SS559

Hall Latch - High Sensitivity

5

V3.10

Nov 1, 2013

magnetic fields with equivalent strength and opposite direction drive the output high and low.

The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be latched on in the pres-

ence of a sufficiently strong North pole magnetic field applied to the marked face.

Application Information

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 first

figure, 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. Both

solutions provide the required reverse voltage protection.

When a weak power supply is used or when the device is intended to be used in noisy environment, it is recom-

mended the following 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-

SS559

R2

C2

VDD

GND

OUT

C1

SS559

R1:100

R2

C2

VDD

GND

OUT

C1

Z1

D1

Automotive and Severe

EnvironmentProtection Circuit

Typical Three-Wire Application Circuit