HOME

Products

Technology

Sales Representatives

About us

Contact

Products

HOME > Products > Hall effect IC > Principle of operation of Hall effect IC

products

Principle of operation of Hall effect IC
Circuit structure of Hall Effect IC
The Hall effect IC consists of Hall element and signal conditioning circuitry to convert the Hall element output into a digital output. The two devices are mounted in a single package with three active terminals(Power, GND and output).There are two choices of power consumption. Continuous powered devices with standard current consumption and pulsed powered devices at low duty cycles that significantly reduce the average current consumption to microamps.

Continuous excitation type

Two types of output circuit are available: open collector type and an internal pull-up resistor type. The open collector type Hall effect IC is generally used to connect an external resistor RL as shown in Figure 2.
The normal operating temperature for this type is -30°C to 115°C.

[Figure 1: Circuit composition of Hall effect IC]
Figure 1: Circuit composition of Hall effect IC
[Figure 2: Connection of Pulled-up Resisitor RL]
Figure 2: Connection of Pulled-up Resisitor RL

Pulse excitation type (Micro Power)

The Hall element is driven by the electric current pulse shown in Figure 4, and the output is as shown in Figure 5. As for output when it is not driven, the immediately preceding state is maintained. Usually, the period of the pulse drive is predetermined in each grade of Hall effect IC and cannot be externally controlled. The normal operating temperature range for this type is -30°C to 85°C.

[Figure 3: Circuit composition]
Figure 3: Circuit composition
[Figure 4: Pulse excitation electric current consumption (example for EM-1671)]
Figure 4: Pulse excitation electric current consumption (example for EM-1671)

[Figure 5: Operation timing diagram]
Figure 5: Operation timing diagram
Figure 5: Operation timing diagram

Operation of Hall effect IC
[Operation of Unipolar Hall Effect Switch]
Operation of Unipolar Hall Effect Switch
[Output waveform of Unipolar Hall effect Switch]
Output waveform of Unipolar Hall effect Switch
Unipolar Hall Effect Switch

On/off is switched depending on the intensity of the magnetic field of the S-pole of the magnet.
This type is primarily used for position detection of a magnet.


[Operation of Omnipolar Hall Effect Switch]
Operation of Omnipolar Hall Effect Switch
[Output waveform of Omnipolar Hall Effect Switch]
Output waveform of Omnipolar Hall Effect Switch
Omnipolar Hall Effect Switch

On/off is switched depending on the intensity of the magnetic field in S-pole or N-pole of the magnet. This type is primarily used for position detection of a magnet.(It is not dependent on the direction of the magnetic pole.)


[Operation of Bipolar Hall Effect Latch]
Operation of Bipolar Hall Effect Latch
[Output waveform of Bipolar Hall Effect Latch]
Output waveform of Bipolar Hall Effect Latch
Bioplar Hall Effect Latch

On/off is switched when the magnetic fields at the N-pole and the S-pole are applied alternately.
This type is primarily used to detect revolution speed.