SMD Chip Attenuator
The content of this specification may change without notification 08/28/2008
Custom solutions are available.
AAC
AT series high performance 0402, 0805,
1206, and 1612 size thin film fixed chip
attenuators exhibit excellent high frequency
characteristics. The surface mount package is
ideal for low noise, inductance and parasitic
capacitance applications. The thin film
metallization also offers very stable
characteristics over temperature and time.
APPLICATION
HOW TO ORDER
AT
05
C
-01dB
0.3
M
LF
Terminal Type
LF = Lead Free
Packaging
M = Standard Reel Qty
O = 1,000/Reel
B = bulk (100 pieces)
Attenuation Tolerance
per the specification
Attenuation Value
EIA standard value
Impedance
C = 50Ω
D = 75Ω (for 1612 size)
Gain adjustment and impedance matching
in high frequency circuits.
Because control
circuits need signals with identical levels, and a
receiver receives signals with different signal
levels, signal levels could be adjusted by
combining a SMT attenuator and amplifier. At
the same time, termination can be obtained
using these low reflection attenuators.
Package Size
05 = 0402 18 = 1206
10 = 0805 28 = 1612
Style
Fixed Chip Attenuator
FEATURES
• Minimized parasite capacitance and inductance
• Excellent temperature and noise characteristics due to
thin film resistance elements
• Frequency ranges: DC – 10GHz
• Metallized resistors and electrodes are formed on ceramic
substrate covered with polyamide resin.
SPECIFICATION
Size
Attenuation
Attenuation
Tolerance
0-3dB:
4-7dB:
8-10dB:
0-10dB:
0-10dB:
16dB:
±0.3dB
±0.5dB
±0.7dB
±0.3dB
±0.3dB
±0.5db
Imp
Impedance
Tolerance
---
±7%
(DC)
---
±2%
(DC)
VSWR
≤1.5
≤1.3
≤1.3
See
Below
Frequency Range
0-10dB:
15dB:
20, 25dB:
0-10dB:
0-10dB:
16dB:
0-10dB:
16, 20dB:
DC-10GHz
DC-5GHz
DC-3GHz
DC-10GHz
DC-3GHz
DC-10GHz
DC-10GHz
Rated Input
Power
32mW
100mW
125mW
250mW
Refer to Derating Curve
Temperature
Range
-55°C ~ 125°C
-55°C ~ 125°C
-55°C ~ 125°C
-55°C ~ 125°C
0402
0805
1206
1612
0-10dB
0-10dB
0-10dB, 16dB
0-10dB, 16dB,
20dB
50Ω
50Ω
50Ω
50Ω
See below
Rated Ambient Temperature is 70°C
ATTENUATION TOLERANCE (1612 Size Only)
Attenuation
0dB
1-10dB
16dB, 20dB
Rank
A
A
B
B
DC-2GHz
+0.1dB/-0dB
±0.1dB
±0.2dB
±0.2dB
2-5GHz
+0.2dB/-0dB
±0.2dB
±0.3dB
±0.3dB
5-10GHz
+0.4dB/-0dB
±0.4dB
±0.5dB
±0.5dB
DERATING CURVE
VSWR (1612 Size Only)
1.1:
1.2:
1.3:
DC - 2GHz
2 - 5GHz
5 - 10GHz
188 Technology Drive, Unit H Irvine, CA 92618
TEL: 949-453-9888 FAX: 9494538889
American Accurate Components, Inc.
1
SMD Chip Attenuator
The content of this specification may change without notification 08/28/2008
DIMENSIONS (mm)
Size
0402
Size
0805
1206
W
0.50±0.05
L
2.0
±
0.10
3.2
±
0.20
dB
0dB
1dB
2 ~ 3dB
4 ~ 6dB
7 ~10dB
16 ~ 20dB
L
1.00±0.05
W
1.25
±
0.10
1.60
±
0.20
L
4.20
±
0.20
4.20
±
0.20
4.20
±
0.20
4.20
±
0.20
4.20
±
0.20
4.20
±
0.20
T
0.02±0.01
t
0.40
±
0.10
0.40
±
0.10
W
3.00
±
0.20
3.00
±
0.20
3.00
±
0.20
3.00
±
0.20
3.00
±
0.20
3.00
±
0.20
W1
0.17±0.04
a
0.50
±
0.20
1.00
±
0.25
W2
0.14±0.06
b
0.60
±
0.20
1.00
±
0.20
W1
0.30
±
0.15
0.30
±
0.15
0.40
±
0.15
0.40
±
0.15
0.40
±
0.15
0.40
±
0.15
a1
0.39±0.07
W1
0.40
±
0.20
0.55
±
0.25
W2
0.85
±
0.15
0.85
±
0.15
0.85
±
0.15
0.65
±
0.15
0.65
±
0.15
0.85
±
0.15
a2
0.29±0.05
W2
0.40
±
0.20
0.40±0.25
W3
0.70
±
0.10
0.70
±
0.10
0.90
±
0.10
0.90
±
0.10
0.90
±
0.10
0.90
±
0.10
t
0.30±0.05
W3
0.35
±
0.20
0.40
±
0.20
t
0.8
±
0.15
0.8
±
0.15
0.8
±
0.15
0.8
±
0.15
0.8
±
0.15
0.8
±
0.15
1612
L1
----
1.90
±
0.20
1.90
±
0.20
1.75
±
0.20
1.60
±
0.20
1.60
±
0.20
L2
4.20
±
0.20
0.30
±
0.20
0.30
±
0.20
0.60
±
0.20
0.90
±
0.20
1.80
±
0.20
CIRCUIT
Applicable to all Sizes
0402
Input and Output Terminals
Input and Output Terminals
Ground Terminals
LEGEND
Resistor:
Nichrome Thin Film
Protective Coat:
Polymide Resin
Terminals:
Solder Plating
Substrate:
Alumina Ceramics
Marking:
White Ink
0805
1206
1612
188 Technology Drive, Unit H Irvine, CA 92618
TEL: 949-453-9888 FAX: 9494538889
American Accurate Components, Inc.
2
SMD Chip Attenuator
The content of this specification may change without notification 08/28/2008
CHARACTERISTICS
Specification
Item
Condition
Size
0402
Short Time Overload
Voltage of 2.5 times the rated voltage shall be applied for 5
seconds.
0805
1206
1612
The attenuator shall be subjected to rated voltage for 90
minutes followed by a pause of 30 minutes at a temperature of
70±3°C. This constitutes 1 cycle. The cycles shall be repeated
for 1,000 hours.
The attenuator shall be subjected to rated voltage for 90
minutes followed by a pause of 30 minutes at a temperature of
60±2°C with relative humidity of 90% to 95%. This constitutes 1
cycle. The cycles shall be repeated for 1,000 hours.
0402
0805
1206
1612
0402
0805
1206
1612
0402
Temperature Cycle
[-55°C 30 minutes-R.T. 3 minutes-+125°C 30 minutes-R.T. 3
minutes] The attenuator shall be subjected to 5 continuous
cycles.
0805
1206
1612
0402
Resistance to Soldering
Heat
The attenuator shall be immersed into the solder of 260±5°C for
10±1 seconds.
0805
1206
1612
0402
Substrate Bending
Distance between the fulcrums: 90mm
Bending width: 3mm
Substrate: Glass-Epoxy t=1.6mm
0805
1206
1612
0402
Solderability
The attenuator shall be dipped into the solder of 235±5°C for
3±0.5 seconds. A new uniform coating of solder shall cover
95% or more of surface being immersed.
0805
1206
1612
0402
Insulation Resistance
DC 500V for 1 minute
0805
1206
1612
0402
Temperature
Characteristic
R.T. – R.T. +100°C – R.T.
0805
1206
1612
±0.02dB
±0.005dB
±0.005dB
±0.005dB
±0.02dB
±0.005dB
±0.005dB
±0.01dB
±50ppm/°C
±50ppm/°C
±50ppm/°C
±50ppm/°C
1000M
Ω
or over
A new uniform coating of solder shall
cover 95% or ore of surface being
immersed
Attenuation
0~10dB
±0.03dB
±0.02dB
±0.02dB
±0.01dB
±0.05dB
±0.04dB
±0.04dB
±0.02dB
±0.05dB
±0.04dB
±0.04dB
±0.02dB
±0.03dB
±0.02dB
±0.02dB
±0.01dB
±0.03dB
±0.02dB
±0.02dB
±0.01dB
±0.03dB
±0.02dB
±0.02dB
±0.01dB
16, 20dB
±0.03dB
±0.02dB
±0.02dB
±0.02dB
±0.05dB
±0.04dB
±0.04dB
±0.04dB
±0.05dB
±0.04dB
±0.04dB
±0.04dB
±0.03dB
±0.02dB
±0.02dB
±0.02dB
±0.03dB
±0.02dB
±0.02dB
±0.02dB
±0.03dB
±0.02dB
±0.02dB
±0.02dB
Impedance
±0.5%
±0.2%
±0.2%
±0.2%
±1.0%
±0.5%
±0.5%
±0.5%
±1.0%
±0.5%
±0.5%
±0.5%
±0.5%
±0.2%
±0.2%
±0.2%
±0.5%
±0.2%
±0.2%
±0.2%
±0.5%
±0.2%
±0.2%
±0.2%
Load Life
Moisture Load Life
Note: Impedance value and attenuation value shall be checked by DC measurement.
188 Technology Drive, Unit H Irvine, CA 92618
TEL: 949-453-9888 FAX: 9494538889
American Accurate Components, Inc.
3
SMD Chip Attenuator
The content of this specification may change without notification 08/28/2008
TAPE SIZE (mm) – Table 1
Size
0402
0805
1206
1612
A
0.65
±
0.03
1.60
±
0.20
1.85
±
0.10
B
1.15
±
0.03
2.40
±
0.20
3.60
±
0.10
4.60
±
0.10
W
8.0
±
0.20
8.0
±
0.30
8.0
±
0.20
12.0
±
0.10
F
3.5
±
0.05
3.5
±
0.05
3.5
±
0.05
5.5
±
0.10
E
1.75
±
0.10
1.75
±
0.10
1.75
±
0.10
1.75
±
0.10
P1
2.0
±
0.05
4.0
±
0.10
4.0
±
0.10
8.0
±
0.10
t
0.5
±
0.10
1.5 Max
1.0
±
0.10
0.8
±
0.10
TABLE 1
REEL DRAWING
TAPE MATERIALS
A heat press sticks the transparent or half-transparent plastic
covered tape.
REEL DIMENSIONS (mm)
Tape Width
INSERTING DIRECTION
Attenuators are packed with their cathodes on perforation side
and with their electrodes faced with the bottoms of the pockets.
8.0
±
0.1
12.0
±
0.2
A
±
∅178
∅178
2
B
±
∅60
∅60
5
C
±
∅13.5
∅13.5
1
D
±
∅21
∅21
0.5
E
±
2.5
2.5
1
W
8.4
14.0
+2
A tape reel diameter of 330mm is also applicable.
PACKAGE QUANTITY
Case Size
0402
0805
1206
1612
Standard Package Unit (pcs)
Type
Quantity
Plastic Tape
10,000
Plastic Tape
5,000
Plastic Tape
5,000
Plastic Tape
2,000
PACKAGE DESCRIPTION
ADHESION STRENGTH OF COVER AT PEELING
When the cover tape is peeled off in such a manner as indicated
in the illustration below, adhesion strength F must be within the
range of 0.2994
±
0.196N.
The standard number of attenuators to be accommodated by
one reel is as indicated in Table 1. One side surface of a reel is
marked with the following items of information.
1.
2.
3.
4.
5.
6.
7.
Name of Attenuator or product identification
Rated voltage
Attenuation value
Attenuation tolerance value
Quantity
Lot number for production month/year
Manufacturer’s name or symbol
PACKING & STORAGE
The attenuators are packed in such a manner that they will not
possibly be damaged during transit or storage. As far as they
are stored at normal temperature with normal humidity (5 to
35°C, below75% RH), they are warranted for a period of two
years from the date of manufacture.
188 Technology Drive, Unit H Irvine, CA 92618
TEL: 949-453-9888 FAX: 9494538889
American Accurate Components, Inc.
4
ADI Reference Circuit
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