Onechip Encoders

Onechip Encoder AK877x series

The Onechip Encoder is a 2-in-1 type Hall IC which is specially designed for magnetic type rotary/linear incremental pulse encoders. It's unique detection principle - operating both on the vertical and horizontal magnetic fields - enables not only a single chip solution but 'pitch free' and 'lay-out free' encoder design.

Demonstration Video

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AK8775/AK8776
Low current consumption type one chip encoder

AK8775 and AK8776 are low current consumption type products for mobile and consumer applications.

Product Name AK8775
Low current consumption type one chip encoder
AK8776
Low current consumption type one chip encoder
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AK8777B/AK8778B/AK8779A/AK8779B
High response speed type one chip encoder

AK8777B, AK8778B, AK8779A and AK8779B are high response speed type products for consumer, industrial and automotive applications.

Product Name AK8777B
High response speed type one chip encoder
AK8778B
High response speed type one chip encoder
AK8779A
High response speed type one chip encoder
AK8779B
High response speed type one chip encoder
Sales Start Available Now Available Now
Available Now
Available Now
Samples
Distributors / Representatives
Global WEB Distributor
Digi-Key
Global WEB Distributor
Digi-Key
Part# Data
Sheet
Auto-
motive
qualified
Power
Supply
Current
Comsumption
Oper.
Temp.
Output
refresh
period
Sensitivity
(Bop,Brp)
Output
signal
Output
Stage
Package



V mA us mT
 
   
AK87751.6 to 5.50.09-30 to 8510001.5A/B phaseCMOS4-SOP
AK87761.6 to 5.50.09-30 to 8510001.5Speed & DirCMOS4-SOP
AK8777BYes4.0 to 243-40 to 12516.61.7A/B phaseOpen DrainSOT23-6W
AK8778BYes4.0 to 243-40 to 12516.61.7Speed & DirOpen DrainSOT23-6W
AK8779A
Yes3.8 to 243.5-40 to 1508.32.0Speed & DirOpen DrainSOT23-6W
AK8779B
Yes3.8 to 243.5-40 to 1508.32.0A/B phaseOpen DrainSOT23-6W

Operating Principle

NOTE) Please see application note for detailed technical information.

Onechip Encoders is the Hall effect latch which detect both “(1) vertical” and “(2) horizontal” (perpendicular and parallel to the marking side of the package) magnetic field.

*This figure shows the direction for AK8779A/B. For other parts, please refer the datasheets.

As the multipole magnetic ring rotates, the vector of the magnetic flux around the magnetic ring also rotates. The vertical component and horizontal component forms 90 degree of phase difference which depend on the direction of the rotation, regardless to the magnetic pole pitch.



'Pitch-Free'
Fits with any pitches of magnets

AK877x series can output the correct signal regardless of the magnetic pitch.
This feature can reduce the time and cost to re-design the board layout due to the change of encoder specification.



'Lay-out Free'
Enables mounting position flexibility

Compared with conventional Hall ICs, there are less restrictions for mounting position. This feature enables the various mounting strategy.
The figure below shows the examples of magnet and sensor position with AK8779A/B.

Body components for Automotive

Magnetic encoders using our onechip encoder products are most applicable for rotation detection of actuator motors in automotive body components, because these encoders have good reliability and long lifetime.

- Anti-Pinch Detection of Window Lifters/Sunroofs/Power Slide Doors/etc.
- Power Seat Motors
- Car Navigation Displays, etc.

Input devices

Onechip encoder products can realize downsized, dust-proof input devices. Their contactless detecting pronciple can also make it easy to design a water-proof structure.

- Control Knobs for Audio Products, Air Conditioners, etc.
- Steering Switches
- Jog Dials/Crowns for Portable Devices, etc

Others

Onechip Encoders can be used in many other applications which require speed/rotation detection.

- Electric Garage Doors
- Motorized Window Blinds/Curtain
- Flow Meters

Angle Sensors

High Accuracy and High Speed Angle Sensor based on AKM's Original Architecture

Hall Effect ICs

Hall Element and Signal Circuit are integrated into One Package. Suitable for Position and Rotation Detections

Semiconductor Magnetoresistive Elements

Excellently High Resolution Sensor for Gear Rotation Detection based on AKM's Compound Semiconductor Technologies

Linear Hall Effect ICs

Hall Element and Amplitude Circuit are integrated into One Package. Suitable for Position, Rotation and Current Detections

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