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.
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 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 2: Connection of Pulled-up Resisitor RL] |
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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 4: Pulse excitation electric current consumption (example for EM-1671)] |
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| [Figure 5: Operation timing diagram] |
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