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About AKM
CZ3A Series
Establishes a new standard for overcurrent protection and short-circuit detection in systems.
Features high-precision analog output and dual overcurrent detection outputs.
CZ3A Series
Overview
- Clearance, Creepage distance ≧ 8.0mm
- 3.3V Output, High Accuracy
- Coreless Current Sensor ICs
- supporting 50Arms
What can be done with CZ3A series?
- Low heat generation
- Improve system efficiency
- System downsizing
- Precise control
The CZ3A series of coreless current sensor ICs has creepage and clearance distances of 8 mm or more, generates less heat, and is accurate. The CZ37 series and CZ3A series have the same package profile and support 5V and 3V outputs, respectively. The CZ3A series supports 3V output, making it ideal for use with 3V microcontrollers, which have grown in popularity in recent years.
The CZ3A series has built in dual overcurrent detection with adjustable thresholds. This provides a great deal of control freedom, such as making it possible to use one line for overcurrent detection and the other to perform control using control mode.
Features
1. 3.3V output
The CZ3A series supports 3.3V output. It is best for a sensor signal input to a 3.3V AD converter.
In addition, this series has both VDD 5V and 3.3V products as below.
VDD=5V, Output=3V
VDD=3.3V, Output=3.3V
2. Creepage distance/Clearance ≧ 8mm
By developing AKM's original package, both creepage distance and clearance of 8.0mm or more is achieved.
The CZ3A series supports a working voltage of over 550Vrms and can be used with 400V reinforced insulation.
3. Support wide current range and 50Arms Low-heat Generation
CZ3A series has a low resistance of 0.27mΩ as the primary conductor resistance with AKM's original package. As a result, compared to shunt resistors and similar products of other companies, heat generation when applying the current can be greatly suppressed, and 50Arms continuous current is achieved. Furthermore, availability with wide current detection ranges is available. This enables to adopt common design of system boards, making it easy to roll it out to other models with different ratings.
4. Overcurrent detection function
The CZ3A series has two overcurrent detection circuit, and each overcurrent detection threshold can be adjusted from the outside. Therefore, it makes easier to design the protection of the system.
Applications
- AC motors
- DC motors
- UPS (Uninterruptible Power Supply)
- General Inverter (Drives)
- Power Conditioners (DC side)
It is suitable for the application which requires insulation and achieve small size with low heat generation.
Find other products
CZ3A Series Block Diagram
| Series | CZ3A 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] | CZ3A0x : 3.3 (2.7 to 3.63) CZ3AGx : 5.0 (4.5 to 5.5) |
| Operating Temperature [℃] | -40 to 85 |
| Maximum Primary Current [Arms] | 50 |
| 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] | CZ3A0x : 4.2 (AC50Hz, 60s) CZ3AGx : 3.0 (AC50Hz, 60s) |
| Stray Magnetic Field Reduction | Yes |
| Overcurrent Ddetection Function | Yes |
| Ratiometric / Non-Ratiometric | Non-Ratiometric |
| Safety Standards | IEC/UL62368-1 Certified UL1577 Certified |
| Pb Free | Yes |
| Halogen Free | Yes |
| MSL | MSL2a |
| Packing | Tape |
| Minimum Order Quantity | 1000 |
| Part Status | MP |
Lineup / Datasheet
| Product Name | Supply Voltage | Output Voltage | Linear Sensing Range | Sensitivity | Temperature Drift of Sensitivity *1 | Temperature Drift of Zero-Current Output *1 | Total Accuracy *2 | Response Time | Overcurrent detection 1 | Overcurrent detection 2 | Datasheet Download (PDF) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Threshold 1 Adjustable Range Max | Response time | Threshold 2 Adjustable Range Max | Response time | ||||||||||
| [V] | [V] | [A] | [mV/A] | [%] | [mV] | [%F.S.] | [μs] | [A] | [μs] | [A] | [μs] | ||
| CZ3A01 | 3.3 | 3.3 | ±12.9 | 120 | ±0.8 | ±3.0 | 0.3 0.6 | 1 | 14.5 | 4.5 5.5 | 29.1 | 1.5 2.5 | CZ3A01 DS |
| CZ3A02 | ±15.5 | 100 | 17.5 | 35.0 | CZ3A02 DS | ||||||||
| CZ3A03 | ±22.1 | 70 | 25.0 | 50.0 | CZ3A03 DS | ||||||||
| CZ3A04 | ±32.2 | 48 | 36.4 | 72.9 | CZ3A04 DS | ||||||||
| CZ3A05 | ±64.5 | 24 | 72.9 | 145.8 | CZ3A05 DS | ||||||||
| CZ3A06 | ±103.3 | 15 | 116.6 | 233.3 | CZ3A06 DS | ||||||||
| CZ3A07 | ±129.1 | 12 | 145.8 | 291.6 | CZ3A07 DS | ||||||||
| CZ3AG1 | 5.0 | 3.0 | ±11.6 | 120 | ±0.8 | ±2.7 | 0.3 0.6 | 3.6 | 14.5 | 5.5 6.7 | 29.1 | 2.5 3.7 | CZ3AG1 DS |
| CZ3AG2 | ±14.0 | 100 | 17.5 | 35.0 | CZ3AG2 DS | ||||||||
| CZ3AG3 | ±20.0 | 70 | 25.0 | 50.0 | CZ3AG3 DS | ||||||||
| CZ3AG4 | ±29.1 | 48 | 36.4 | 72.9 | CZ3AG4 DS | ||||||||
| CZ3AG5 | ±58.3 | 24 | 72.9 | 145.8 | CZ3AG5 DS | ||||||||
| CZ3AG6 | ±93.3 | 15 | 116.6 | 233.3 | CZ3AG6 DS | ||||||||
| CZ3AG7 | ±116.6 | 12 | 145.8 | 291.6 | CZ3AG7 DS | ||||||||
[Notes]
*1 It is defined as the "average value ± 1σ" of the actual measurement result (Ta = 0 to 90 °C) in a certain lot.
*2 The typical value is defined as the “average value ± 1σ” of the actual measurement result (Ta = 0 to 90 °C) in a certain lot.
In the same manner, the minimum and maximum values are defined as the “average value ± 3σ” of the actual measurement result (Ta = 0 to 90 °C) in a certain lot.
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.
Application Note
Download our guide to the CZ3A series for key insights and design tips.
PDF (2.03MB)
PCB Design Kit
We provide evaluation board Gerber data, PCB symbol, footprint, and 3D model.
ZIP (1.43MB)
MATLAB Simulation Model
We provide MATLAB/Simulink simulation models
FAQ
Product-related FAQs
Quality Data
The AKM Group prepares quality data.
Certified with safety standards
The CZ3A series has UL62368, IEC62368, and UL1577 certifications. You can download a detailed PDF file below.
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 | Maximum Primary Current | Measurement Range | Ratiometric/ Non-Ratiometric | Creepage Clearance | Working Voltage * | Product Series | Part Status |
|---|---|---|---|---|---|---|---|---|---|
| (V) | (V) | (Arms) | (Apeak) | (mm) | (Vrms) | ||||
| Industrial | 5.0 | 5.0 | 100 | ± 115 to ± 225 | Ratiometric | ≧ 8.0 | 1118 | CZ375 Series | MP |
| 60 | ± 5.3 to ± 180 | CZ370 Series | MP | ||||||
| 0 to 345.2 | CZ372 Series | MP | |||||||
| 3.0 | 50 | ± 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 | 60 | ± 10.5 to ± 168.0 | CQ36 Series (ΣΔ digital output) | MP | |||||
| Automotive / Industrial | 5.0 | 5.0 | 40 | ± 20.9 to ± 154.0 | Ratiometric | ≧ 7.2 | 1013 | 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.