A1102EUA-T

Series:	--
Packaging:	Bulk
Part Status:	Active
Function:	Unipolar Switch
Technology:	Hall Effect
Polarization:	South Pole
Sensing Range:	24.5mT Trip, 6mT Release
Test Condition:	-40°C ~ 85°C
Voltage - Supply:	3.8 V ~ 24 V
Current - Supply (Max):	7.5mA
Current - Output (Max):	25mA
Output Type:	Open Drain
Features:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	3-SSIP
Supplier Device Package:	3-SIP

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Magnetic Sensors - Switches (Solid State)A1102EUA-T is a programmable Hall-effect switch, designed for electronic commutation of brushless permanent magnet motors. It is based on Allegro MicroSystems\' advanced CMOS Hall-effect technology. The part measures the output of a rotating magnetic field and provides a proportional open-collector output. This output is inversely proportional to the field, giving a switch output as the magnetic field passes north to south and south to north.A1102EUA-T application fieldA1102EUA-T has a detection range that covers angular movement up to 360°. This makes it an ideal solution for motor commutation applications. It is optimized for applications with medium speed and medium airgap of up to 0.7 mm. It also has an extremely low-power quiescent current in shutdown mode.A1102EUA-T is the best choice for automotive and industrial systems that require low RDS(on) for high efficiency and reliability. It can also be used in various automotive applications, such as windshield wiper control, headlights control, fuel pump control, motor control, automotive pumps and fans, and power steering systems, among others.The device has an operating temperature range of -40 to +125°C, making it suitable for use in harsh environments. It also has a wide supply voltage range, from 2.7 to 16 V, and can work with supply voltages up to +18 V in linear operation.A1102EUA-T working principleA1102EUA-T uses a Hall-effect magnetic sensor to measure the magnetic field in order to generate a precise output signal. The output signal can be adjusted by adjusting the magnitude and direction of the magnetic field.When the sensitivity set requires the magnetic field to go through north to south or south to north transition, the switch output triggers. This transition triggers the open-collector output pins, one for high flux density, and one for low flux density.The device has programmable features to improve the accuracy and precision of the sensing, such as a “field strengthener” system for maximum magnetic field detection, a “field pre-amplifier” system for low-contrast magnetic fields, and an auto shutdown mode.It also comes with an integrated window comparator, which allows the user to adjust the magnetic field threshold level for applications that require such capability. The window comparator can further reduce false triggering and power consumption.ConclusionA1102EUA-T is a programmable Hall-effect switch designed for electronic commutation of brushless permanent magnet motors. It uses a Hall-effect magnetic sensor to measure the magnetic field in order to generate a precise output signal. It has an operating temperature range of -40 to +125°C, and a wide supply voltage range from 2.7 to 16 V. Its features and design make it suitable for use in automotive and industrial applications, such as motor control, automotive pumps and fans, and power steering systems.

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