Ultra-low Noise Coreless Current Sensor

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AK3103 is an open-type current sensor using a Hall sensor which outputs the analog voltage in proportion to the AC/DC current. Ultra low noise property is realized by a III-V compound semiconductor Hall element of high sensitivity and signal processing technology. In addition, since AK3103 has a coreless structure and does not contain magnetic material, it has no hysteresis and is suitable for audio applications. AK3103 is especially suitable for a Motional Feedback system that feedbacks the current of voice coils of the speaker to the amplifier and controls the movement of the voice coils.
AK3103 adopts an ultra-small coreless package which is compliant with safety standards, suitable for applications such as motor control for industrial equipments. Since AK3103 has ultra low noise, it can detect the current by high resolution, which contributes to high-precision torque control of the motor.

Key Features

□ Ultra low noise : -108 dBm / √ Hz (integrated noise 0.35 mVrms, 100 Hz to 200 kHz integration)
□ No hysteresis output, because of not containing the magnetic material
□ Very small primary conductor resistance : 1.6 mΩ
□ High Accuracy : 1.5% F.S. (Ta = -40 to 90 °C Typ.)
□ Small and thin surface mount package : 7.9 mm × 7.6 mm × 1.15 mm
□ Certified with safety standards of IEC / UL 60950, UL 1577 certification pending
□ Isolation voltage : 3.0 kVrms (AC 50/60 Hz, 60 s)
□ Fast Response Time : 2μs Typ.
□ Ratiometric output
□ Operated by single power supply : VDD = 5 V

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Block Diagram

Block Diagram

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