Accurate AC DC current sensor AKM CQ2233 with electrical isolation and fast response time in compact design
Product Overview
The CQ-2233 is an open-type current sensor utilizing Hall sensor technology to provide an analog voltage output proportional to AC/DC current. It features a quantum well ultra-thin film InAs Hall sensor for high-accuracy and high-speed current sensing. The compact AI-Shell package integrates the Hall sensor, magnetic core, and primary conductor, ensuring space-saving design and high reliability. This bidirectional sensor offers electrical isolation between the primary conductor and the sensor signal, operates on a 3.3V single supply, and provides a ratiometric output. It is designed for low variation and low temperature drift of sensitivity and offset voltage, with low noise output and a fast response time. The CQ-2233 is compliant with IEC/UL 62368-1, UL 508, CSA C22.2 No. 14, and IEC 62109 (certification pending).
Product Attributes
- Brand: AKM (Asahi Kasei Microdevices Corporation)
- Sensor Type: Hall Sensor
- Package Type: AI-Shell, Small-sized, Halogen-free
- Certifications: IEC/UL 62368-1, UL 508, CSA C22.2 No. 14 (IEC 62109 certification pending)
- Material: Indium Arsenide (InAs) for Hall sensor, Tin (Sn) plating for terminals
- Operation: Bidirectional, Electrical Isolation
Technical Specifications
| Parameter | Symbol | Conditions | Min. | Typ. | Max. | Units | Notes |
|---|---|---|---|---|---|---|---|
| Maximum Primary Current (RMS) | IRMSmax | -50 | 50 | A | |||
| Current Consumption | IDD | No loads | 6.2 | 9.6 | mA | ||
| Sensitivity | Vh | 37.1 | 37.9 | mV/A | See Figure 5 | ||
| Offset Voltage | Vof | IIN = 0A | 1.636 | 1.650 | 1.664 | V | Note 1 |
| Linear Sensing Range | INS | -35 | 35 | A | |||
| Linearity Error | -1 | 1 | %F.S. | Note 1, See Figure 5 | |||
| Rise Response Time | tr | CL = 100pF | 1 | s | See Figure 8 | ||
| Fall Response Time | tf | CL = 100pF | 1 | s | See Figure 8 | ||
| Bandwidth | fT | -3dB, CL = 100pF | 300 | kHz | |||
| Output Noise | VNrms | 100Hz to 4MHz | 1.2 | mVrms | Note 2 | ||
| Temperature Drift of Sensitivity | Vh-dmax | Ta = 40 to 110C | 0.4 | % | See Figure 6 | ||
| Temperature Drift of Offset Voltage | Vof-dmax | Ta = 40 to 110C, IIN = 0A | 5.5 | mV | See Figure 7 | ||
| Ratiometric Error of Sensitivity | Vh-R | VDD = 2.97V to 3.63V | -1 | 1 | % | Note 2 | |
| Ratiometric Error of Offset Voltage | Vof-R | VDD = 2.97V to 3.63V, IIN = 0A | -0.6 | 0.6 | %F.S. | Note 2 | |
| Total Accuracy | ETO | Ta = 40 to 110C | 1.3 | %F.S. | Note 3 | ||
| Primary Conductor Resistance | R1 | 100 | |||||
| Isolation Voltage | VINS | AC 50/60Hz, 60sec | 3 | kV | Note 2 | ||
| Isolation Resistance | RINS | DC 1kV | 500 | M | Note 2 | ||
| Clearance Distance | dCL | between the primary and the secondary | 13.3 | mm | Note 2 | ||
| Creepage Distance | dCP | between the primary and the secondary | 13.3 | mm | Note 2 | ||
| Supply Voltage | VDD | Recommended Operating Conditions | 2.7 | 3.3 | 3.63 | V | |
| Analog Output Current | IOUT | Recommended Operating Conditions | -0.5 | 0.5 | mA | VOUT pin | |
| Output Load Capacitance | CL | Recommended Operating Conditions | 100 | pF | VOUT pin | ||
| Operating Ambient Temperature | Ta | Recommended Operating Conditions | -40 | 110 | C | See Figure 4 | |
| Supply Voltage | VDD | Absolute Maximum Ratings | -0.3 | 6.5 | V | VDD pin | |
| Analog Output Current | IOUT | Absolute Maximum Ratings | -1 | 1 | mA | VOUT pin | |
| Storage Temperature | Tstg | Absolute Maximum Ratings | -40 | 150 | C |
Notes:
- Note 1: These parameters can drift by the values in 14. Reliability Tests after the reflow and over the lifetime of this product.
- Note 2: These parameters are guaranteed by design.
- Note 3: Total accuracy ETO is calculated by the equation below. ETO = |100 (Vh_meas Vh) / Vh| + |100 (Vof_meas Vof_meas_35) / (Vh |INS| 2)| + |meas| where Vh_meas[mV/A], Vof_meas[mV], meas[%F.S.] represent the measured value of sensitivity, offset voltage and linearity error respectively, Vh[mV/A] represent the typical value of sensitivity, and Vof_meas_35[mV] represent the measured value of offset voltage at Ta = 35C. In the case of CQ-2233, ETO is calculated by the equation as below. ETO = |100 (Vh_meas 37.5) / 37.5| + |100 (Vof_meas Vof_meas_35) / (37.5 35 2)| + |meas|
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