Micropower, High Sensitivity Omnipolar Hall Switch

AS164

The AS164 is an ultra-sensitive Hall-effect switch with digital output, mainly designed for battery-operation, hand-held equipment.

Special CMOS process is used for low-voltage and low-power requirement. A chopper stabilized amplifier improves stability of magnetic switch points. A sleep-awake logic controls the device in sleep time or awake time. This function will reduce the average operation current of the device. During the awake time, the output is changed with the magnetic flux density. During the sleep time, the output is latched in its previous state and the current consumption will reduce to some uA. The device switching behavior is omnipolar, either north or south pole sufficient strength will turn the output on. If the magnetic flux density is large than operating point (Bop), the output will be turned on; if it is less than releasing point (Brp), the output will be turned off.

The AS164 is available in SIP-3L, SOT23-3L packages.

Features

 Micropower Operation

 Operating Voltage Range: 2.5V~5.5V

 Magnetic Sensitivity: |Bop|=16G, |Brp|=10G(Typ.)

 Operating Temperature Range: -40°C ~ 85°C

 Stabilized Chopper

 Superior Temperature Stability

 Built-in Push-Pull Output Stage

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