Overview
The AK8975C is a 3-axis electronic compass IC developed by Asahi Kasei Microdevices (AKM). As a successor to earlier AKM compass solutions, it offers improved accuracy and reduced power consumption for portable devices. The chip integrates magnetoresistive sensors and signal conditioning circuitry in a compact LGA package. Primarily used in consumer electronics, the AK8975C enables compass functionality in smartphones, tablets, and wearables. Its small form factor (3×3×1mm) makes it suitable for space-constrained designs while maintaining measurement precision of ±2° in heading accuracy under optimal conditions.
Structure and Working Principle
The AK8975C contains three Hall-effect sensors arranged orthogonally to detect magnetic fields along the X, Y, and Z axes. These sensors convert magnetic flux density into electrical signals, which are then processed by an on-chip ADC and digital signal processor. The IC operates on a standard I2C interface (up to 400kHz) for communication with host processors. It includes built-in self-test functions and temperature compensation algorithms to maintain accuracy across operating conditions (-40°C to +85°C). Power consumption is typically 1.8mA in active measurement mode, dropping to microampere levels in standby.
Key Features
Key advantages of the AK8975C include its high sensitivity (0.3μT/LSB) and wide measurement range (±1200μT). The device supports 13-bit resolution for precise heading calculations and features automatic sensitivity adjustment to compensate for environmental magnetic variations. Notably, the IC incorporates AKM's proprietary flipping current technology, which eliminates offset drift—a common challenge in magnetic sensors. This ensures stable performance over time without requiring frequent recalibration. The chip also includes interrupt functions to minimize host processor load during orientation detection tasks.
Application Areas
Beyond consumer electronics, the AK8975C finds use in industrial applications including robotics (for position feedback), UAVs/drones (flight stabilization), and automotive navigation systems. Its reliability in dynamic environments makes it suitable for IoT devices requiring orientation awareness. In augmented reality systems, the compass works with accelerometers and gyroscopes to enable precise device tracking. Some medical equipment manufacturers also integrate the sensor for instrument orientation detection. The chip's low EMI characteristics allow deployment in sensitive electronic environments.
Maintenance and Precautions
Proper handling of the AK8975C requires attention to magnetic interference. During PCB assembly, keep the sensor away from strong magnetic sources such as power inductors or speakers. The recommended clearance is at least 5cm from potential interference sources. Calibration should be performed after device assembly and periodically during operation if accuracy drifts. The calibration process typically involves rotating the device through multiple axes to map environmental magnetic distortions. Avoid exposing the sensor to mechanical shocks exceeding 10,000G, as this may affect measurement accuracy.
B2B Procurement Guide
When sourcing AK8975C chips, verify suppliers through AKM's authorized distribution network to avoid counterfeit components. Minimum order quantities typically start at 1,000 pieces, with price breaks at 10k and 50k units. Lead times vary by season but generally range from 8-12 weeks for standard orders. Consider alternative part numbers like AK09911C for newer designs requiring higher performance. For prototype quantities, many distributors offer sample kits with evaluation boards. Always request recent manufacturing date codes to ensure fresh stock.
Related Manufacturers
- 主营：集成电路
- 主营：电子元器件、集成电路、电容电阻、电感磁珠、单片机、芯片
- 主营：rt9505gqw、pesd1lvds、max392ese、rtc64613a、mic5158ym、mc34084dw、uc2845ad8、sgc-4563z、cs8414-cs、hmc435ms8、lcp1521sr、nuc950adn、max121cpe、max765csa、max303epe、lmv612max、ax88796lf、aoz1360ai、lt3748ems、mb89255bh、rt8279gsp、sg5841jsz、lt1964edd、lt6221is8、el7516iyz
- 主营：集成电路、电子元器件、传感器
- 主营：ad8619arz、锂电池、放大器、定时器、片电容、lm317mdtx、逆变器、稳压器、调制器、ldo稳压、丝印aaz、控制器、dmn601k-7、无线电、led驱动、万代aos、充电器、低功耗、三极管、收发器、处理器、计时器、存储器、隔离器、ao4619aos
- 主营：集成电路、FPGA可编程门阵列、嵌入式处理器和控制器、NAND闪存 内存、无线射频器、电源IC
- 主营：hy602468e、hr851140a、xhf-143m+、edc21-24+、hr981121c、hmc582lp5、bpf-c650+、hr981199c、adc-6-13+、hr911880c、bpf-c550+、hr871119c、hr872431c、bpf-c587+、hr871198a、hr911198a、hy911431a、hr911175a、blp-1200+、kat-4-dg+、rth110-di、hr902601b、bw-n20w5+、rth070-hq、bkt-3901+
- 主营：集成电路、传感器、电源芯片、可编程逻辑器件、汽车芯片、MCU单片机、医疗电子、工业控制、模拟芯片、微控制器
- 主营：电子元器件、汽车芯片
- 主营：2x2poeude、a2547h-2p、间距板、插座cpu、74hc4050d、11.7mmfci、4.7h0.8mm、双排10p、双排50p、25p外壳、针座jst、插孔hd3、a2008h-4p、耦合器、hm3504e-e、插件带、光纤1x1、wx1860al4、wx1860al2、10p2.54mm、双排12p、hl2107v-a、双排30p、缓冲器、晶体管
- 主营：塑封mos、激光头、接收管、cbb电容、max232cpe、温度管、irf740pbf、fsw25n50b、ixtk62n25、放大器、芯片mos、定时器、传感器、mje15035g、251239r1w、保险管、to-126npn、保险丝、转换器、5mm热敏、贴片led、adm202ean、pwm控制、sr240ss24、电阻包
- 主营：dzta42qta、39100-1.8、st3232ebt、st232ecdr、st202ecdr、st232actr、mpc8280vra、63cpq100pbf、adl5310acpz、irfz48npbf、irfz34npbf、irf9630pbf、irlz34npbf、irf3205pbf、irfb4321pbf、irfp150npbf、ir3475mtrpb、kp40102btld、irfb4229pbf、fgh40n60ufd、irfb7537pbf、irl3705npbf、tlv271idbvr、ir3802mtrpbf、ir3537mtrpbf
- 主营：hef4040bt、ld7750rgr、gl850g-37、smaj6.0ca、sy7201abc、nce60p04y、aw8145csr、nce01p13k、sy7203dbc、74hc123pw、锂电池、stn1hnk60、hef4046bt、fds4435bz、ika15n60t、iso7721dr、stp20nm60、hef4081bt、lm3150mhx、max485esa、irf840pbf、fdms6681z、1318183-1、max660esa、bq32000dr
- 主营：电源管理、稳压管、微控制器、传感器、模块、继电器、集成电路、稳压器、电容、控制器、连接器、储存IC、MOS管、模数转换芯片ADC、逻辑器件
- 主营：二极管、集成电路