
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类似说明 - SS275EUA |
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