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[Notes] * Information on this page is current on the date of press release. * AKM is trademark of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States. * Appellations, company names and product names on this page are trademarks or registered trademarks of respective companies.
AKM begins sample distribution of the CQ3M Series, a ΣΔ digital output coreless current sensor IC for robots and AC servo amplifiers
CQ3M series supports a wide measurement range of up to ±235 A, contributing to system miniaturization and simplified design
2026/10/27
Overview
Asahi Kasei Microdevices Corporation (AKM) has begun sample distribution of the CQ3M series, a coreless current sensor IC with ΣΔ digital output for robots and AC servo amplifiers. Mass production of the CQ3M series is scheduled to begin around April 2027.
The CQ3M series integrates a ΣΔ modulator and can replace a shunt resistor + isolated ADC in a single package. Its wide measurement range of up to ±235 A and low primary conductor resistance of 0.27 mΩ help reduce heat-dissipation area and cooling components across a broad range of system capacities.
Product Features
"Shunt Resistor + Isolated ADC" function integrated into a single package
The CQ3M series integrates the current sensor and ΣΔ modulator in a single package. This significantly reduces the number of components required for a shunt resistor + isolated ADC solution, enabling system miniaturization.
No isolated power supply is required on the primary side, simplifying isolation design.
Low Heat Generation and Easier Thermal Design with 0.27 mΩ Primary Conductor Resistance
AKM has developed a unique package to achieve a low primary conductor resistance of 0.27 mΩ. Compared with shunt resistors, the CQ3M series reduces heat generation and makes thermal design easier.
Wide Measurement Range of up to ±235 A for High-Current Systems
The CQ3M series inherits the ΣΔ digital output and low-resistance design of the CQ36 series, while extending the measurement range to as much as ±235 A.
High-Accuracy Motor Control and Fast Overcurrent Detection
The CQ3M series is a current sensor that combines high-accuracy current sensing with fast overcurrent protection. In addition to accurate sensing through its ΣΔ output, a dedicated overcurrent detection function enables fast protection without the response delay caused by digital filtering. This helps reduce component count and improve system reliability.
Applications
- Multi-axis Robots
- Collaborative Robots
- Humanoid Robots
- AC Servo Amplifiers
Product Details
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