AH31XX Series Unipolar Hall Effect Sensor – Integrated Circuit for Position Detection

Sensors & Transmitters Nanjing AH Electronic Science &Technology Co,. Ltd. 21 Mar 2026 ( )

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These Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications and high sensitivity, designed to operate continuously over extended temperatures to +150° C, and are more stable with both temperature and supply voltage changes. The unipolar switching characteristic makes these devices ideal for use with a simple bar or rod magnet.

Each device includes a voltage regulator for operation with supply voltages of 4.5 to 24 volts, reverse battery protection diode, quadratic Hall-voltage generator, temperature compensation circuitry, small-signal amplifier, Schmitt trigger, and an open-collector output to sink up to 25 mA. with suitable output pull up, they can be used with bipolar or CMOS logic circuits.

Features

Wide Supply Voltage Range
Fast Response Time
Wide Frequency And Temperature Range
Long Operating Life
Small Size, Convenient Installing
Output Compatible with All Digital Logic families

Typical Application

Contactless Switch. Position Control
Speed Measurement. Revolution Detection
Isolation Measurement. Brushless DC Motor
Automotive Ignitor

Type	Manufacturing Techniques	Output State	Packing	Supply Curent (mA)	Load (mA)	Operating Voltage (V)	BOP (mT)	BRP (mT)	BH (mT)	Operating Temperature (oC)
AH3131	Bipolar	Open collector	SOT23/SOT89/TO92	4	25	4.5~24	3.0	1.5	1.5	-40~150
AH3132	Bipolar	Open collector	SOT23/SOT89/TO92	4	25	4.5~24	4.5	2.5	2.0	-40~150
AH3133	Bipolar	Open collector	SOT23/SOT89/TO92	4	25	4.5~24	6.0	3.0	3.0	-40~150
AH3134	Bipolar	Open collector	SOT23/SOT89/TO92	4	25	4.5~24	9.0	5.0	4.0	-40~150
AH3134R	Bipolar	10k pull-up	SOT23/SOT89/TO92	4	25	4.5~24	9.0	5.0	4.0	-40~150
AH3144	Bipolar	Open collector	SOT23/SOT89/TO92	4	25	4.5~24	15.0	10.0	5.0	-40~150
AH3145	Bipolar	Open collector	SOT23/SOT89/TO92	4	25	4.5~24	22.0	17.0	5.0	-40~150