Approval sheet
WA04P
π
type chip attenuator
50Ω, 1dB to 10dB
Size 0402x2
*Contents in this sheet are subject to change without prior notice.
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ASC_WA04P_V13
May.2011
Approval sheet
FEATURE
1. Unbalanced
π
type attenuator circuit in one chip (1.0mm x 1.0mm)
2. Mounting occupation area reduction
3. Mounting assembly cost saving
APPLICATION
•
•
•
Attenuation, level control, impedance matching of high frequency signals of communication equipment;
Mobile phone (GSM, CDMA, PDC, etc,…)
Telecom
DESCRIPTION
The attenuator is constructed in a high grade ceramic body (aluminum oxide). Internal circuit is applied to the top
surface of the substrate, and its design determines the required attenuation value. The attenuation layer is
covered with a protective coating and a rectangular marker indicates input pin1 as shown in circuit configuration.
Fig 1. Outline of WA04P Chip attenuator
CIRCUIT CONFIGURATION
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ASC_WA04P_V13
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Approval sheet
QUICK REFERENCE DATA
Item
Series No.
Size
Attenuation Range
Attenuation Tolerance
1dB ~ 5dB
6dB ~ 10dB
Characteristic impedance
Rated power at T
amb
=70°C
Limiting voltage (DC)
Frequency range (DC)
VSWR (Voltage Standing Wave Ratio)
Number of Resistors
Number of Terminals
Climatic category (IEC60068)
±0.3dB
±0.5dB
50Ω
0.04 W / package
50V
Max. 2.2 GHz
Max. 1.3
3 resistors
4 terminals
55/155/56
General Specification
WA04P(Convex type)
0402x2 (1005x2)
1dB, 2dB, 3dB, 4dB, 5dB, 6dB, 7dB, 8dB, 9dB, 10dB
DIMENSIONS(mm)
WA04P
L
W
T
P
A
Ta
Tb
1.00
±
0.10
1.00 +0.10 / -0
0.35
±
0.10
0.65
±
0.10
0.33
±
0.10
0.15
±
0.10
0.25
±
0.10
MARKING
No marking for WA04P chip attenuator
FUNCTIONAL DESCRIPTION
Product characterization
Standard attenuation values include 1dB to 5dB with a tolerance of
±0.3dB,
6dB to 10dB with a tolerance of
±0.5dB.
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ASC_WA04P_V13
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Approval sheet
CATALOGUE NUMBERS AND PACKAGING
The attenuators have a catalogue number starting with .
WA04
Size code
WA04 : 0402 per
element
P
Type code
P : convex,
π
type
attenuator
001
Attenuation code
001 = 1dB
002 = 2dB
003 = 3dB
004 = 4dB
005 = 5dB
006 = 6dB
007 = 7dB
008 = 8dB
009 = 9dB
010 = 10dB
X
Impedance
X : 50Ω
B
Tolerance
A :
±0.2dB
B :
±0.3dB
C :
±0.5dB
D :
±1.0dB
T
Packaging code
T : 7” reel taped
L
Termination code
L
=
Sn base (lead
free)
Packaging : 8mm width paper taping 10,000pcs per reel.
MOUNTING
Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by
automatic placement systems.
Chip placement can be on ceramic substrates and printed-circuit boards (PCBs).
Electrical connection to the circuit is by individual soldering condition.
The end terminations guarantee a reliable contact.
SOLDERING CONDITION
The robust construction of chip resistors
allows them to be completely immersed in a
solder bath of 260°C for 10 seconds.
Therefore, it is possible to mount Surface
Mount Resistors on one side of a PCB and
other discrete components on the reverse
(mixed PCBs).
Surface Mount Resistors are tested for
solderability at 235°C during 2 seconds. The
test condition for no leaching is 260°C for 30
seconds. Typical examples of soldering
processes that provide reliable joints without
any damage are given in Fig 3.
Fig 3. Infrared soldering profile
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Approval sheet
TEST AND REQUIREMENTS (JIS C 5201-1 : 1998)
TEST
Characteristic
Impedance
Measuring circuit
PROCEDURE
50Ω
REQUIREMENT
Insulation
resistance
Clause 4.6
Solderability
Clause 4.17
Resistance to
soldering
heat(R.S.H)
Clause 4.18
Apply the 50VDC for 1minute
At least 100MΩ
Un-mounted chips completely immersed for 2±0.5 second in a SAC good tinning (>95% covered)
solder bath at 235℃±5℃
no visible damage
Un-mounted chips completely immersed for 10±1 second in a SAC no visible damage
solder bath at 260℃±5ºC
Attenuation 1~ 2dB : within
±0.1dB
Attenuation 3~ 5dB : within
±0.2dB
Attenuation 6~ 10dB : within
±0.3dB
Temperature
cycling
Clause 4.19
Load life
(endurance)
Clause 4.25
30 minutes at -55°C±3°C, 2~3 minutes at 20°
C+5°
C-1° 30
C,
minutes at +155°C±3°C, 2~3 minutes at 20°
C+5°
C-1° total
C,
5 continuous cycles
Ditto
1000 +48/-0 hours, loaded with RCWV or Vmax in chamber Ditto
controller 70±2ºC, 1.5 hours on and 0.5 hours off
Dielectric Withstand Apply the maximum overload voltage (AC) for 1 minute
Voltage
Clause 4.7
No breakdown or flashover
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