Approval sheet
WA04P
π
type chip attenuator
50Ω, 0dB, 0.5dB to 20dB
Size 1.0 x 1.0 mm
Page 1 of 6
ASC_WA04P_V14
Feb. 2012
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
Page 2 of 6
ASC_WA04P_V14
Feb. 2012
Approval sheet
QUICK REFERENCE DATA
Item
Series No.
Size
Attenuation Range
Attenuation Tolerance
0dB
0.5 dB
1dB ~ 5dB
6dB ~ 10dB
11dB ~ 13dB
14dB
15 ~ 16dB
17 ~ 19dB
20dB
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
category temperature range
-
±0.1dB
±0.3dB
±0.4dB
±0.8dB
±1.0dB
±1.5dB
±2.0dB
±2.5dB
50Ω
0.1 W / package
50V
Max. 3GHz
Max. 1.2
3 resistors
4 terminals
-40 ~ +125
General Specification
WA04P(Convex type)
1.0 x 1.0 mm
0dB, 0.5 dB ~ 20dB
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
Page 3 of 6
ASC_WA04P_V14
Feb. 2012
Approval sheet
code
0
0
X
0
.
5
1
1
Y
1
.
5
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
A
1
0
B
1
1
C
1
2
D
1
3
E
1
4
F
1
5
G
1
6
H
1
7
J
1
8
K
1
9
L
2
0
dB
FUNCTIONAL DESCRIPTION
Product characterization
Standard attenuation values include 0, 0.5dB to 20dB with a tolerance as defined in quick reference data.
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
000 = 0dB
001 = 1dB
005 = 5dB
010 = 10dB
020 = 20dB
R05 = 0.5dB
R15 = 1.5dB
X
Impedance
X : 50Ω
B
Tolerance
A :
±0.1dB
B :
±0.3dB
C :
±0.4dB
D :
±0.8dB
E :
±1.0dB
F :
±1.5dB
G :
±2.0dB
H :
±2.5dB
P :-
T
Packaging code
T : 7” reel taped
L
Termination code
L
=
Sn base
(lead free)
Packaging : 8mm width paper taping 10,000pcs per reel.
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
Page 4 of 6
ASC_WA04P_V14
Feb. 2012
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 0.5~ 2dB : within
±0.1dB
Attenuation 3~ 5dB : within
±0.2dB
Attenuation 6~ 20dB : within
±0.3dB
Temperature
cycling
Clause 4.19
30 minutes at -55°C±3°C, 2~3 minutes at 20°
C+5°
C-1° 30
C,
minutes at +125°C±3°C, 2~3 minutes at 20°
C+5°
C-1° total
C,
5 continuous cycles
no visible damage
Attenuation 0.5~ 2dB : within
±0.1dB
Attenuation 3~ 5dB : within
±0.2dB
Attenuation 6~ 20dB : within
±0.3dB
Load life
(endurance)
Clause 4.25
1000 +48/-0 hours, loaded with RCWV or Vmax in chamber no visible damage
controller 85±2ºC, 1.5 hours on and 0.5 hours off
Attenuation 0.5~ 2dB : within
±0.1dB
Attenuation 3~ 5dB : within
±0.2dB
Attenuation 6~ 20dB : within
±0.3dB
Dielectric Withstand Apply the maximum overload voltage (AC) for 1 minute
Voltage
Clause 4.7
No breakdown or flashover
Page 5 of 6
ASC_WA04P_V14
Feb. 2012
