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CQ3M Series
Coreless Current Sensor with ΣΔ Digital Output - Optimized for Robots and AC Servo Amplifiers
Significantly reduces heat generation and contributes to system miniaturization.
CQ3M Series
Overview
- Digital ΣΔ output (built-in ADC)
- Low resistance (0.27 mΩ)
- Reinforced insulation (557 Vrms)
- Measurement range: ±11 A to ±235 A
- Built-in fast overcurrent detection
- Built-in sensitivity selectable function
The CQ3M contributes to:
- System miniaturization
- Reduced design effort for thermal management and electrical isolation
- High-accuracy motor control and fast overcurrent detection
The CQ3M series integrates a ΣΔ modulator and can replace a shunt resistor + isolated ADC solution with a single component. It is highly compatible with robots and AC servo amplifiers, contributing to system miniaturization.
Product Features
1. "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 high-voltage side, simplifying isolation design.
2. 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.
3. 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.
4. 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
- Well-suited for applications requiring isolation, reduced heat generation, and system miniaturization. (Example: Suitable as a replacement for shunt + isolated ADC configurations.)
Product Information
CQ3M Series Block Diagram
| Series | CQ3M Series |
|---|---|
| Current Sensor Type | Coreless Current Sensor IC Currentier |
| Package Size [mm] | 12.7 x 10.9 x 2.25 |
| Package Type | Small-Sized Surface Mount Package (SMD) |
| Power Supply Voltage [V] | 3.3 |
| Operating Temperature [℃] | -40 to 125 |
| Maximum Primary Current [Arms] | 100 |
| Working Voltage [Vrms] (Pollution Degree=2) | 557 (Reinforced Insulation) |
| Creepage / Clearance Distance (Min.) [mm] | 8.0 |
| Primary Conductor Resistance (Typ.) [mΩ] | 0.27 |
| Isolation Voltage [kVrms] | 5 (AC50Hz, 60s) |
| Stray Magnetic Field Reduction | Yes |
Overcurrent Detection Function
| Yes |
Sensitivity-Selectable Function
| Yes |
| Ratiometric / Non-Ratiometric | Non-Ratiometric |
| Safety Standards | IEC/UL62368-1 Certified Pending UL1577 Certified Pending |
| Pb Free | Yes |
| Halogen Free | Yes |
| MSL | MSL2a |
| Packing | Tape |
| Minimum Order Quantity [pcs.] | 1000 |
| Part Status | Preview |
Example of replacement for shunt + isolated ADC
Lineup
| Product Name | Clock type | Clock Frequency | Linear Sensing Range (Apeak) | Sensitivity (%/A) | Overcurrent Detection Threshold | ||
|---|---|---|---|---|---|---|---|
| Min. (A) | Max. (A) | ||||||
CQ3M0x Sensitivity-Fixed Version | CQ3M01 | Input / Output Select via communication Factory Setting: Output | 20 MHz | ±11 | 4.00 | ±5.25 | ±26.24 |
| CQ3M02 | ±22 | 2.00 | ±10.50 | ±52.49 | |||
| CQ3M03 | ±44 | 1.00 | ±20.99 | ±104.98 | |||
| CQ3M04 | ±88 | 0.50 | ±41.98 | ±209.96 | |||
| CQ3M05 | ±115.2 | 0.382 | ±54.95 | ±274.82 | |||
| CQ3M06 | ±176 | 0.25 | ±83.96 | ±419.93 | |||
| CQ3M07 | ±235.3 | 0.187 | ±112.24 | ±561.41 | |||
CQ3M1x Sensitivity-Selectable Version | CQ3M11 | Selectable | Selectable | Selectable | Selectable | ||
Technical information
You can use useful simulation or calculation tools for your design. Please note that you are required to register your information when using some of those tools.
CQ3M Series Product Brief
This brief provides an overview of the CQ3M Series and its benefits.
Application Note
Download our guide to the CQ3M series for key insights and design tips.
Coming soon
PCB Design Kit
We provide evaluation board Gerber data, PCB symbol, footprint, and 3D model.
ZIP
Coming soon
FAQ
Coming soon
Quality Data
Coming soon
Certified with safety standards
Coming soon
Design Support
You can use useful simulation or calculation tools for your design. Please note that you are required to register your information when using some of those tools.
Series lineup
| Application | Supply Voltage | Output Voltage | Measurement Range | Ratiometric/ Non-Ratiometric | Creepage Clearance | Working Voltage * | Product Series | Part Status |
|---|---|---|---|---|---|---|---|---|
| (V) | (V) | (Apeak) | (mm) | (Vrms) | ||||
| Industrial | 5.0 | 5.0 | ± 115 to ± 225 | Ratiometric | ≧ 8.0 | 1118 | CZ375 Series | MP |
| ± 5.3 to ± 180 | CZ370 Series | MP | ||||||
| 0 to 345.2 | CZ372 Series | MP | ||||||
| 3.0 | ± 11.6 to ± 166.6 | Non-Ratiometric | CZ3A Series | MP | ||||
| 3.3 | 3.3 | ± 12.9 to ± 129.1 | ||||||
| AVDD=5.0V DVDD=3.3V | ± 10.5 to ± 168.0 | CQ36 Series (ΣΔ digital output) | MP | |||||
| 3.3 | ±11 to 235.3 | CQ3M Series (ΣΔ digital output) | Preview | |||||
| Automotive / Industrial | 5.0 | 5.0 | ± 20.9 to ± 154.0 | Ratiometric | CZ39 Series | MP |
* Pollution Degree II with basic insulation
Inquiries about Current Sensors
For any inquiries regarding products, samples, technology, consultations, estimates, or purchases, please feel free to contact us.