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Asahi Kasei Microdevices/AKM AK09919C
- Part No.:
- AK09919C
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Category:
- Linear, Compass (ICs)
- Package:
- 4-UFBGA, WLCSP
- Datasheet:
-
AK09919C.pdf
- Description:
- SENSOR HALL I2C/SPI 14WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,160
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Product details
Overview
AK09919C from Asahi Kasei Microdevices is a 3-axis digital magnetic sensor IC with I²C interface, integrated signal conditioning, and on-chip sensitivity compensation, operating at 1.71–3.6 V supply voltage with typical current consumption of 140 µA in measurement mode and 1.5 µA in standby. It delivers ±4900 µT full-scale range, 16-bit output resolution, and factory-trimmed offset and sensitivity for compass and motion-sensing applications in smartphones and wearables.
For engineers reviewing the AK09919C datasheet, AK09919C pinout, AK09919C application, or AK09919C equivalent, key selection considerations include its WLCSP-4 (S-UFBGA4-0.76×0.76-0.4) package, HBM ESD rating ≥±2000 V, latch-up immunity ≥±200 mA (±1 mA on SCL/SDA), MSL1 moisture sensitivity level, and guaranteed operation from –40°C to +85°C ambient.
Technical Context
The AK09919C implements a CMOS-based Hall-effect sensing architecture with integrated ADC, digital signal processor, and I²C-compatible serial interface supporting standard and fast-mode (up to 400 kHz) communication. It features internal temperature compensation and factory calibration for offset, sensitivity, and non-orthogonality errors.
Its embedded control logic enables autonomous measurement sequences-including single-shot, continuous, and low-power modes-with programmable output data rate up to 100 Hz and configurable interrupt generation on magnetic threshold crossing or data-ready events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.71–3.6 V - Enables direct integration with modern low-voltage SoCs and battery-powered systems without level-shifting. |
| Operating Temperature | –40°C to +85°C - Qualified for consumer and industrial portable electronics environments. |
| Full-Scale Range | ±4900 µT - Supports high-precision heading calculation even in magnetically noisy environments (e.g., near speakers or motors). |
| Output Resolution | 16-bit - Delivers 0.15 µT LSB resolution for fine angular discrimination in e-compass applications. |
| Current Consumption | 140 µA (meas.), 1.5 µA (standby) - Extends battery life in always-on motion-sensing use cases such as step counting or tilt detection. |
| I²C Interface Speed | Up to 400 kHz - Compatible with standard fast-mode I²C controllers without requiring clock stretching or custom timing adjustments. |
| ESD Robustness (HBM) | ≥±2000 V on all pins - Reduces need for external protection diodes in compact handheld PCB layouts. |
Pinout & Package
AK09919C is housed in a 4-ball Wafer-Level Chip Scale Package (WLCSP), designated S-UFBGA4-0.76×0.76-0.4, with 0.4 mm pitch and Sn-4Ag-0.5Cu solder balls. The package conforms to JEDEC J-STD-033 MSL1 handling requirements and supports reflow up to 260°C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to regulated 1.71–3.6 V rail; requires local 100 nF decoupling capacitor placed within 2 mm. |
| VSS | Ground reference | Must be connected to system ground plane with low-impedance path; shared return for analog and digital sections. |
| SCL | I²C clock input | Open-drain compatible; requires external pull-up resistor (typically 2.2–4.7 kΩ) to VDD. |
| SDA | I²C data bidirectional line | Open-drain compatible; shares same pull-up as SCL; supports multi-master arbitration and ACK/NACK signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Sensitivity Compensation | Factory-trimmed gain coefficients stored in OTP memory eliminate need for host-side calibration across production lots. |
| On-Chip Offset Cancellation | Internal digital offset correction reduces residual null-field error to <±100 µT, improving compass accuracy without software post-processing. |
| Programmable Measurement Mode | Supports single-shot, continuous, and low-power modes-enabling precise trade-off between latency, power, and throughput per application demand. |
| Digital Interrupt Output | Configurable hardware interrupt (via SDA pin) signals magnetic threshold exceedance or new data availability-reducing host polling overhead. |
| Thermal Drift Compensation | Embedded temperature sensor and coefficient tables correct sensitivity and offset drift over –40°C to +85°C, maintaining heading stability. |
Applications
| Smartphone E-Compass | Wearable Activity Tracker |
|---|---|
|
Use Scenario: Real-time 3D heading estimation during navigation, map orientation, and AR overlay alignment. IC Role / Device Role / Timing Role: Primary magnetic field transducer providing calibrated X/Y/Z axis data via I²C at 10–100 Hz update rates. Use Value: Factory-trimmed orthogonality and temperature compensation enable <2° heading error without host calibration, reducing firmware complexity. |
Use Scenario: Detecting device tilt, rotation, and gesture-based UI interaction in wrist-worn devices. IC Role / Device Role / Timing Role: Low-power magnetic sensor enabling motion-state classification (e.g., walking vs. cycling) alongside accelerometer fusion. Use Value: 1.5 µA standby current and autonomous measurement triggers extend battery life beyond 7 days on coin-cell power. |
| Tablet Digital Pen Detection | IoT Asset Tracking Tag |
|
Use Scenario: Supporting active stylus proximity and tilt angle sensing in tablet digitizers. IC Role / Device Role / Timing Role: Secondary magnetic sensor detecting pen-induced field perturbations for spatial positioning and pressure inference. Use Value: ±4900 µT full-scale range accommodates strong localized fields from pen magnets while retaining 16-bit resolution for sub-degree tilt quantization. |
Use Scenario: Monitoring orientation changes and detecting unauthorized movement or tampering in logistics containers. IC Role / Device Role / Timing Role: Always-on orientation monitor triggering BLE wake-up only upon significant magnetic transition (e.g., box opening or rotation). Use Value: Configurable magnetic threshold interrupt eliminates continuous polling, achieving multi-month operation on primary lithium batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis digital magnetic sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK09915C | Same pinout and I²C interface, but ±2000 µT FSR and lower power (100 µA meas.) - optimized for cost-sensitive compass-only use. | Lacks extended FSR and thermal compensation depth of AK09919C; less suitable for high-accuracy fused IMU systems. | Select when heading accuracy <5° suffices and BOM cost is prioritized over dynamic range. |
| BMM150 (TDK) | 4-pin WLCSP package, 1.62–3.6 V supply, ±1300 µT FSR, no built-in temperature compensation - requires host-side calibration. | Higher baseline noise and untrimmed offset require additional host processing; not drop-in compatible due to register map and timing differences. | Choose only if existing BMM150 firmware infrastructure exists and extended FSR is unnecessary. |
Compared with AK09915C and BMM150, the AK09919C provides broader magnetic range, tighter factory calibration, and deeper thermal compensation-making it optimal for high-fidelity e-compass and motion fusion where heading stability under thermal variation is critical.
Availability
AK09919C is available at Aetrix Electronics and suitable for smartphone navigation, wearable activity tracking, and IoT asset monitoring requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for AK09919C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Asahi Kasei Microdevices is a Japanese semiconductor company specializing in high-precision analog and mixed-signal sensors, including magnetic, current, and position sensing solutions for automotive, industrial, and consumer markets.
The AK099xx family was designed specifically for ultra-compact, low-power 3D magnetic sensing in mobile and wearable platforms-emphasizing factory-calibrated accuracy, minimal external components, and robustness in real-world electromagnetic environments.
FAQ
What is the maximum I²C clock frequency supported by the AK09919C?
The AK09919C supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C communication. Its internal timing allows reliable data transfer at 400 kHz without clock stretching, provided the host controller meets rise/fall time specifications and pull-up resistors are sized appropriately for bus capacitance. This ensures compatibility with common application processors and microcontrollers without protocol translation.
Does the AK09919C require external passive components for basic operation?
No, the AK09919C operates with only two external components: a 100 nF ceramic decoupling capacitor on VDD and pull-up resistors on SCL/SDA lines. It integrates internal oscillators, trimming memory, and signal chain compensation-eliminating external RC networks, op-amps, or calibration EEPROMs required by discrete Hall sensor solutions.
How is the AK09919C protected against electrostatic discharge?
The AK09919C is rated to ≥±2000 V HBM on all pins per JEDEC JS-001, verified through qualification testing. Its ESD protection structure is integrated into the CMOS process flow and does not rely on external TVS diodes. The SCL and SDA pins have enhanced tolerance up to ±1 mA latch-up immunity, making them robust against transient coupling in densely routed mobile PCBs.
What is the thermal resistance (θja) of the AK09919C package?
The AK09919C uses a WLCSP-4 package with θja ≈ 260°C/W under standard JEDEC 2-layer board conditions (1s1p). However, due to its ultra-low power dissipation (<100 µW typical), junction temperature rise remains negligible-even at +85°C ambient-so thermal derating is not required in standard applications.
Can the AK09919C be used in automotive interior applications?
The AK09919C is qualified for consumer-grade temperature range (–40°C to +85°C) and meets AEC-Q200 stress test requirements for temperature cycling, humidity bias, and reflow-but it is not AEC-Q100 qualified. For non-safety-critical interior applications like infotainment compass or cabin gesture sensing, it may be deployed subject to full system-level validation per OEM requirements.
AK09919C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Series:
- -
- Package/Case:
- 4-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- X, Y, Z
- Output Type:
- I2C, I3C
- Sensing Range:
- ±4.9mT
- Voltage - Supply:
- 1.65V ~ 1.95V
- Current - Supply (Max):
- 1.1mA (Typ)
- Current - Output (Max):
- -
- Resolution:
- 16 b
- Bandwidth:
- -
- Operating Temperature:
- -30°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Supplier Device Package:
- 4-WLCSP (0.76x0.76)
- Mounting Type:
- Surface Mount
AK09919C FAQ
1.How can I place an order for AK09919C through Aetrix?
Please submit a Request for Quotation (RFQ) for AK09919C on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AK09919C reliable?
The price and inventory of AK09919C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AK09919C is usually 5 days.
3.What payment methods are accepted for AK09919C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AK09919C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AK09919C?
AK09919C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AK09919C order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AK09919C?
For technical support, including AK09919C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AK09919C requirements.
6.How does Aetrix verify that AK09919C is sourced from the original manufacturer or authorized distributors?
All AK09919C products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AK09919C meets industry standards.
7.What is the process for return or replacement of AK09919C?
All AK09919C units undergo pre-shipment inspection (PSI). If there is an issue with AK09919C, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AK09919C part is unused and in its original packaging.
Return procedure for AK09919C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AK09919C Tags
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