LQW18AN94NJ8ZD [MURATA]
General Purpose Inductor,;
| 型号： | LQW18AN94NJ8ZD |
| 厂家： | 
muRata |
| 描述： | General Purpose Inductor, 测试 射频感应器 电感器 |
| 文件： | 总12页 (文件大小：258K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Reference Only
CHIP COIL (CHIP INDUCTORS) LQW18AN□□□□8ZD
SpecNo.JELF243A-9133-01
P.1/12
Murata Standard Reference Specification 【AEC-Q200】
1.Scope
This reference specification applies to LQW18AN_8ZD series, Chip coil(Chip Inductors) for automotive Electronics
based on AEC-Q200 except for Power train and Safety.
2.Part Numbering
(ex)
LQ
W
18
A
N
2N2
C
8
Z
D
Product ID Structure Dimension Applications Category Inductance Tolerance Features Application
Packaging
(L×W)
and
Z:Automotive D:Taping
Characteristics
3.Rating
・Operating Temperature Range.
–55°C to +125°C
・Storage Temperature Range.
–55°C to +125°C
Self
Rated
DC
Resistance
(Ω max.)
ESD
Rank
6: 25kV
Inductance
Customer
Part Number
MURATA
Part Number
Q
(min.)
Resonant
Current
Frequency
(mA)
(nH)
Tolerance
C:±0.2nH
(MHz min.)
LQW18AN2N2C8ZD
LQW18AN2N4C8ZD
LQW18AN3N0C8ZD
LQW18AN3N9B8ZD
LQW18AN3N9C8ZD
LQW18AN3N9G8ZD
LQW18AN4N1B8ZD
LQW18AN4N1C8ZD
LQW18AN4N1G8ZD
LQW18AN4N2B8ZD
LQW18AN4N2C8ZD
LQW18AN4N2G8ZD
LQW18AN4N3B8ZD
LQW18AN4N3C8ZD
LQW18AN4N3G8ZD
LQW18AN4N7B8ZD
LQW18AN4N7C8ZD
LQW18AN4N7G8ZD
LQW18AN4N9B8ZD
LQW18AN4N9C8ZD
LQW18AN4N9G8ZD
LQW18AN5N6C8ZD
LQW18AN5N6G8ZD
LQW18AN6N0C8ZD
LQW18AN6N0G8ZD
LQW18AN6N5C8ZD
LQW18AN6N5G8ZD
LQW18AN6N8C8ZD
LQW18AN6N8G8ZD
LQW18AN7N2C8ZD
LQW18AN7N2C8ZD
2.2
2.4
3.0
24
18
13
0.018
0.026
0.17
3200
15000
2400
670
3.9
4.1
4.2
4.3
4.7
4.9
30
0.028
10000
2200
B:±0.1nH
C:±0.2nH
G:±2%
35
25
0.036
0.054
0.081
11600
10400
7300
2100
1500
1200
6
23
38
5.6
6
C:±0.2nH
G:±2%
6.5
6.8
7.2
40
38
0.040
6650
1900
C:±0.2nH
G:±2%
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.2/12
Self
Inductance
DC
Rated
Current
(mA)
ESD
Rank
6: 25kV
Customer
MURATA
Q
Resonant
Frequency
(MHz min.)
Resistance
(Ω max.)
Part Number
Part Number
(min.)
(nH)
Tolerance
LQW18AN7N5C8ZD
LQW18AN7N5G8ZD
LQW18AN8N2C8ZD
LQW18AN8N2G8ZD
LQW18AN8N4C8ZD
LQW18AN8N4G8ZD
LQW18AN8N7C8ZD
LQW18AN8N7G8ZD
LQW18AN9N1C8ZD
LQW18AN9N1G8ZD
LQW18AN9N5C8ZD
LQW18AN9N5G8ZD
LQW18AN9N9C8ZD
LQW18AN9N9G8ZD
LQW18AN10NG8ZD
LQW18AN10NJ8ZD
LQW18AN11NG8ZD
LQW18AN11NJ8ZD
LQW18AN12NG8ZD
LQW18AN12NJ8ZD
LQW18AN13NG8ZD
LQW18AN13NJ8ZD
7.5
35
38
40
0.048
7000
1500
8.2
8.4
8.7
9.1
9.5
9.9
10
C:±0.2nH
G:±2%
0.052
4750
1600
11
12
37
38
0.064
5000
1500
13
6
LQW18AN15NG8ZD
LQW18AN15NJ8ZD
15
16
LQW18AN16NG8ZD
LQW18AN16NJ8ZD
LQW18AN17NG8ZD
17
18
19
22
23
24
25
27
28
30
LQW18AN17NJ8ZD
LQW18AN18NG8ZD
LQW18AN18NJ8ZD
LQW18AN19NG8ZD
LQW18AN19NJ8ZD
LQW18AN22NG8ZD
LQW18AN22NJ8ZD
LQW18AN23NG8ZD
LQW18AN23NJ8ZD
LQW18AN24NG8ZD
LQW18AN24NJ8ZD
LQW18AN25NG8ZD
LQW18AN25NJ8ZD
LQW18AN27NG8ZD
LQW18AN27NJ8ZD
LQW18AN28NG8ZD
LQW18AN28NJ8ZD
LQW18AN30NG8ZD
LQW18AN30NJ8ZD
0.075
4600
1400
G:±2%
J:±5%
0.086
3450
1300
40
0.098
0.12
3600
2880
1200
1100
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.3/12
Self
Inductance
DC
Rated
Current
(mA)
ESD
Rank
6: 25kV
Customer
MURATA
Q
Resonant
Frequency
(MHz min.)
Resistance
(Ω max.)
Part Number
Part Number
(min.)
(nH)
Tolerance
LQW18AN31NG8ZD
LQW18AN31NJ8ZD
LQW18AN33NG8ZD
LQW18AN33NJ8ZD
LQW18AN34NG8ZD
LQW18AN34NJ8ZD
LQW18AN36NG8ZD
LQW18AN36NJ8ZD
LQW18AN37NG8ZD
LQW18AN37NJ8ZD
LQW18AN39NG8ZD
LQW18AN39NJ8ZD
LQW18AN41NG8ZD
LQW18AN41NJ8ZD
LQW18AN43NG8ZD
LQW18AN43NJ8ZD
LQW18AN44NG8ZD
LQW18AN44NJ8ZD
LQW18AN47NG8ZD
LQW18AN47NJ8ZD
LQW18AN48NG8ZD
LQW18AN48NJ8ZD
LQW18AN51NG8ZD
LQW18AN51NJ8ZD
LQW18AN52NG8ZD
LQW18AN52NJ8ZD
LQW18AN56NG8ZD
LQW18AN56NJ8ZD
LQW18AN58NG8ZD
LQW18AN58NJ8ZD
LQW18AN68NG8ZD
LQW18AN68NJ8ZD
LQW18AN69NG8ZD
LQW18AN69NJ8ZD
LQW18AN72NG8ZD
LQW18AN72NJ8ZD
LQW18AN73NG8ZD
LQW18AN73NJ8ZD
LQW18AN75NG8ZD
LQW18AN75NJ8ZD
LQW18AN78NG8ZD
LQW18AN78NJ8ZD
LQW18AN82NG8ZD
LQW18AN82NJ8ZD
LQW18AN83NG8ZD
LQW18AN83NJ8ZD
LQW18AN91NG8ZD
LQW18AN91NJ8ZD
31
0.11
0.15
0.20
3150
3000
1100
1050
910
33
34
36
37
39
41
43
44
47
48
51
52
56
58
68
69
72
73
75
78
82
83
91
40
37
0.16
0.21
3280
2780
1000
840
40
32
0.23
2700
830
G:±2%
J:±5%
6
35
38
35
0.27
0.26
0.30
2750
2600
2400
750
770
700
37
34
0.38
0.47
2380
2330
630
560
28
0.41
2280
590
34
33
0.5
2230
1900
550
520
0.54
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.4/12
Self
Inductance
DC
Rated
Current
(mA)
ESD
Rank
6: 25kV
Customer
MURATA
Q
Resonant
Frequency
(MHz min.)
Resistance
(Ω max.)
Part Number
Part Number
(min.)
(nH)
Tolerance
LQW18AN94NG8ZD
LQW18AN94NJ8ZD
LQW18ANR10G8ZD
LQW18ANR10J8ZD
LQW18ANR11G8ZD
LQW18ANR11J8ZD
LQW18ANR12G8ZD
LQW18ANR12J8ZD
LQW18ANR15G8ZD
LQW18ANR15J8ZD
LQW18ANR18G8ZD
LQW18ANR18J8ZD
LQW18ANR20G8ZD
LQW18ANR20J8ZD
LQW18ANR21G8ZD
LQW18ANR21J8ZD
LQW18ANR22G8ZD
LQW18ANR22J8ZD
LQW18ANR25G8ZD
LQW18ANR25J8ZD
LQW18ANR27G8ZD
LQW18ANR27J8ZD
LQW18ANR30G8ZD
LQW18ANR30J8ZD
LQW18ANR33G8ZD
LQW18ANR33J8ZD
LQW18ANR36G8ZD
LQW18ANR36J8ZD
94
34
0.63
1750
490
450
100
110
120
150
180
200
210
220
250
270
300
330
360
390
0.7
1730
1650
1580
1380
1350
32
28
25
0.72
0.87
1.65
1.74
1.98
2.08
2.28
2.42
3.12
3.84
3.98
4.23
420
310
290
G:±2%
J:±5%
27
25
6
280
1330
250
260
220
24
1250
1200
1100
1050
1100
25
190
LQW18ANR39G8ZD
LQW18ANR39J8ZD
100
50
0
0
85
Temperature (℃)
125
.
Derating of Rated Current depend on Operating Temperature
4. Testing Conditions
《Unless otherwise specified》
《In case of doubt》
Temperature : Ordinary Temperature / 15°C to 35°C
Temperature : 20°C±2°C
Humidity : 60%(RH) to 70%(RH)
Atmospheric Pressure : 86kPa to 106 kPa
Humidity
: Ordinary Humidity
/ 25%(RH) to 85%(RH)
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
5. Appearance and Dimensions
1.65 ± 0.1
P.5/12
■Unit Mass (Typical value)
0.0034g
0.90 ± 0.1
0.99 ± 0.1
0.2 ± 0.1
(in mm)
0.26 ± 0.1
6.Electrical Performance
No.
Item
Specification
Inductance shall meet item 3.
Test Method
Measuring Equipment:
Agilent 4287A or equivalent
Measuring Frequency:
<Inductance> 100MHz
<Q> 250MHz/ 2.2nH~44nH
6.1 Inductance
200MHz/ 47nH~69nH
150MHz/ 72nH~150nH
100MHz/ 180nH~390nH
Measuring Condition:
Test signal level / about 10mA
Electrical length / 0.94 cm
Measuring Fixture: Agilent 16197A
Position coil under test as shown in below
and contact coil with each terminal by
adding weight.
6.2
Q
Q shall meet item 3.
1608 Size Guide
Measuring Method:See P.11
<Electrical Performance:Measuring
Method of Inductance/Q>
6.3 DC Resistance
DC Resistance shall meet item 3.
S.R.F shall meet item 3.
Measuring Equipment:Digital multi meter
6.4 Self Resonant
Frequency(S.R.F)
Measuring Equipment:
Agilent 5230A or equivalent
6.5 Rated Current
Self temperature rise shall be
limited to 40°C max.
The rated current is applied.
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.6/12
7. Q200 Requirement
7.1.Performance (based on Table 5 for Magnetics(Inductors / Transformer)
AEC-Q200 Rev.D issued June 1. 2010
AEC-Q200
Murata Specification / Deviation
Meet Table A after testing.
No
3
Stress
Test Method
1000hours at 125 deg C
Set for 24hours at room
temperature, then
measured.
High
Temperature
Exposure
Table A
Appearance
No damage
Inductance
(at 100MHz)
Within ±5％
4
Temperature
Cycling
1000cycles
Meet Table A after testing.
-40 deg C to +125 deg C
Set for 24hours at room
temperature,then
measured.
7
8
Biased Humidity 1000hours at 85 deg C,
Meet Table A after testing.
Meet Table A after testing.
85%RH
unpowered..
Operational Life Apply Rated Current 125
deg C 1000hours
Set for 24hours at room
temperature, then
measured
9
External Visual
Visual inspection
No abnormalities
No defects
10 Physical
Dimension
Meet ITEM 4
（Style and Dimensions）
12 Resistance
to Solvents
Per
MIL-STD-202
Method 215
Not Applicable
13 Mechanical
Shock
Per MIL-STD-202
Method 213
Meet Table A after testing.
Condition C : 100g’s(0.98N),
6ms, Half sine, 12.3ft/s
14 Vibration
5g's(0.049N) for 20 minutes, Meet Table A after testing.
12cycles each of 3
orientations
Test from 10-2000Hz.
15 Resistance
to Soldering
Heat
No-heating
Pre-heating: 150C +/-10 deg C, 60s to 90s
Meet Table A after testing.
Solder temperature
260C+/-5 deg C
Immersion time 10s
17 ESD
Per AEC-Q200-002
Per J-STD-002
ESD Rank: Refer to Item 3. Rating.
Meet Table A after testing.
18 Solderbility
Method b : Not Applicable
95% of the terminations is to be soldered.
(Except exposed wire)
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.7/12
AEC-Q200
Murata Specification / Deviation
No
19 Electrical
Characterization
Stress
Test Method
Measured : Inductance
No defects
20 Flammability
21 Board Flex
Per UL-94
Not Applicable
Epoxy-PCB(1.6mm)
Deflection 2mm(min)
Holding time 60s
Meet Table B after testing.
Table B
Appearance
No damage
DC resistance
change
Within ±10％
22 Terminal Strength Per AEC-Q200-006
Murata Deviation Request: 10N/5s
No defect
A force of 17.7N
for 60s
8.Specification of Packaging
8.1 Appearance and Dimensions of paper tape (8mm-wide)
2.0±0.05
4.0±0.1
1.5±0.1
0
1.75±0.1
φ
4.0±0.1
1.1±0.05
(in mm)
Direction of feed
1.1max
１．１５±０．０５
8.2 Specification of Taping
(1) Packing quantity (standard quantity)
4,000 pcs. / reel
(2) Packing Method
Products shall be packed in the cavity of the base tape and sealed by top tape and bottom tape.
(3) Sprocket hole
The sprocket holes are to the right as the tape is pulled toward the user.
(4) Spliced point
Base tape and Top tape has no spliced point.
(5) Missing components number
Missing components number within 0.1 % of the number per reel or 1 pc., whichever is greater,
and are not continuous. The Specified quantity per reel is kept.
8.3 Pull Strength
Top tape
5N min.
Bottom tape
8.4 Peeling off force of cover tape
Top tape
165 to 180 degree
Bottom tape
F
Speed of Peeling off
300mm/min
0.1N to 0.6N
(minimum value is typical)
Peeling off force
Base tape
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.8/12
8.5 Dimensions of Leader-tape,Trailer and Reel
There shall be leader-tape ( top tape and empty tape) and trailer-tape (empty tape) as follows.
Trailer
160 min.
Leader
2.0±0.5
Label
190 min.
210 min.
Empty tape
Top tape
13.0±0.2
φ
60+1
φ
-
0
Direction of feed
21.0±0.8
φ
+1
-0
9.0
(in mm)
13.0±1.4
180 +0
φ
-3
8.6 Marking for reel
Customer part number, MURATA part number, Inspection number(∗1) ,RoHS Marking (∗2),
Quantity etc ･･･
∗1) <Expression of Inspection No.>
□□ OOOO ×××
(1)
(2)
(3)
(1) Factory code
(2) Date
First digit: Year / Last digit of year
Second digit: Month / Jan. to Sep. → 1 to 9, Oct. to Dec. → O, N, D
Third, Fourth digit : Day
(3) Serial No.
∗2) <Expression of RoHS Marking >
ROHS – Y (△)
(1) (2)
(1) RoHS regulation conformity parts.
(2) MURATA classification number
8.7 Marking for Outside package (corrugated paper box)
Customer name, Purchasing order number, Customer part number, MURATA part number,
RoHS Marking (∗2) ,Quantity, etc ･･･
8.8. Specification of Outer Case
Outer Case Dimensions
(mm)
Standard Reel Quantity
in Outer Case (Reel)
Label
W
D
H
H
186
186
93
5
D
W
∗ Above Outer Case size is typical. It depends on a quantity of an order.
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.9/12
9. ！ Caution
9.1 Rating
Do not exceed maximum rated current of the product. Thermal stress may be transmitted to the product and
short/open circuit of the product or falling off the product may be occurred.
9.2 Surge current
Excessive surge current (pulse current or rush current) than specified rated current applied to the product may
cause a critical failure, such as an open circuit, burnout caused by excessive temperature rise.
Please contact us in advance in case of applying the surge current.
9.3 Fail-safe
Be sure to provide an appropriate fail-safe function on your product to prevent a second damage that may be
caused by the abnormal function or the failure of our product.
9.4 Limitation of Applications
Please contact us before using our products for the applications listed below which require especially
high reliability for the prevention of defects which might directly cause damage to the third party's life,
body or property.
(1) Aircraft equipment
(6) Transportation equipment (trains, ships, etc.)
(7) Traffic signal equipment
(8) Disaster prevention / crime prevention equipment
(9) Data-processing equipment
(10) Applications of similar complexity and /or reliability
requirements to the applications listed in the above
(2) Aerospace equipment
(3) Undersea equipment
(4) Power plant control equipment
(5) Medical equipment
10. Notice
Products can only be soldered with reflow.
This product is designed for solder mounting.
Please consult us in advance for applying other mounting method such as conductive adhesive.
10.1 Land pattern designing
Recommended land patterns for reflow soldering are as follows:
These have been designed for Electric characteristics and solderability.
Please follow the recommended patterns. Otherwise, their performance which includes electrical performance
or solderability may be affected, or result to "position shift" in soldering process.
Chip Coil
Land
c
Solder resist
a
b
c
0.86
2.00
1.15
a
(in mm)
b
10.2 Flux, Solder
・Use rosin-based flux.
Includes middle activator equivalent to 0.06(wt)% to 0.1(wt)% Chlorine.
Don’t use highly acidic flux with halide content exceeding 0.2(wt)% (chlorine conversion value).
Don’t use water-soluble flux.
・Use Sn-3.0Ag-0.5Cu solder.
・Standard thickness of solder paste : 100μm to 150μm.
10.3 Reflow soldering conditions
・Pre-heating should be in such a way that the temperature difference between solder and product
surface is limited to 150°C max. Cooling into solvent after soldering also should be in such a way that
the temperature difference is limited to 100°C max.
Insufficient pre-heating may cause cracks on the product, resulting in the deterioration of products quality.
・Standard soldering profile and the limit soldering profile is as follows.
The excessive limit soldering conditions may cause leaching of the electrode and / or resulting
in the deterioration of product quality.
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
・Reflow soldering profile
P.10/12
Temp.
(℃)
260℃
245℃±3℃
230℃
220℃
Limit Profile
180
150
Standard Profile
30s～60s
60s max.
90s±30s
Time.(s)
Standard Profile
Limit Profile
Pre-heating
150°C～180°C 、90s±30s
Heating
above 220°C､30s～60s
245°C±3°C
above 230°C､60s max.
260°C,10s
Peak temperature
Cycle of reflow
2 times
2 times
10.4 Reworking with soldering iron
The following conditions must be strictly followed when using a soldering iron.
Pre-heating
150°C,1 min
350°C max.
80W max.
φ3mm max.
3(+1,-0)s
Tip temperature
Soldering iron output
Tip diameter
Soldering time
Time
2 times
Note :Do not directly touch the products with the tip of the soldering iron in order to prevent the
crack on the products due to the thermal shock.
10.5 Solder Volume
・Solder shall be used not to be exceeded the upper limits as shown below.
・Accordingly increasing the solder volume, the mechanical stress to Chip is also increased.
Exceeding solder volume may cause the failure of mechanical or electrical performance.
Upper Limit
1/3T≦t≦T
Recommendable(t)
T
T：thickness of product
10.6 Product’s location
The following shall be considered when designing and laying out P.C.B.'s.
(1) P.C.B. shall be designed so that products are not subject to the mechanical stress due to
warping the board.
［Products direction］
a
Products shall be located in the sideways
direction (Length:a＜b) to the mechanical
b
stress.
Poor example
〈
〉
Good example
〈
〉
(2) Products location on P.C.B. separation
C
Products (A,B,C,D) shall be located carefully
so that products are not subject to the
mechanical stress due to warping the board.
Because they may be subjected the mechanical
stress in order of A＞C＞B ≅ D.
B
Seam
D
A
a
b
Slit
Length:a b
<
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.11/12
10.7 Cleaning Conditions
Products shall be cleaned on the following conditions.
(1) Cleaning temperature shall be limited to 60°C max.(40°C max for IPA)
(2) Ultrasonic cleaning shall comply with the following conditions with avoiding the resonance
phenomenon at the mounted products and P.C.B.
Power : 20 W / l max.
(3) Cleaner
Frequency : 28kHz to 40kHz
Time : 5 min max.
1. Alcohol type cleaner
Isopropyl alcohol (IPA)
2. Aqueous agent
PINE ALPHA ST-100S
(4) There shall be no residual flux and residual cleaner after cleaning.
In the case of using aqueous agent, products shall be dried completely after rinse with de-ionized
water in order to remove the cleaner.
(5) Other cleaning
Please contact us.
10.8 Resin coating
The inductance value may change due to high cure-stress of resin to be used for coating/molding products.
An open circuit issue may occur by mechanical stress caused by the resin, amount/cured shape of resin, or
operating condition etc. Some resin contains some impurities or chloride possible to generate chlorine by
hydrolysis under some operating condition may cause corrosion of wire of coil, leading to open circuit.
So, please pay your careful attention in when you select resin in case of coating/molding the products
with the resin.
Prior to use the coating resin, please make sure no reliability issue is observed by evaluating products
mounted on your board.
10.9 Caution for use
・Sharp material such as a pair of tweezers or other material such as bristles of cleaning brush , shall not be touched to
the winding portion to prevent the breaking of wire.
・Mechanical shock should not be applied to the products mounted on the board to prevent the breaking of the core.
10.10 Notice of product handling at mounting
In some mounting machines,when picking up components support pin pushes up the components from the
bottom of base tape. In this case, please remove the support pin. The support pin may damage the components
and break wire.
In rare case ,the laser recognition can not recognize this component. Please contact us when you use laser
recognition. (There is no problem with the permeation and reflection type.)
10.11 Handling of a substrate
After mounting products on a substrate, do not apply any stress to the product caused by bending or twisting to the
substrate when cropping the substrate, inserting and removing a connector from the substrate or tightening screw
to the substrate.
Excessive mechanical stress may cause cracking in the product.
Bending
Twisting
MURATA MFG.CO., LTD
Reference Only
SpecNo.JELF243A-9133-01
P.12/12
10.12 Storage and Handing Requirements
(1) Storage period
Use the products within 12 months after delivered.
Solderability should be checked if this period is exceeded.
(2) Storage conditions
・Products should be stored in the warehouse on the following conditions.
Temperature ： -10°C to 40°C
Humidity
： 15% to 85% relative humidity No rapid change on temperature and humidity
・Don't keep products in corrosive gases such as sulfur,chlorine gas or acid, or it may cause
oxidization of electrode, resulting in poor solderability.
・Products should not be stored on bulk packaging condition to prevent the chipping of the
core and the breaking of winding wire caused by the collision between the products.
・Products should be stored on the palette for the prevention of the influence from humidity,
dust and so on.
・Products should be stored in the warehouse without heat shock, vibration, direct sunlight and so on.
(3) Handling Condition
Care should be taken when transporting or handling product to avoid excessive vibration or
mechanical shock.
11. ! Note
(1)Please make sure that your product has been evaluated in view of your specifications with our product being
mounted to your product.
(2)You are requested not to use our product deviating from the reference specifications.
(3)The contents of this reference specification are subject to change without advance notice.
Please approve our product specifications or transact the approval sheet for product specifications
before ordering.
<Electrical Performance:Measuring Method of Inductance / Q>
(1) Residual elements and stray elements of test fixture can be described by F-parameter shown in following.
2
1
I
I
A
C
B
D
A
C
B
D
V1
I1
V2
I 2
=
Zx
Zm
V
2
V
1
Test Head
Test fixture
Product
(2) The impedance of chip coil Zx and measured value Zm can be described by input/output current/voltage.
V1
I 1
V2
I 2
Zm=
，
Zx=
(3) Thus,the relation between Zx and Zm is following;
Zm-β
where, α= D / A =1
Zx= α
1-ZmΓ
β= B / D =Zsm-(1-Yom Zsm)Zss
Γ= C / A =Yom
Zsm : measured impedance of short chip
Zssa: residual impedance of short chip (0.771nH)
Yom: measured admittance when opening the fixture
(4) Lx shall be calculated with the following equation.
Im(Zx)
Im(Zx)
Re(Zx)
Lx : Inductance of chip coil
Qx : Q of chip coil
Lx=
,
Qx =
2πf
f
: Measuring frequency
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