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)

ated by the chopper stabilization technique. As is shown in the following

two figures, a 0.1μF capacitor is typical.

using a resistor, three points are important:

≤ 50mA)

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-

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