AKM CZ3722 Spec Sheet

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AKM CZ3722 Spec Sheet | Manualzz

[CZ-3722]

Clearance/Creepage 8mm

CZ-3722

60A

rms

Accurate Coreless Current Sensor

1.

General Description

CZ-3722 is an open-type current sensor using Hall sensors, which outputs the analog voltage proportional to the AC/DC current. Group III-V semiconductor thin film is used as the Hall sensor, which enables the high-accuracy and high-speed current sensing. Coreless ultra-small surface mount package realizes the space-saving. Also, the low primary conductor resistance suppresses heat generation to achieve the 60Arms continuous current. Existing coreless current sensors have an accuracy disadvantage from degradations caused by a disturbed magnetic field. The CZ-372x series has a built-in stray magnetic field reduction function to suppress this effect. The CZ-372x series is also UL 61800-5-1 safety compliant, which is an excellent fit for industrial AC drives, servo motors, etc. The CZ-372x series has a large variety of linear measurement ranges, from 10.3A (CZ-3720), to 345.2A, (CZ-3726).

This enables the designer to use the same board design across different products and helps the user to expand the options to different current ratings.

2.

Features

□ Compliant with safety standard of UL61800-5-1 (Clearance, Creepage distance ≥ 8.0mm)

□ Certified with safety standards of UL-1577 and IEC/UL60950-1

□ Maximum Primary Current : 60A rms

□ High-accuracy : 1.0%F.S.(T a

=0~90°C Typ.)

□ Quite small primary conductor resistance : 0.27mΩ Typ.

□ Fast response time : 1μs Typ.

□ Stray magnetic field reduction function

□ Small-sized surface mount package

12.7mm×10.9mm×2.25mm

□ Differential output with VREF pin

□ Isolation Voltage

3.0kV

AC50Hz

60s

□ Ratiometric output

3.

Applications

□ AC motors

□ DC motors

□ UPS

□ General Inverters

□ Power conditioners

Also, CZ-3722 is suitable for other applications which are required isolation with small size and suppressing heat generation.

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4.

Table of Contents

1. General Description ......................................................................................................................... 1

2. Features........................................................................................................................................... 1

3. Applications ..................................................................................................................................... 1

4. Table of Contents............................................................................................................................. 2

5. Block Diagram and Functions ......................................................................................................... 3

6. Pin Configurations and Functions ................................................................................................... 4

7. Absolute Maximum Ratings............................................................................................................. 5

8. Recommended Operating Conditions ............................................................................................. 5

9. Electrical Characteristics ................................................................................................................. 6

10. Characteristic Definitions ................................................................................................................. 8

11. External Circuits Example ............................................................................................................. 10

12. Board Layout for measuring thermal resistance ........................................................................... 10

13. Package .......................................................................................................................................... 11

14. Reliability Tests .............................................................................................................................. 14

15. Precautions .................................................................................................................................... 15

IMPORTANT NOTICE ................................................................................................................... 16

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5.

Block Diagram and Functions

IP

Primary

Conductor

Hall

Sensors

Bias Unit

Amplifier

Compensation

EEPROM Unit

Buffer

Voltage

Generator

[CZ-3722]

VOUT

VREF

VSS

VDD

IN

TEST1 TEST2 TEST3

Figure 1. Block diagram of CZ-3722

Table 1

Explanation of circuit blocks

Circuit Block Function

Primary Conductor A device has the primary conductor built-in.

Hall Sensors

Amplifier

Hall elements which detect magnetic flux density generated from the measured current.

Amplifier of Hall elements’ output.

Buffer

Output buffer with gain. This block outputs the voltage (V proportional to the current applied to the primary conductor.

OUT

)

Compensation

Bias Unit

EEPROM Unit

Compensation circuit which adjusts the temperature drifts of sensitivity and zero-current voltage.

Drive circuit for Hall elements.

Non-volatile memory for setting adjustment parameters.

Voltage Generator Reference voltage generating circuit of V

OUT

.

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6.

Pin Configurations and Functions

1

2

CZ-3722

(Top View)

V

OUT

- V

REF

6

5

4

3

10

9

8

7

IN→IP

−I

NS

0.9V

DD

0

IP→IN

I

IN

I

NS

-

0.1V

DD

3

4

5

6

Pin

No.

1

2

7

8

9

10

Figure 2.

Pin configurations and typical output characteristics of CZ-3722

Table 2

Pin configuration and functions of CZ-3722

Pin

Name

IP

IN

VSS

TEST1

VREF

VOUT

VDD

TEST2

TEST3

VSS

I/O

I

I

GND

O

O

PWR

GND

Type Function

Primary conductor pin ( + )

Primary conductor pin ( - )

Power Ground pin (GND)

― Test pin (Recommended external connection : GND)

Analog Reference output pin

Analog Sensor output pin

Power Power supply pin (5V)

― Test pin (Recommended external connection : OPEN)

― Test pin (Recommended external connection : OPEN)

Power Ground pin (GND)

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7.

Absolute Maximum Ratings

Table 3

Absolute maximum ratings

Parameter

Supply Voltage

Analog Output Current

Symbol

V

DD

I

OUT

Min.

-

0.3

-

10

Max.

6.5

10

Units

V mA

Notes

VDD pin

VOUT pin, VREF pin

Junction Temperature

Storage Temperature

WARNING:

T j

T

STG

-

40

-

40

150

150

°C

°C

Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes.

8.

Recommended Operating Conditions

Parameter

Supply Voltage

Sensor Output Load

Capacitance 1

Reference Output Load

Capacitance 2

Sensor Output Load

Resistance 1

Reference Output Load

Resistance 2

Table 4 . Recommended operating conditions

Symbol

V

DD

Min.

4.5

Typ.

5.0

Max.

5.5

C

C

R

R

LVOUT

LVREF

LVOUT

LVREF

3

3

1000

1000

Units Notes

V VDD pin pF

Between VOUT pin and

VSS pin pF kΩ

Between VREF pin and

VSS pin

Between VOUT pin and

VSS pin

Between VOUT pin and kΩ

VDD pin

Between VREF pin and

VSS pin

Between VREF pin and

VDD pin

Operating Ambient

Temperature

Case Temperature

Note 1)

Thermal Resistance junction to ambient

T a

T c

-

40

-

40

105

130

°C

°C

Compliant with safety standard of UL61800-5-1

Maximum Primary

Current (RMS)

θ ja

I

RMSmax

32

60

°C /W Board Layout is Figure 7.

A rms

Continuous DC value or

RMS value which can be applied to primary conductor

WARNING:

Electrical characteristics are not guaranteed when operated at or beyond these conditions.

Note1. Continuous 60A

rms

current can be flowed through this IC, and even a larger current can be flowed transiently. Using as your system complied with safety standard of UL61800-5-1, the case temperature of this IC should be less than 130°C.

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9.

Electrical Characteristics

Table 5. Electrical Characteristics

Conditions (unless otherwise specified) : T a

=25

C

V

DD

=5V

Parameter

Current Consumption

Sensitivity

Note 2)

Zero-Current Output

Note 2)

Reference Output voltage Note 6)

Linear Sensing Range

Note 3)

Output Saturation

Voltage H Note 4)

Output Saturation

Voltage L Note4)

Linearity Error

Note 5) Note 6)

Rise Response Time

Note 4)

Fall Response Time

Note 4)

Input Current Equivalent

Noise

Ratiometric Error of

Sensitivity

Ratiometric Error of

Zero-Current Output

Stray Magnetic Field

Reduction

Symbol

I

DD

V

I

V

V

I

V

V t t f r h of

ρ h-R

REF

NS satH satL

Nrms

V

V

E of-R bc

I

I

I

I

IN

R

R

IN

V

V

LVOUT

LVOUT

Conditions

I

IN

0A, No loads

I

IN

=0~30A, 500

 s

V h

=(V

OUT

-

V

REF

)/1A

OUT

=3kΩ

=3kΩ

-

V

T a

=-40~105°C

REF

I

F.S.=V satH

-

V satL

IN

90% to V

OUT

90%,

C

LVOUT

= C

LVREF

=1000pF

IN

10% to V

OUT

10%,

C

LVOUT

DD

= C

LVREF

=1000pF

=0A ,DC~400kHz

DD

IN

0A, V

=4.5V~5.5V

=4.5V~5.5V

=0A

Equivalent to Zero-Current output drift

-

10mT <

Stray Magnetic Field <10mT dV/dt Settling Time

Note 4) Note 7)

Primary Conductor

Resistance

Isolation Voltage

Note 8)

Isolation Resistance

Note 3) t

R

V

R dVdt

P

INS

INS

200V/

DC1kV s 200V

AC50Hz, 60s

Retention Time of

EEPROM data

EEP

RT

T j

= 105°C

T j

= 100°C

Min.

0.1×V

DD

-

0.02

V

-

-

DD

-

-

99

0.02

1.7

-

0.3

1.0

0.3

3.0

500

10

15

Typ.

20

100

0.1×V

DD

±0.35

1

1

30

0.01

2

0.27

Max. Units

25 mA

101 mV/A

0.02

0.1×V

DD

+0.02

41.3

0.3

1.0

0.3

V

V

A

V

V

±0.5 %F.S.

 s

 s mA rms

%

%F.S.

A/mT

 s mΩ kV rms

Year

Year

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Table 6. Temperature drift characteristics

Conditions (unless otherwise specified) : V

DD

=5V

Parameter

Temperature Drift of

Sensitivity

Note 5) Note 6) Note 9)

Temperature Drift of

Zero-current Output

Note 5) Note 6) Note 9)

Temperature Drift of

Reference Output

Note 6) Note 9)

Symbol

V

V

V h-d of-d

REF-d

T a

T a

=0~90

°C

=0~105

°C

T a

=-40~105

°C

T a

=0~90

°C I

IN

=0A

T a

=0~105

°C I

IN

=0A

T a

=-40~105

°C I

IN

=0A

T a

Conditions

=-40~105

°C

Total Accuracy

Note 5) Note 6)

E total

T a

=0~90

°C

F.S.=V satH

-

V satL

T a

=0~105

°C

F.S.=V satH

-

V satL

T a

=-40~105

°C

F.S.=V satH

-

V satL

-

-

-

0.9

0.9

1.3

Min.

-

0.6

-

0.6

-

0.9

Typ.

0.3

0.9

0.9

±1.4

±1.7

±4.5

±10

1.0

1.5

1.7

Max.

0.6

1.4

1.7

±3.8

±4.6

±8.1

1.6

2.2

2.9

Units

% mV

%F.S.

Note 2) These values can be drifted by long-term use or reflow process. Please ’14.Reliability Tests’ for the reference of drift values. mV

Note 3) These parameters are guaranteed by design.

Note 4) These parameters are tested in wafer condition.

Note 5) The Typical value is defined as the “average value ± 1σ”of the actual measurement result in a certain lot. The minimum value and the maximum value are defined as “average value ± 3σ”of the same condition.

Note 6) These values can be drifted by long-term use or reflow process.

Note 7) The threshold level of the dV/dt settling time is the convergence value ±2.5mV.

Note 8) This parameter is tested for 1second at 3.6kV

rms

in mass-production line for all devices.

Note 9) These parameters are defined as the drift from the values at T a

=25°C.

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10.

Characteristic Definitions

10.1. Sensitivity(V

h

), Zero-Current Output (V

of

), and Linearity Error (ρ) are defined as below:

Sensitivity(V h

) is defined as the slope of the approximate straight line calculated by the least square method, using the data of output voltage (V

OUT

-V

REF

) when the primary current (I

IN

) is swept within the range of linear sensing range (I

The output voltage (V

OUT

-V

REF

NS

).

) when the primary current (I

IN

) is 0A is the Zero-Current Output (V of

).

Linearity E rror (ρ) is defined as the ratio of the maximum error voltage (V d

) to the full scale (F.S.), where

V d

is the maximum difference between the output voltage

(V

OUT

-V

REF

) and the approximate straight line.

Definition formula is shown as below:

ρ = V d

/ F.S. × 100

Full scale (F.S.) is defined by V satHmin

- V satLmax.

V

OUT

-

V

REF

[V]

Approximate straight line by least square method

V satHmin

-

0.1V

DD

V d

−I

NS

V of

V satLmax

-

0.1V

DD

1

V h

I

NS

F.S.

Figure 3.

Characteristic definitions of

CZ-3722

10.2. Ratiometric Error of Sensitivity is defined as below:

𝑉 ℎ−𝑅

= 100 ×

{

𝑉

𝑉 ℎ ℎ

(𝑉

𝐷𝐷

)

(5𝑉) −

𝑉

𝐷𝐷

5

𝑉

𝐷𝐷

5 }

10.3. Ratiometric Error of Zero-Current Output is defined as below:

𝑉 𝑜𝑓−𝑅

= 100 ×

(𝑉 𝑜𝑓

(𝑉

𝐷𝐷

) −

𝑉 𝑜𝑓

𝐹. 𝑆.

(5𝑉) × 𝑉

𝐷𝐷

5

)

I

IN

[A]

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10.4. Total Accuracy E

total

[%F.S.] is defined as below:

𝐸 𝑡𝑜𝑡𝑎𝑙

= 100 ×

𝑉 𝑒𝑟𝑟

𝐹. 𝑆.

𝑉 𝑒𝑟𝑟

= (𝑉 ℎ−𝑚𝑒𝑎𝑠

− 𝑉 ℎ

) × 𝐼

𝑁𝑆

+ 𝑉 𝑜𝑓−𝑑

+ 𝜌 𝑚𝑒𝑎𝑠

× 𝐹. 𝑆.

𝑉 ℎ−𝑚𝑒𝑎𝑠

Measured Sensitivity value [mV/A]

𝑉 ℎ

Sensitivity (Typ.) [mV/A]

𝑉 𝑜𝑓−𝑑

Measured Temperature Drift of Zero-Current Output [mV] 𝜌 𝑚𝑒𝑎𝑠

Measured Linearity Error [%F.S.]

V

OUT

-

V

REF

[V]

Output of typical sensitivity

V satH

-0.1V

DD

V err

F.S.

-

I

NS

IN→IP

IP→IN

I

NS

V satL

-0.1V

DD

Figure 4.

Total Accuracy of CZ-3722

10.5. Rise Response Time t

r

[μs] and Fall Response Time t

f

[μs]

Rise response time (or fall response time) is defined as the time delay from the 90% (or 10%) of input primary current (I

IN

) to the 90% (or 10%) of the output voltage (V

OUT

-

V

REF

) under the pulse input of primary current (Figure 5).

I

IN

[A]

I

IN

[A]

90% I

IN

Time [

 s]

10% I

IN

Time [

 s]

V

OUT

-V

REF

[V]

V

OUT

-V

REF

[V]

[V]

90% V

OUT

-V

REF

10% V

OUT

-V

REF t r

Time [

 s] t f

I

IN

[A]

Time [

 s]

Rise response time (t r

) Fall response time (t

Figure 5. Definition of response time f

)

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I

IN

I

IN

IP

IN

11.

External Circuits Example

VSS

TEST3

TEST2

VDD

VOUT

VREF

TEST1

VSS

5V

(a)

0.1μF

R1

R1

(b)

C1

C1

ADC

Figure 6. External circuits example

(a) 0.1μF bypass capacitor should be placed close to CZ-3722.

(b) Add a low-pass filter if it is necessary. The C1 values should be fixed in consideration of load conditions.

12.

Board Layout for measuring thermal resistance

Table 7. Board information

Board Size

Layer number

68.58mm×63.5mm

4

Copper layer thickness 70μm

Board Thickness 1.6mm

Top pattern(1st)

Inner pattern(2nd/3rd VSS)

Bottom pattern(4th)

Figure 7. Board layout for measuring thermal resistance of CZ-3722

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13.

Package

13.1. Outline Dimensions

The tolerances of dimensions without any mention are ±0.1mm.

( ) are reference values.

Figure 8. Outline dimensions of CZ-3722

Terminals : Cu

Plating for Terminals : Sn-Bi

Package material : RoHS compliant, halogen-free

Table 8

Isolation characteristics of CZ-3722

Parameter

Creepage distance

Clearance distance

Symbol

Cr

Cl

Min.

8.0

8.0

*Flammability standard is V0. (According to UL94)

Typ.

*Comparative tracking index (CTI) is 600V. Material Group is I .

Max. Units mm mm

Unit : mm

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13.2. Standards

・ IEC/UL 60950-1 – Information Technology Equipment – Edition 2. (File No.E359197)

CSA C22.2 NO. 60950-1-07 – Information Technology Equipment – Edition 2. (File No. E359197)

UL1577

Optical Isolators

Edition 5.(File No. E499004)

CSA Component Acceptance Service No. 5A

Component Acceptance Service for Optocouplers and

Related Devices (File No. E499004)

13.3. Recommended Pad Dimensions

Figure 9. Recommended pad pattern

Table 9. Recommended pad dimensions

L 1.59

E 11.79

W1 4.44

W2

C

P

0.64

0.66

1.27

Unit:mm

If two or more trace layers are used as the current paths, please make enough number of through-holes to flow current between the trace layers. In order to make heat dissipation better, it is recommended that Pad on Via should be provided on the pad of the primary conductor.

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13.4. Marking

Production information is printed on the package surface by laser marking. Markings consist of 11 characters excluding AKM logo.

A

C

Y

K

Z

M

M

3

D

7

L

2

2

L

1

2

Production Code (CZ-3722)

Production Date (Y/M/D/L

2

/L

1

)

Figure 10. Markings of CZ-3722

K

L

T

U

V

W

N

P

R

S

X

0

1

2

3

4

Character

B

C

D

E

F

G

H

J

7

8

9

A

Year(Y)

Year

2017

2018

2019

2020

2021

2022

2023

2024

2025

2026

2027

2028

C

D

E

F

G

H

J

K

L

M

N

P

Table 10. Production date code table

Month(M) Day(D)

Character Month

January

February

March

April

May

June

July

August

September

October

November

December

Character

1

2

3

4

5

6

7

8

9

0

A

B

Day

1

2

3

4

5

6

7

8

9

10

11

12

Character

(L

2

)

Lot number

Character

(L

1

)

0

0

0

0

0

1

2

3

4

5

6

6

6

7

7

7

8

9

0

1

2029

2030

2031

2032

2033

2034

2035

2036

2037

2038

2039

2040

2041

2042

2043

2044

C

D

J

K

L

N

E

F

G

H

P

R

S

T

U

V

W

X

Y

13

14

19

20

21

22

15

16

17

18

23

24

25

26

27

28

29

30

31

Lot number

01

02

03

04

05

67

68

69

70

71

[CZ-3722]

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14.

Reliability Tests

Table 11. Test parameters and conditions of reliability tests

No.

Test Parameter

1 Temperature Humidity Bias Test

2

3

High Temperature Bias Test

High Temperature Storage Test

Test Conditions

JEITA EIAJ ED-4701 102

T a

=85

C, 85%RH, continuous operation

JEITA EIAJ ED-4701 101

T a

=150

C, continuous operation

JEITA EIAJ ED-4701 201

T a

=150

C n

22

22

22

Test Time

500h

500h

500h

4 Low Temperature Operating Test

T a

=−40

C, continuous operation

22 500h

5 Heat Cycle Test

JEITA EIAJ ED-4701 105

−65

C to +150

C

30min. 30min.

Tested in vapor phase

22 200 Cycles

Tested samples are pretreated as below before each reliability test:

Desiccation: 125

C/24h → Moisture Absorption: 60

C/60%RH/168h

→ Reflow: 3 times (JEDEC Level2a)

Criteria :

Products whose drifts between before pretreated and after the reliability tests do not exceed the values below are considered to be in spec.

Sensitivity V h

(T a

=25

C) : Within ±1.5%

Zero-Current Output V of

(T a

=25

C) : Within ±25mV

Linearity Error ρ (T a

=25

C)

EEPROM data

: Within ±0.5%F.S.

: Unchanged

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15.

Precautions

<Storage Environment>

Products should be stored at an appropriate temperature, and at as low humidity as possible by using desiccator (5 to 35

°C

). It is recommended to use the products within 4 weeks since packing was opened. Keep products away from chlorine and corrosive gas. When stored in an inappropriate environment, it can affect the product properties.

<Long-term Storage>

Long-term storage may result in poor lead solderability and degraded electrical performance even under proper conditions. For those parts, which stored long-term should be checked as for solderability before it is used.

For storage longer than 1 year, it is recommended to store in nitrogen atmosphere. Oxygen of atmosphere oxidizes leads of products, and lead solderability get worse.

<Other Precautions>

1) This product should not be used under the environment with corrosive gas including chlorine or sulfur.

2) This product is lead (Pb) free. All leads are plated with Sn-Bi. Do not store this product alone in high temperature and high humidity environment. Moreover, this product should be mounted on substrate within six months after delivery.

3) This product is damaged when it is used on the following conditions:

-

Supply voltage is applied in the opposite way.

-

Overvoltage which is larger than the value indicated in the specification.

4) This product will be damaged if it is used for a long time with the current (effective current) which exceeds the current rating. Careful attention must be paid so that maximum effective current is smaller than current rating.

5) The characteristics can be changed by the influences of nearby current and magnetic field and electric field. Please make sure of the mounting position.

As this product contains gallium arsenide, observe the following procedures for safety.

1) Do not alter the form of this product into a gas, powder, liquid, through burning, crushing, or chemical processing.

2) Observe laws and company regulations when discarding this product.

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IMPORTANT NOTICE

0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the information contained in this document without notice. When you consider any use or application of AKM product stipulated in this document (“Product”), please make inquiries the sales office of AKM or authorized distributors as to current status of the Products.

1. All information included in this document are provided only to illustrate the operation and application examples of AKM Products. AKM neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual property rights or any other rights of AKM or any third party with respect to the information in this document. You are fully responsible for use of such information contained in this document in your product design or applications. AKM ASSUMES

NO LIABILITY FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM

THE USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS.

2. The Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality and/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious public impact, including but not limited to, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, devices related to electric power, and equipment used in finance-related fields. Do not use Product for the above use unless specifically agreed by AKM in writing.

3. Though AKM works continually to improve the Product’s quality and reliability, you are responsible for complying with safety standards and for providing adequate designs and safeguards for your hardware, software and systems which minimize risk and avoid situations in which a malfunction or failure of the Product could cause loss of human life, bodily injury or damage to property, including data loss or corruption.

4. Do not use or otherwise make available the Product or related technology or any information contained in this document for any military purposes, including without limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass destruction weapons). When exporting the Products or related technology or any information contained in this document, you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations. The Products and related technology may not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations.

5. Please contact AKM sales representative for details as to environmental matters such as the

RoHS compatibility of the Product. Please use the Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. AKM assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations.

6. Resale of the Product with provisions different from the statement and/or technical features set forth in this document shall immediately void any warranty granted by AKM for the Product and shall not create or extend in any manner whatsoever, any liability of AKM.

7. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent of AKM.

Rev.1

019005456-E-00

-

16 -

2019/6

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