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Tri-axis Magnetic Sensors

Ultra-compact package
Tri-axis Magnetic Smart Switch for various purposes

The AK09974C and AK09973D are compact 3-axis magnetic sensors designed to be used in combination with magnets.
With a single sensor, it can detect not only basic movements such as linear motion, rotation, opening/closing, and tilting, but also complex combined motions.

AK09974C

AK09974C is a 4-pin WL-CSP with a 0.4mm ball pitch.The size is 0.76 × 0.76 × 0.50mm , with two pins for power supply and two pins for I²C / I3C communication.
Its wide measurement range, low-noise design, and built-in processing functions enable compact system designs while achieving both design flexibility and high accuracy.
It is suitable for UI (user interface) applications in various electronic devices such as smartphones, XR terminals, and healthcare devices.

AK09973D

The AK09973D is packaged in 5-pin WL-CSP with 0.4mm ball-pitch . The size is 1.18 × 0.78 × 0.55mm with 2 pins for power supply, 2 pins for I²C communication, and one Interrupt output pin.
By utilizing its magnetic threshold interrupt function and ultra-low power consumption, it is also well-suited for battery-powered security monitoring devices.

AK09974C

AK09974C

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AK09973D

AK09973D

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Specifications Comparison

Part NumberAK09974CAK09973D
Magnetic sensor technologySi HallSi Hall
Power supply (VDD)[V]1.65 to 1.951.65 to 1.95
I/O voltage (VIO)[V]1.2 / 1.81.2 / 1.8
Magnetic sensitivity
[μT/LSB]1.1 (Normal range)
6.1 (Wide range)		1.1 (High sensitivity)
3.1 (Wide range)
Measurement range
[mT]X,Y,Z: ±36 (Normal range)
X,Y: ±78, Z: ±200 (Wide range)		X,Y,Z: ±36 (High sensitivity)
X,Y: ±34.9, Z: ±101.5 (Wide range)
Noise[μTrms]Normal range mode:
X,Y: 3.1, Z: 1.4 (Super Low noise drive)
X,Y: 5.3, Z: 2.4 (Low noise drive)
X,Y: 14.8, Z: 6.8 (Normal drive)         
X,Y: 30.2, Z: 13.8 (Low power drive)		High sensitivity mode:
X,Y,Z: 5.5 (Low noise drive)
X,Y,Z: 15 (Low power drive)
Current consumption
(100Hz, Low noise drive)		[μA]332101
Interrupt output I3C In-Band InterruptOpen-drain pin
Max. ODR[Hz]20002000
Interface I²C / I3C (v1.1.1)I²C
Package 4-pin WLCSP5-pin WLCSP
Package Size[mm]0.76 × 0.76 × 0.501.18 × 0.78 × 0.55
Internal calculation Arctan-
Programmable threshold Absolute, RelativeAbsolute
Status MPMP

Ultrahigh precision 3-axis Electronic Magnetometer

AK09940A

AK09940A is a digital output ultra-compact 3-axis electronic magnetometer that uses TMR magnetic sensor elements to achieve ultra-low noise performance.
The magnetic field vector is output as an 18-bit digital value for each of the X, Y, and Z axes.
Metal flaw or metal foreign object detection, as well, it might be able to be utilized in various fields magnetic detection has not been made.

Ultrahigh precision 3-axis Electronic Magnetometer

Ultrahigh precision
3-axis Electronic Magnetometer

AK09940A
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Specifications Comparison

Tri-axis Magnetic Sensors
　Ultrahigh precision
3-axis Electronic Magnetometer		Ultrahigh precision
3-axis Electronic Magnetometer
Part NumberAK09940AAK09940
Magnetic sensor
technology		TMR
Power supply (VDD)[V]1.7 to 1.98
Magnetic sensitivity[μT/LSB]0.01
Measurement range[mT]±1.2
Measuremet time[ms]0.350.6 0.91.5 2.80.60.91.52.8
Current consumption
@100Hz ODR
(Low power drive)		[μA]1630601002003060100200
Noise[nT-rms]​12070 60504070605040
Current consumption
when measuring		[mA]0.8
Output pin DRDY
Max. ODR[Hz]2500400
Interface I²C / 4-wire SPI
Package 11-pin ULGA
Package Size[mm]1.6 × 1.6 × 0.58
Status ES: Avialable
MP: 2023/Q2		EOL

Selection Table 

Part Number
 
Part
Status
 
Power 
Supply 
Voltage 
(MIN.)
[V]
 
Power 
Supply 
Voltage 
(MAX.)
[V]
 
Magnetic 
Sensitivity
[μT/LSB]
 
Measurement 
range
[mT]
 
Measurement 
Time 
[ms]
 
Noise 
[Trms]
 
Current 
Consumption 
(@100Hz ODR)
[μA]
 
Current 
Consumption 
when 
measuring
[mA]
 
Output pin
 
Control 
Interface
 
Max. ODR
[Hz]
 
Operating
Temperature
[℃]
 
Device
Package
 
Number
of Pins
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼
▲
▼ 
AK09940A
 
MP
 
1.7
 
1.98
 
0.01
 
±1.2
 
0.35 / 0.6 / 0.9 / 1.5 / 2.8
 
120n / 70n / 60n / 50n / 40n
 
16 / 30 / 60 / 100 / 200
 
0.8
 
DRDY
 
I²C / 4-wire SPI
 
2500
 
-30 to 85
 
ULGA
 
11
 
AK09973D
 
MP
 
1.65
 
1.95
 
1.1 (High sensitivity setting)
 
X, Y, Z ±36 (High sensitivity setting)
 
0.265 (Low power drive)
 
X,Y,Z 5.5μ
(High sensitivity setting, Low noise drive)
 
22 (Low power drive)
 
1.4
 
Interrupt pin (Open Drain)
 
I²C  (Two selectable Slave addresses)
 
2000
 
-30 to 85
 
WLCSP
 
5
 
AK09974C
 
MP
 
1.65
 
1.95
 
1.1 (Normal range setting)
 
X, Y ±78, Z ±200 (Wide range setting)
 
0.658 (Normal drive)
 
X, Y 14.8μ, Z 6.8μ
(Normal range setting, Normal drive)
 
75 (Normal drive)
 
1.4
 

                                		
                            
                        
                            
                            
                                
                                    
I3C (v1.1.1) / I²C

                                		
                            
                        
                            
                            
                                
                                    
2000

                                		
                            
                        
                            
                            
                                
                                    
-30 to 85

                                		
                            
                        
                            
                            
                                
                                    
WLCSP

                                		
                            
                        
                            
                            
                                
                                    
4