AK7401 Datasheet, PDF (1/29 Pages) Asahi Kasei Microsystems – Rotary Position Sensor IC

[AK7401]
AK7401
Rotary Position Sensor IC
1. General Description
The AK7401 is a monolithic Hall-Effect sensor IC that specializes in detecting rotation angle. A
contactless rotary position sensor is easily designed with a magnet.
The AK7401 is only sensitive to the magnetic flux density applied parallel to the IC surface. This is
obtained through a magnetic concentrator which is mounted on the Hall-Effect elements. It is
advantageous to accurate angular measurements against mechanical displacement.
To detect the rotation angle of a magnet, the AK7401 provides a 12-bit angle data. The angle data output
is available via PWM and serial data protocols.
2. Applications
Steering wheel position sensor, Pedal position sensor, Throttle position sensor, EGR valve position
sensor, Turbo valve position sensor, Motor shaft position sensor
3. Features
□ 360° Contactless Angle Sensor
□ Angle Resolution : 12bit
□ Angle Linearity Error: ±0.95°@25°C
□ Over Voltage Protection: +16V @VDD pin
□ Reverse Voltage Protection: -16V @VDD, VSS pin
□ Automotive Temperature Range: -40°C to +150°C
□ AEC-Q100 Compliant
□ Output Interface: 3-wire SPI / PWM Push-Pull / PWM NMOS Open-Drain
□ User Programmable
□ Zero degree point
□ Magnet rotation direction: CCW or CW
□ Angle data average: OFF, SPC (2 times average), HP (8 times average)
□ PWM frequency: 250, 500 and 1000Hz
□ PWM polarity
□ OUT pin output type: Push-Pull / NMOS Open-Drain
□ Self-diagnostic Functions
□ Mismatch detect function for triple-redundant EEPROM data
□ Under and over supply voltage detect function
□ Under and over magnetic flux density detect function
□ Environmental Friendly (RoHS Compliant)
□ Lead free
□ Halogen free
014002685-E-01
-1-
2015/07