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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.
Specifications Comparison
| Part Number | AK09974C | AK09973D | |
|---|---|---|---|
| Magnetic sensor technology | Si Hall | Si Hall | |
| Power supply (VDD) | [V] | 1.65 to 1.95 | 1.65 to 1.95 |
| I/O voltage (VIO) | [V] | 1.2 / 1.8 | 1.2 / 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] | 332 | 101 |
| Interrupt output | I3C In-Band Interrupt | Open-drain pin | |
| Max. ODR | [Hz] | 2000 | 2000 |
| Interface | I²C / I3C (v1.1.1) | I²C | |
| Package | 4-pin WLCSP | 5-pin WLCSP | |
| Package Size | [mm] | 0.76 × 0.76 × 0.50 | 1.18 × 0.78 × 0.55 |
| Internal calculation | Arctan | - | |
| Programmable threshold | Absolute, Relative | Absolute | |
| Status | Preview | MP | |
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.
Specifications Comparison
| Tri-axis Magnetic Sensors | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ultrahigh precision 3-axis Electronic Magnetometer |
Ultrahigh precision 3-axis Electronic Magnetometer |
|||||||||
| Part Number | AK09940A | AK09940 | ||||||||
| 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] | 0.35 | 0.6 | 0.9 | 1.5 | 2.8 | 0.6 | 0.9 | 1.5 | 2.8 |
| Current consumption @100Hz ODR (Low power drive) |
[μA] | 16 | 30 | 60 | 100 | 200 | 30 | 60 | 100 | 200 |
| Noise | [nT-rms] | 120 | 70 | 60 | 50 | 40 | 70 | 60 | 50 | 40 |
| Current consumption when measuring |
[mA] | 0.8 | ||||||||
| Output pin | DRDY | |||||||||
| Max. ODR | [Hz] | 2500 | 400 | |||||||
| 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 (Power Mode) [nT rms] |
Current Consumption (@100Hz ODR) [μA] |
Current Consumption when measuring [mA] |
Output pin |
Control Interface |
Max. ODR [Hz] |
Operating Temperature [℃] |
Device Package |
Number of Pins |
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AK09940A |
MP |
1.7 |
1.98 |
0.01 |
±1.2 |
0.35 / 0.6 / 0.9 / 1.5 / 2.8 |
120 / 70 / 60 / 50 / 40 |
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) |
22 (Low power drive) |
1.4 |
Interrupt pin (Open Drain) |
I²C (Two selectable Slave addresses) |
-30 to 85 |
WLCSP |
5 |