Accu-L
®
SMD High-Q RF Inductor
2
10 nH Inductor (Top View)
ACCU-L
®
TECHNOLOGY
The Accu-L
®
SMD Inductor is based on thin-film multilayer
technology. This technology provides a level of control on the
electrical and physical characteristics of the component which
gives consistent characteristics within a lot and lot-to-lot.
The original design provides small size, excellent high-
frequency performance and rugged construction for reliable
automatic assembly.
The Accu-L
®
inductor is particularly suited for the telecom-
munications industry where there is a continuing trend
towards miniaturization and increasing frequencies. The
Accu-L
®
inductor meets both the performance and tolerance
requirements of present cellular frequencies 450MHz and
900MHz and of future frequencies, such as 1700MHz,
1900MHz and 2400MHz.
FEATURES
• High Q
• RF Power Capability
• High SRF
• Low DC Resistance
• Ultra-Tight Tolerance on Inductance
• Standard 0603 and 0805 Chip Size
• Low Profile
• Rugged Construction
• Taped and Reeled
APPLICATIONS
• Mobile Communications
• Satellite TV Receivers
• GPS
• Vehicle Locations Systems
• Filters
• Matching Networks
DIMENSIONS:
millimeters (inches)
B
0603
L
1.6±0.10
(0.063±0.004)
0.81±0.10
(0.032±0.004)
0.61±0.10
(0.024±0.004)
top:
0.0 +0.3/-0.0
(0.0+0.012)
bottom:
0.35±0.20
(0.014±0.008)
0805
2.11±0.10
(0.083±0.004)
1.5±0.10
(0.059±0.004)
0.91±0.13
(0.036±0.005)
0.25±0.15
(0.010±0.006)
Operating/Storage
Temp. Range:
-55°C to +125°C
W
W
T
T
L
B
28
Accu-L
®
0603 and 0805
SMD High-Q RF Inductor
HOW TO ORDER
L
Product
Inductor
0805
Size
0603
0805
4R7
Inductance
Expressed in nH
(2 significant digits +
number of zeros)
D
Tolerance
for
L
≤
4.7nH,
B = ±0.1nH
C = ±0.2nH
D = ±0.5nH
E
Specification
Code
E = Accu-L
®
0805
technology
G = Accu-L
®
0603
technology
S
Termination
Code
W = Nickel/
solder coated
(Sn 63, Pb 37)
**S
= Nickel/
Lead Free
Solder coated
(Sn100)
**RoHS compliant
TR
Packaging
Code
TR = Tape and Reel
(3,000/reel)
for
values <10nH,
Not RoHS Compliant
letter R denotes
decimal point.
Example:
22nH = 220
4.7nH = 4R7
4.7nH<L<10nH,
C = ±0.2nH
D = ±0.5nH
L ≥ 10nH,
G = ±2%
J = ±5%
LEAD-FREE COMPATIBLE
COMPONENT
2
For RoHS compliant products,
please select correct termination style.
Engineering Kits Available
see pages 90-91
ELECTRICAL SPECIFICATIONS TABLE FOR ACCU-L
®
0603
Inductance
L (nH)
1.2
1.5
1.8
2.2
2.7
3.3
3.9
4.7
5.6
6.8
8.2
10.0
12.0
15.0
Inductance Tolerance
±0.1, ±0.2nH
±0.1, ±0.2nH
±0.1, ±0.2nH
±0.1, ±0.2nH
±0.1, ±0.2nH
±0.1, ±0.2, ±0.5nH
±0.1, ±0.2, ±0.5nH
±0.1, ±0.2, ±0.5nH
±0.2, ±0.5nH
±0.2, ±0.5nH
±0.2, ±0.5nH
±2%, ±5%
±2%, ±5%
±2%, ±5%
450 MHz
Test Frequency
Available
900 MHz
Test Frequency
Q
Typical
49
26
20
20
21
24
25
23
26
23
23
28
28
28
1900 MHz
Test Frequency
L (nH)
1.2
1.52
1.73
2.24
2.75
3.39
4.06
4.92
5.94
7.3
10
11.8
14.1
25.9
2400 MHz
Test Frequency
L (nH)
1.2
1.52
1.72
2.24
2.79
3.47
4.21
5.2
6.23
8.1
12.1
14.1
17.2
49.8
L (nH)
1.2
1.54
1.74
2.2
2.7
3.33
3.9
4.68
5.65
6.9
8.4
10
13.2
16.2
Q
Typical
70
39
30
30
30
35
57
32
36
33
31
39
38
38
Q
Typical
134
63
50
49
48
56
60
46
54
47
35
47
30
30
Q
Typical
170
76
59
56
54
64
69
49
60
39
31
41
20
15
SRF min
(MHz)
10000
10000
10000
10000
9000
8400
6500
5500
5000
4500
3800
3500
3000
2500
R
DC
max
(Ω)
0.04
0.06
0.07
0.08
0.08
0.08
0.12
0.15
0.25
0.30
0.35
0.45
0.50
0.60
I
DC
max
(mA)
(1)
1000
1000
1000
1000
750
750
500
500
300
300
300
300
300
300
(1)
IDC measured for 15°C rise at 25°C ambient temperature when soldered to FR-4 board.
Inductance and Q measured on Agilent 4291B / 4287 using the 16196A test fixture.
ELECTRICAL SPECIFICATIONS TABLE FOR ACCU-L
®
0805
Inductance
L (nH)
1.2
1.5
1.8
2.2
2.7
3.3
3.9
4.7
5.6
6.8
8.2
10
12
15
18
22
Inductance Tolerance
±0.1nH, ±0.2nH, ±0.5nH
±0.1nH, ±0.2nH, ±0.5nH
±0.1nH, ±0.2nH, ±0.5nH
±0.1nH, ±0.2nH, ±0.5nH
±0.1nH, ±0.2nH, ±0.5nH
±0.1nH, ±0.2nH, ±0.5nH
±0.1nH, ±0.2nH, ±0.5nH
±0.1nH, ±0.2nH, ±0.5nH
±0.5nH
±0.5nH
±0.5nH
±2%, ±5%
±2%, ±5%
±2%, ±5%
±2%, ±5%
±2%, ±5%
450 MHz
Test Frequency
Available
900 MHz
1700 MHz
2400 MHz
Test Frequency Test Frequency Test Frequency
Q
Typical
60
50
50
42
42
38
27
43
50
43
43
46
40
36
30
36
L (nH)
1.2
1.5
1.8
2.2
2.7
3.3
3.9
4.8
5.7
7.0
8.5
10.6
12.9
16.7
21.9
27.5
Q
Typical
92
74
72
62
62
46
36
62
68
62
56
60
50
46
27
33
L (nH)
1.2
1.5
1.8
2.2
2.8
3.4
4.0
5.3
6.3
7.7
10.0
13.4
17.3
27
–
–
Q
Typical
122
102
88
82
80
48
38
76
73
71
55
52
40
23
–
–
L (nH)
1.2
1.5
1.9
2.3
2.9
3.5
4.1
5.8
7.6
9.4
15.2
–
–
–
–
–
Q
Typical
92
84
73
72
70
57
42
60
62
50
32
–
–
–
–
–
SRF min
(MHz)
10000
10000
10000
10000
10000
10000
10000
5500
4600
4500
3500
2500
2400
2200
1700
1400
R
DC
max
ΔT
= 15°C
(Ω)
(1)
0.05
0.05
0.06
0.07
0.08
0.11
0.20
0.10
0.10
0.11
0.12
0.13
0.20
0.20
0.35
0.40
1000
1000
1000
1000
1000
750
750
750
750
750
750
750
750
750
500
500
I
DC
max
(mA)
ΔT
= 70°C
(2)
2000
2000
2000
2000
2000
1500
1500
1500
1500
1500
1500
1500
1500
1000
1000
1000
(1) I
DC
measured for 15°C rise at 25°C ambient temperature
(2) I
DC
measured for 70°C rise at 25°C ambient temperature
L, Q, SRF measured on HP 4291A, Boonton 34A and Wiltron 360
Vector Analyzer, R
DC
measured on Keithley 580 micro-ohmmeter.
29
Accu-L
®
0603 and 0805
SMD High-Q RF Inductor
L0603
180
160
140
120
Q 100
80
60
40
20
0
Typical Q vs. Frequency
L0603
1.2nH
100
Typical Inductance vs. Frequency
L0603
15nH
L (nH)
1.5nH
5.6nH
8.2nH
15nH
0
1
Frequency (GHz)
2
3
10
2
L0805
1
0
0.5
2
1
1.5
Frequency (GHz)
8.2nH
6.8nH
4.7nH
3.3nH
2.2nH
1.8nH
1.2nH
2.5
3
Measured on AGILENT 4291B/4287
using the 16196A test fixture
Measured on AGILENT 4291B/4287
using the 16196A test fixture
Typical Q vs. Frequency
L0805
140
Typical Inductance vs. Frequency
L0805
120
100
1.2nH
100
80
Q
1.8nH
Inductance (nH)
1.5nH
22nH
15nH
60
5.6nH
10
10nH
5.6nH
10nH
40
15nH
20
22nH
1.8nH
1
0
0.1
1
Frequency (GHz)
10
0.01
0.1
1
10
Frequency (GHz)
Measured on HP4291A and
Boonton 34A Coaxial Line
Measured on HP4291A and
Wiltron 360 Vector Analyzer
Maximum Temperature Rise
at 25°C ambient temperature (on FR-4)
L0805
200
100
15nH
10nH
6.8nH 4.7nH
2.7nH
ΔT
(°C)
10
1
0
0.5
1
1.5
2
Current (A)
2.5
3
3.5
Temperature rise will typically be no higher than shown by the graph
30
Accu-L
®
0603 and 0805
SMD High-Q RF Inductor
FINAL QUALITY INSPECTION
Finished parts are tested for electrical parameters and visual/
mechanical characteristics.
Parts are 100% tested for inductance at 450MHz. Parts are
100% tested for R
DC
. Each production lot is evaluated on a
sample basis for:
• Q at test frequency
• Static Humidity Resistance: 85°C, 85% RH, 160 hours
• Endurance: 125°C, I
R
, 4 hours
2
ENVIRONMENTAL CHARACTERISTICS
TEST
Solderability
Leach Resistance
CONDITIONS
Components completely immersed in
a solder bath at 235 ± 5°C for 2 secs.
Components completely immersed in
a solder bath at 260 ±5°C for 60 secs.
12 months minimum with components
stored in “as received” packaging.
Components mounted to a substrate.
A force of 5N applied normal to the
line joining the terminations and in
a line parallel to the substrate.
Components mounted to a substrate.
5 cycles -55°C to +125°C.
Tested as shown in diagram
1mm
deflection
45mm
45mm
Storage
Shear
REQUIREMENT
Terminations to be well tinned.
No visible damage.
Dissolution of termination faces
≤ 15% of area.
Dissolution of termination edges
≤ 25% of length.
Good solderability
No visible damage
Rapid Change of
Temperature
Bend Strength
No visible damage
No visible damage
Temperature
Coefficient of
Inductance
(TCL)
Component placed in
environmental chamber
-55°C to +125°C.
+0 to +125 ppm/°C
6
L
2
-L
1
TCL =
• 10
(typical)
L
1
(T
2
-T
1
)
T
1
= 25°C
31
Accu-L
®
0805
Application Notes
HANDLING
SMD chips should be handled with care to avoid damage or
contamination from perspiration and skin oils. The use of
plastic tipped tweezers or vacuum pick-ups is strongly
recommended for individual components. Bulk handling
should ensure that abrasion and mechanical shock are min-
imized. For automatic equipment, taped and reeled product
is the ideal medium for direct presentation to the placement
machine.
PREHEAT & SOLDERING
The rate of preheat in production should not exceed
4°C/second. It is recommended not to exceed 2°C/
second.
Temperature differential from preheat to soldering should not
exceed 150°C.
For further specific application or process advice, please
consult AVX.
CIRCUIT BOARD TYPE
HAND SOLDERING & REWORK
Hand soldering is permissible. Preheat of the PCB to 100°C
is required. The most preferable technique is to use hot air
soldering tools. Where a soldering iron is used, a tempera-
ture controlled model not exceeding 30 watts should be
used and set to not more than 260°C. Maximum allowed
time at temperature is 1 minute. When hand soldering, the
base side (white side) must be soldered to the board.
2
All flexible types of circuit boards may be used (e.g. FR-4,
G-10) and also alumina.
For other circuit board materials, please consult factory.
COMPONENT PAD DESIGN
Component pads must be designed to achieve good joints
and minimize component movement during soldering.
Pad designs are given below for both wave and reflow
soldering.
The basis of these designs is:
a. Pad width equal to component width. It is permissible
to decrease this to as low as 85% of component width
but it is not advisable to go below this.
b. Pad overlap about 0.3mm.
c. Pad extension about 0.3mm for reflow.
Pad extension about 0.8mm for wave soldering.
COOLING
After soldering, the assembly should preferably be allowed to
cool naturally. In the event of assisted cooling, similar condi-
tions to those recommended for preheating should be used.
CLEANING RECOMMENDATIONS
Care should be taken to ensure that the devices are thor-
oughly cleaned of flux residues, especially the space beneath
the device. Such residues may otherwise become conduc-
tive and effectively offer a lossy bypass to the device. Various
recommended cleaning conditions (which must be optimized
for the flux system being used) are as follows:
Cleaning liquids . . . . . . i-propanol, ethanol, acetylace-
tone, water, and other standard
PCB cleaning liquids.
Ultrasonic conditions . . power – 20w/liter max.
frequency – 20kHz to 45kHz.
Temperature . . . . . . . . . 80°C maximum (if not otherwise
limited by chosen solvent system).
Time. . . . . . . . . . . . . . . 5 minutes max.
WAVE SOLDERING
DIMENSIONS:
millimeters (inches)
1.30
(0.051)
1.2
(0.047)
3.1
(0.122)
0.50
(0.020)
1.4
3.8
(0.150) (0.055)
1.30
(0.051)
0.8
(0.031)
0603
Accu-L
®
1.2
(0.047)
0805
Accu-L
®
1.5
(0.059)
STORAGE CONDITIONS
Recommended storage conditions for Accu-L
®
prior to use
are as follows:
Temperature. . . . . . . . . 15°C to 35°C
Humidity . . . . . . . . . . . ≤65%
Air Pressure . . . . . . . . . 860mbar to 1060mbar
REFLOW SOLDERING
DIMENSIONS:
millimeters (inches)
0.90
(0.035)
2.3
(0.091)
0.7
(0.028)
0.50
(0.020)
2.8
1.4
(0.110) (0.055)
0.90
(0.035)
0.8
(0.031)
0603
Accu-L
®
0.7
(0.028)
0805
Accu-L
®
1.5
(0.059)
RECOMMENDED SOLDERING
PROFILE
For recommended soldering profile see page 23
32
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