SHENZHENSHI YUHUIMEI TECHNOLOGY CO.,LTD
Low Power Hall Switch
YH13s Low Power Hall Switch
Description
The YH13s omnipolar Hall effect sensor IC is fabricated from mixed signal
CMOS technology. It incorporates advanced chopper-stabilization techniques to
provide accurate and stable magnetic switch points.
The circuit design provides an internally controlled clocking mechanism to
cycle power to the Hall element and analog signal processing circuits. This serves
to place the high current-consuming portions of the circuit into a Sleep” mode.
Periodically the device is Awakened” by this internal logic and the magnetic flux
from the Hall element is evaluated against the predefined thresholds. If the
flux density is above or below the Bop/Brp thresholds then the output transistor is
driven to change states accordingly. While in the Sleep” cycle the output transistor
is latched in its previous state. The design has been optimized for service in
applications requiring extended operating lifetime in battery powered systems.
The output transistor of the YH13s will be latched on in the presence of a
sufficiently strong South or North magnetic field facing the marked side of the
package. The output will be latched off in the absence of a magnetic field.
Features
2.2 V to 6.0 V battery operation
High sensitivity and high stability of the magnetic switching points
High resistance to mechanical stress
Digital output signal
Switching for both poles of a magnet (omnipolar)
Pin Definitions and Functions
Pin Symbol Function
1 V
S Supply Voltage
2 Q Open Drain Output
3 GND Ground
Mark :
13 s —— YH13s
y m——year, month
CMOS High Sensitivity Micropower YHM148 Hall Switch Installation Comments Consider temperature coefficients of Hall IC and magnetic, as well as air gap and life time variations. Observe temperature limits during wave soldering. Typical Application Eastera's pole-independent sensing technique allows for operation with either a north pole or south pole magnet orientation, enhancing the manufacturability of the device. The state-of-the-art technology provides the same output polarity for either pole face. It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization technique. This is especially true due to the relatively high impedance of battery supplies.