The AKM angle sensor is composed of hall elements with integrated circuit in single die.  This sensor enables the measurement of magnetic fields in parallel to the chip surface and can detect the absolute angle of a magnetic field over the full range between 0 and 360 degrees with high angular accuracy and resolution.
This sensor is non-contact angle sensor which is suitable for consumer, industrial and automotive application, the simple composition which consists of small magnet and this sensor can be used.



Angle Sensors

14-bit angular error calibratable rotary angle sensor

The AK7452 integrates an advanced user calibration function, enabling it to correct angular errors caused by mounting misalignment, magnet characteristics, etc.  In addition, supported are Shaft-end detection and detection on an orthogonal side of the shaft (Off-Axis).
The capability of ABZ phase output resolution any setting from 1 to 4096 types enhances motor control usability even in DC brushless motors or stepping motors.

● Supporting programmable ABZ/UVW output

A zero point setting can set any angular position to 0 degree.  Rotation direction, resolution of ABZ output, (1 to 4096), and number of pulses of UVW output (1 to 32), can be programmed to the internal EEPROM.


ABZ/UVW phase adjustable rotary angle sensor

The AK7451 is able to output up to eight-pole UVW phase that improves versatility, realizing rotor position detection in DC brushless motor-driven operation without Hall ICs installation.  The expansion of ABZ phase output resolution setting from 4 to 16 types enhances motor control usability.  These key features enable to use for more various types of industrial equipment motors than conventional products.
● Easy installation of a contactless rotary sensor with diametrically magnetized mono-pole magnets
● Supporting High-speed rotational operation
● Programmable ABZ/UVW phase output


12-bit rotary angle sensor
AK7401, AK7405

The automotive qualified AK740X product family comprises the 12-bit angle sensor AK7401 with serial/PWM interface as well as the high speed 12-bit angle sensor AK7405 with serial / ABZ interface.  AK7401 is suitable for the rotational position sensing application, for example steering angle measurement, valve position sensing and so on.  AK7405 is suitable for high rotational application just as motor control.

Selection Table

Part# Data
Description-Digest Oper.
Package I/F Power
Angle Error

V bit
AK7401Yes12bit Rotary Angle Sensor-40 to 1508-SOPSerial, PWM4.0 to 5.512
AK7405YesHigh Speed 12bit Rotary Angle Sensor-40 to 15020-SSOPSerial, ABZ4.5 to 5.512
AK7451ABZ/UVW phase adjustable 12bit Rotary Angle Sensor -40 to 12516-SOPSerial, ABZ, UVW4.5 to 5.512
High accuracy absolute Magnetic Rotary Angle Sensor -40 to 12516-TSSOPSerial, ABZ, UVW3.0 to 5.514Available
EM324210bit Angle Sensor-30 to 856-SOPAnalog2.7 to 3.310

 ■ Design of magnet for angle sensors

 ■ Effect of magnet desplacement


■ Automotive
Wiper motor control, Headlamp position control, Seat position motor, Side mirror control

■ Consumer
Compact absolute rotary encoder, Compact input device (mode selector, control volume)
Substitute for potentiometer, Rotary switch

 ■ Automotive

         Pedal position sensor, Steering angle sensor, Valve position  

         Sensor,Headlamp position control, seat position motor, Side    

         mirror , Electric power steering  , Fuel level sensor , Main / 

         Sub motor control

 ■ Consumer

     Compact absolute rotary encoder ,Compact input device (mode selector, control volume) 
     Substitute for potentiometer
     Rotary switch

Under construction

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