CZ3A Series

Clearance, Creepage distance ≧ 8.0mm
3.3V Output, High Accuracy
Coreless Current Sensor ICs
supporting 50Arms

Current Sensor ICs

Overview

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.

Features

CZ3A Series

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.

Specifications

Series
 
  CZ3A Series
Current sensor type   Coreless Current Sensor IC :
Currentier
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
Maximum Primary
Current
[Arms] 50
Working Voltage 
(pollution degree=2)
[Vrms] 558
(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)
VREF Pin   Non-existence
Disturbance magnetic field
fluctuation suppression  function
  Existence
Overcurrent
detection function
  Existence
(Two systems,
Adjustable threshold)
Ratiometric /
Non-Ratiometric
  Non-Ratiometric
Safety Standards   IEC/UL62368-1 certified
UL1577 certified
Pb Free   Yes
Halogen Free   Yes
MSL   MSL2a
JEDEC Standard Packaging   Compliant
Packaging   TAPE
Minimum Order Quantity [pcs.] 1000
Part Status
 
  Preview
CZ3A Series Block Diagram

Lineup


CZ3A Series 
You can download a datasheet (PDF file) below.

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
±0.6 ±2.8

0.2
(Typ.)

0.4
(Max.)

1 14.5

4.5
(Typ.)

5.5
(Max.)

29.1

1.5
(Typ.)

2.5
(Max.)

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
±0.6 ±2.8

0.2
(Typ.)

0.4
(Max.)

3.6 14.5

5.5
(Typ.)

6.7
(Max.)

29.1

2.5
(Typ.)

3.7
(Max.)

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 ± 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.

Design Support

Technical Resources

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.

Find other products

Search by Selection Table

You can select a product from the product specifications.
Click on the product series name to see the details.

Current 
Sensor 
Type
Package Supply
Voltage
Output
Voltage
Effective
Current
Measurement
Range
Bipolar /
Unipolar
Ratiometric/
Non-Ratiometric
Creepage
Clearance
Working
Voltage *
Product 
Name
Product
Series
(V) (V) (Arms) (Apeak) (mm) (Vrms)
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
20.9 Unipolar
Through
Hole 
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