Clearance, Creepage distance ≧ 8.0mm
3.3V Output, High Accuracy
Coreless Current Sensor ICs
Current Sensor ICs
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.
This page contains information about the features of the CZ3A series, product details, datasheets, and product lineup information. It also provides technical information such as safety standard information and application notes.
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.
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.
It is suitable for the application which requires insulation and achieve small size with low heat generation.
|Current sensor type||Coreless Current Sensor IC :
|Package size||[mm]||12.7 x 10.9 x 2.25|
|Package Type (Mounting style)||Small Outline Package (SOP)|
|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|
|Creepage / Clearance
|Isolation Voltage||[kVrms]||CZ3A0x : 4.2
CZ3AGx : 3.0
|Disturbance magnetic field
fluctuation suppression function
|Safety Standards||IEC/UL62368-1 certified
|JEDEC Standard Packaging||Compliant|
|Minimum Order Quantity||[pcs.]||1000|
CZ3A Series You can download a datasheet (PDF file) below.
|Overcurrent detection 1||Overcurrent detection 2||Datasheet
*1 It is defined as the "average value ± 3σ" of the actual measurement result (Ta = 35 to 85 °C) in a certain lot.
*2 The typical value is defined as the “average value ± 1σ” of the actual measurement result (Ta = 35 to 85 °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 = 35 to 85 °C) in a certain lot.
You can download documents and data necessary for design. Please make use of them when designing.
Certified with safety standards
The CZ3A series has UL-60950, IEC60950, and UL-1577 certifications. You can download a detailed PDF file below.
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|Coreless||SOP||5.0||5.0||60||± 5.3 to ± 180
||Bipolar||Retiometric||≧ 8.0||1118||CZ370x||CZ37 Series|
|0 to 345.2||Unipolar||CZ372x|
|3.0||50||± 11.6 to ± 166.6||Bipolar||Non-Ratiometric||CZ3AGx||CZ3A Series|
|3.3||3.3||± 12.9 to ± 129.1||CZ3A0x|
|5.0||5.0||20||± 4.5 to ± 42||Bipolar
||Retiometric||≧ 5.0||1000||CQ330x||CQ3 Series|
|± 20.5 to 42||Unipolar|
|3.3||3.3||± 8.5 to ± 44||Bipolar||CQ320x|
|DIP||5.0||5.0||50||± 21 to ± 170||Bipolar||≧ 13.3||1330||CQ233x||CQ2 Series|
|3.3||3.3||± 21 to ± 85||CQ223x|
|5.0||5.0||± 170||≧ 2.7||270||CQ2366|
* Pollution Degree II with reinforced insulation