Details, datasheet, quote on part number: AK7451
PartAK7451
Category
TitleIC MAGNETIC ROTATE SENSOR 16SOP
Description

AKM Semiconductor's AK7451 is a 12-bit magnetic rotational angle sensor which detects the angular position of a magnetic field parallel to the IC surface with high speed tracking (up to 20,000 rpm). The contactless angle sensor can be made by the simple construction of a small magnet and this sensor. This magnetic rotary angle sensor detects rotation speed and rotation angles by measuring the intensity of a magnetic field with the combination of magnets parallel to the IC. The AK7451 is able to output up to eight-pole UVW phases that improve versatility, realizing rotor position detection in DC brushless motor-driven operation without Hall ICs installation. The expansion of the ABZ phase output resolution setting from four types to 16 types enhances motor control usability. These key features enable the sensor to be used for more varied types of industrial equipment motors than conventional products. Because of the magnetic field detection method, the sensor is tolerant of dust and oil spots compared with an optical detection method type encoder. The AK7451 is housed in a small 16-pin SOP package. It is suitable to various motor drive applications and encoder applications.



CompanyAKM Semiconductor, Inc.
DatasheetDownload AK7451 datasheet
  

 

Features, Applications

The is a magnetic rotational angle sensor of Si monolithic with a built-in Hall element, and easily achieve a non-contact rotation angle sensor in combination with diametrically magnetized two pole magnet. By detecting the magnetic field parallel vector to the IC package surface, the AK7451 outputs the absolute angular position of the magnet, and the relative angular position. By transverse magnetic field detection method using a magnetic flux concentrator, the AK7451 has excellent axial misalignment immunity. AK7451 is the Zero Latency rotation angle sensor to follow to 20,000rpm with the architecture of the tracking servo system, it is suitable to various motor drive applications and an encoder applications.

Monolithic integrated 360 degrees angle sensor IC containing Hall element. Easy to make a contactless rotation sensor with diametrically magnetized two pole magnet. Interfaces : SPI(absolute angle), ABZ phase output (incremental Interface), UVW phase output 12bit angle resolution Less than 0.6 deg. angle accuracy 25 C Maximum tracking speed : 333 rps (20,000 rpm) Angle output delay time: 1.8s Operating ambient temperature: to 125C Various abnormal detection; abnormal magnetic flux density range etc. Various setting functions; angle zero point, rotation direction, ABZ resolution/hysteresis etc.

1. General Description............................................................................................................................ 1 2. Features.............................................................................................................................................. 1 3. Table of Contents................................................................................................................................ 2 4. Block Diagram and Functions............................................................................................................. 3 5. Pin Configurations and Functions....................................................................................................... 5 6. Absolute Maximum Ratings................................................................................................................ 6 7. Recommended Operating Conditions................................................................................................. 6 8. EEPROM Characteristics.................................................................................................................... 6 9. Electrical and Magnetic Characteristics.............................................................................................. 7 10. Serial Interface Characteristics........................................................................................................... 8 11. Digital Output Characteristics........................................................................................................... Instructions.........................................................................................................................................11 13. Mode Transition Diagram and Conditions........................................................................................ 12 14. Serial Interface.................................................................................................................................. 13 15. Register / EEPROM Address Map / Configration.......................................................................... 15 16. ABZ Output Figure............................................................................................................................ 26 17. UVW Output Figure........................................................................................................................... 27 18. Abnormal Detection Functions.......................................................................................................... 28 19. Angle Zero Position at Shipment, and Relation between Magnet Angle Position and Output...... 29 20. Package Information......................................................................................................................... 30 20.1. Outline Dimensions..................................................................................................................... 30 20.2. Marking................................................................................................................................... 31 Important Notice....................................................................................................................................... 32

ATPGE ESD POR REGULATE _ANA ARVDD V HE_X X_ CHOP PRA_ HE_Y Y_ CHOP SWAP PRA_Y PRA_ SWAP ADC_Y V Vx PRA_X ADC _X Type2 Tracking Loop ENCODER LOGIC REGULATE _DIG DRVDD V Fault Detector DMODE TESTA D6 ERROR CS SCLK MOSI MISO


 

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